New Chips on the Block
By Charles Hansen
Cirrus Logic CS48DV2
The CS48DV2 is the world’s first audio DSP processor that features Dolby Laboratories’ Dolby® Volume sound-leveling technology for digital television applications. In volume production today, the fixed-function CS48DV2 is a two-channel processor that allows TV listeners to set their preferred listening level and have it stay that way, regardless of the source or content. Cirrus Logic is planning additional audio DSPs that will incorporate Dolby Volume technology for a wide variety of consumer electronics products, such as audio/video receivers, home-theater-in-a-box systems, and stereo audio systems.
The CS48DV2 processor gives OEMs a cost effective, fixed-function, simple-to-design Dolby Volume 2.0 to 2.1 channel solution. Designed to provide high-performance volume control using the Dolby Volume algorithm, the low-power standby of the CS48DV2 DSP family preserves battery life for applications which are always on, but not necessarily processing audio, such as portable audio systems.
The CS48DV2A and CS48DV2B are primarily differentiated by the maximum number of Dolby Volume processing channels supports—2.0 channels and 2.1 channels, respectively. The first device available to the market for mass production is the CS48DV2A, which requires downloading a different Dolby Volume.
The CS48DV2B has a majority of the code in ROM and hence requires only a single small download from the host controller. The CS48DV2B also is planned to support additional pre/post-processing modules or “overlays” that are capable of running concurrently with Dolby Volume processing.
Dolby Volume Overview:
• 2.0 to 2.1 channel 32-bit fixed-function Dolby Volume processing (512
FFT Window/20-Band)
• CS48DV2 supports up to 2.1 channel 32-bit PCM I/O at Fs of 32kHz, 44.1kHz, and 48kHz
• Integrated S/PDIF transmitter
• 2/6 channel DSD input support (Rev. B)
• SPI™/I2C® serial control port
• Low-power standby: 260µW
• Consistent volume across all input sources and all content
• Consistent volume within the same program
• Eliminates need to constantly adjust volume
• Full, rich, and consistent experience at all volume levels
• Improved vocal and surround perception at low volume levels
• No artifacts or audible side effects
• Easy to design—only 10 parameters to control from host microcontroller
• High-performance and low cost
• No external SRAM/SDRAM memory needed
• Dedicated part number simplifies tracking and reporting tasks, reducing liability
• Firmware image can be downloaded from either host microcontroller or
from external SPI flash device at speeds up to 12.288MHz
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The CS48DV2 ICs are programmed with the latest Dolby Volume firmware using the Cirrus Logic proprietary GUI software development and evaluation tool called Dolby Volume Controller. This same tool then configures the CS48DV2 through the SPI™/I2C® serial port via the USB 2.0 cable. The IC can be sent a command to boot itself using firmware loaded from ROM within the CS48DV2 (starting with Rev B Silicon), or it may be downloaded through the serial control port from either a master host microcontroller or an external I2C EEPROM or SPI flash device.
In all cases, the host microcontroller is responsible for downloading the specific hardware and software configuration commands. All Dolby Volume parameters running on the CS48DV2 firmware can be adjusted in real-time as well as allowing six different presets to be saved and recalled easily, enabling very simple and quick “A/B” listening tests for the target design.
The CS48DV2 package is a 48-pin LQFP. The available evaluation board is the CRD48DV2-USB.
The planned CS48DV6 will support up to 5.1 channel 32-bit PCM I/O at Fs of 32kHz, 44.1kHz, and 48kHz.
Cirrus Logic, Inc.
2901 Via Fortuna
Austin, TX 78746
Phone: (800) 625-4084 (Product Support)
Phone: (800) 888-5016
www.cirrus.com
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Leadis Technology’s LDS9350 High-Fidelity Stereo CODEC
The LDS9350 combines a high-fidelity stereo CODEC, DSP-based audio processing, two high-efficiency headphone amplifiers usable in stereo or mono mode, and a stereo FM transmitter in a compact solution for portable media devices. The chip features dual audio outputs to either high-fidelity stereo headphones or professional broadcast-quality stereo FM radio. Design innovations provide programmable control features for optimal audio signal integrity and power management. The chip accepts I2S digital and configurable analog inputs including stereo line in, and stereo or differential mono microphone concurrently. Line and microphone inputs offer programmable gain and a bypass mode.
The 2-channel 24-bit DAC achieves an SNR of 102dB with sampling rates between 8kHz and 192kHz. An on-board DSP and digital PLL are utilized for audio signal filtering and mixing, volume control, and soft mute. Stereo audio is output to headphones or FM radio. For wired output to headphones, Gmax stereo amplifiers (patent-pending) deliver 2 × 55mW into a 16Ω load, dissipating 50% less power than competing chips at real-world listening levels.
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To transmit wirelessly to FM bands, the LDS9350 outputs through an internal RF power amplifier with 57dB typical SNR and 0.16% THD. FM bands are selectable for worldwide operation: 87.5MHz to 108MHz for US and Europe and 76MHz to 90MHz for Japan. Pre-emphasis and transmit power level are chosen per country-specific regulatory standards. Chip operation is conveniently controlled through I2C or a 3-wire microprocessor interface.
The LDS9350’s highly integrated architecture includes an on-chip DC-to-DC converter, which can be configured as a voltage booster or divider to generate system voltages, eliminating external voltage regulators. The flexible clock PLL accepts and generates many standard audio frequencies, eliminating multiple crystals. Decoupling capacitors on analog inputs are not required due to the anti-aliasing properties of the ADC. The innovative dual output architecture of the LDS9350 enables stereo audio output to either headphones or FM radio bands worldwide.
The chip accepts analog or I2S audio input, and the stereo CODEC delivers 102dB SNR fidelity to ultra-low power patent-pending headphone amplifiers. The on-board DSP and I2C or 3-wire microprocessor control interface offer selectable FM bands and country-specific transmit power levels for operation in the US, Europe, and Japan. Advanced radio techniques deliver professional broadcast-quality stereo audio over the full 76 to 108MHz FM bandwidth.
The on-chip DC-to-DC converter supplies all common system voltages from an AAA battery. The flexible on-chip clock PLL accepts and generates needed system frequencies, eliminating multiple crystals. Most external components are eliminated in LDS9350-based systems, including large DC blocking capacitors on the amplifier outputs and as many as 40 passive components for the FM transmitter function.
The LDS9350 targets portable media players and other portable audio devices.
Leadis Technology, Inc.
800 W.California Ave., Suite 200
Sunnyvale, CA 94086-4834
408 331-8600
Fax: 408 331-8601
www.leadis.com
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ADAV4312/4412/4322/4422
Analog Devices’ Audio Processors for Advanced TV with Sound IF Demodulator and Stereo Decoder
The ADAV43x2/ADAV44x2 are part of a family of enhanced audio processors targeting advanced TV applications, with full support for digital and analog baseband audio as well as multi-standard broadcast SIF demodulation and decoding.
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The audio processor, by default, loads a dedicated TV audio flow that incorporates full matrix switching (any input to any output), automatic volume control that compensates for volume changes during advertisements or when switching channels, dynamic bass, a multiband equalizer, and up to 200ms of stereo delay memory for audio-video synchronization.
Alternatively, Analog Devices offers an award-winning graphical programming tool (SigmaStudio™) that allows custom flows to be quickly developed and evaluated. This allows the production of customer-specific audio flows, including the use of Analog Devices’ library of third-party algorithms.
The analog I/O integrates Analog Devices’ proprietary continuous-time, multi-bit ∑-Δ architecture to bring a higher level of performance to ATV systems, required by third-party algorithm providers to meet system branding certification. The analog input is provided by 95dB dynamic range (DNR) ADCs, and the analog output is provided by 95dB DNR DACs.
The main speaker outputs can be supplied as a voltage out from the integrated DAC channels (ADAV4312 and ADAV4322) or as a digitally modulated PWM stream to support digital amplifiers (ADAV4412 and ADAV4422).
The ADAV43x2/ADAV44x2 include multichannel digital inputs and outputs. In addition, two of the digital input channels can be routed through integrated sample rate converters (SRC), which are capable of supporting any arbitrary sample rate from 5kHz to 50kHz.
Target applications are
■ General-purpose consumer audio postprocessing
- Home audio
- DVD-Rs
- Home-theater-in-a-box (HTiB)
systems and DVD receivers
■Audio processing subsystems for DTV-ready TVs
■Analog broadcast capability for iDTVs
Features include
■Sound IF (SIF) processor
- SIF demodulator and broadcast stereo decoder
- ADAV4312 and ADAV4412–NTSC region (BTSC-M, EIAJ-M, A2-M)
- ADAV4322 and ADAV4422–Worldwide (NICAM-BG/DK/I/L, A2-BG/DK/M, BTSC-M, EIAJ-M)
- Automatic sound IF standard detection
■Fully configurable 28 bit audio processor—loads comprehensive TV audio flow on reset
■Also supports SigmaStudio™ with Analog Devices Inc. and third party branded algorithms for custom design
■Adjustable digital delay line for audio/video
- Synchronization for up to 200ms stereo delay
■High performance 24-bit ADC and DAC
- 95dB DNR performance on DAC channels
- 95dB DNR performance on ADC channels
- Dual headphone outputs with integrated amplifiers
■Choice of high performance pulse-width modulation (PWM) digital outputs (ADAV4412 and ADAV4422) or DAC analog voltage outputs (ADAV4312 and ADAV4322)
■Multichannel digital baseband I/O
- 4 stereo synchronous digital I2S® input channels
- 2 stereo asynchronous I2S channels with integrated SRC supporting input sample rates from 5kHz to 50kHz
- 1 stereo synchronous digital I2S output
- S/PDIF output with S/PDIF input mux capability
■Fast I2C® control
■Operates from 3.3V (analog), 1.8V (digital core), and 3.3V (digital interface)
- Features on-chip 1.8V regulator eliminating the need for a 1.8V supply
■ADAV4312–NTSC region SIF, voltage output
- ADAV4412–NTSC region SIF, PWM output
- ADAV4322–Worldwide SIF, voltage output
- ADAV4422–Worldwide SIF, PWM output
The devices are packaged in an 80 ld LQFP (14 × 14mm).
Analog Devices Inc
804 Woburn St.
Wilmington, MA 01887
(781) 937-1428
fax (781) 937-1021
www.analog.com
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ADAV4X01
Similarly, Analog Devices has released the ADAV4101/ADAV4201 family of high performance analog and digital input/output audio processors.
Features include:
■ Adjustable digital delay, up to 200ms stereo delay
■ High performance 24-bit ADC and DACs with 95dB DNR performance
■ Headphone output with integrated amplifiers
■ Choice of high performance pulse-width modulation (PWM) digital outputs (ADAV4201) or DAC analog voltage outputs (ADAV4101)
■ 4 Stereo Digital Audio inputs (I2S) support synchronous or asynchronous inputs (2 SRCs with sample rates 5kHz to 50kHz)
■ 1 stereo synchronous digital I2S output
■ S/PDIF output with S/PDIF input multiplexer capability
■ Fast I2C® control
■ Operates from 3.3V and 1.8V supplies (with on-chip regulator to derive 1.8V from a single 3.3V supply)
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Analog Devices Inc
804 Woburn St.
Wilmington, MA 01887
(781) 937-1428
fax (781) 937-1021
www.analog.com
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National Semi LME Family
National Semiconductor has introduced its first ultra-low distortion, low noise, high slew rate analog integrated circuits specifically aimed at the high-end audio community. These are the first NSC audio devices since the LM387 was introduced back in the late 1970s. NSC combines advanced leading-edge process technology with state-of-the-art circuit design and topologies to give these devices noise, distortion, and bandwidth specifications that meet or exceed those of discrete designs. The other news here is that NSC has built a dedicated sound room for evaluating the sound quality of these new devices, equipped with custom designed electronics, monoblock power amps, and Wilson WATT/Puppy 7 loudspeakers. Demonstration boards are available for each package.
The LME497x0 family of audio op amps includes the LME49710 single, the LME49720 dual, and the LME49740 quad. They combine extremely low voltage noise density (2.5nV/√Hz) with vanishingly low THD+N (0.00003%) to easily satisfy the most demanding audio applications. To ensure that the most challenging loads are driven without compromise, the LME497x0 family has a high slew rate of ±20V/µs, GBW of 55MHz, and an output current capability of ±26mA. Further, dynamic range is maximized by an output stage that drives 2kΩ loads to within 1V of either power supply voltage and to within 1.4V when driving 600Ω loads.
The outstanding LME497x0 CMRR (120dB), PSRR (120dB), and VOS (0.05mV) give these amplifiers excellent operational amplifier DC performance.
The LME497x0 family has a supply range of ±2.5V to ±17V. The input circuitry maintains the excellent common-mode and power supply rejection over this supply range, as well as maintaining its low input bias current. The LME497x0 family is unity gain stable with output short circuit protection. They achieve outstanding AC performance while driving complex loads with values as high as 100pF.
The LME49710 is available in 8–lead narrow body SOIC, 8–lead plastic DIP, and 8–lead metal can TO-99. Device price for +100 pieces is $1.35.
The LME49720 is available in 8–lead narrow body SOIC, 8–lead plastic DIP, and 8–lead metal can TO-99. Device price for +25 pieces is $2.83.
The LME49740 is available in 14–lead narrow body SOIC and 14–lead plastic DIP. Device price for +100 pieces is $5.38.
The dual unity-gain stable LME49860 is also optimized and fully specified for high performance, high fidelity applications. The LME49860 has extremely low voltage noise density (2.7nV/√Hz) with vanishingly low THD+N (0.00003%), a high slew rate of ±20V/µs, and an output current capability of ±26mA. The output stage drives 2kΩ loads to within 1V of either power supply voltage and to within 1.4V when driving 600Ω loads.
The LME49860 has a wider supply range of ±2.5V to ±22V and excellent CMRR (120dB), PSRR (120dB), and VOS (0.1mV) characteristics. It achieves outstanding AC performance while driving complex loads with values as high as 100pF. The op amp has output short circuit protection.
The LME49860 is available in 8–lead narrow body SOIC and 8–lead plastic DIP packages. Device price for +100 pieces is $3.36. Demonstration boards are available.
The target applications for both of these audio op amp families is
• Ultra high quality audio amplification
• High fidelity preamplifiers
• High fidelity multimedia
• State-of-the-art phono preamps
• High performance professional audio
• High fidelity equalization and crossover networks
• High performance line drivers
• High performance line receivers
• High fidelity active filters
The third new product is the LME49810 monolithic 200V audio power amplifier driver IC with an integrated output Baker clamp. This device is intended to replace dozens of matched discrete parts, and will drive discrete high-power bipolar output transistors. It can source up to 50mA for audio systems delivering up to 3kW of audio power.
Amplifier output power may be scaled by changing the supply voltage and number of power transistors. The LME49810’s minimum output current is 50mA. When using a discrete output stage the LME49810 is capable of delivering in excess of 300W into a single-ended 8Ω load.
Key parameters are
• Wide operating voltage range ±20V to ±100V
• Slew rate 50V/µs (typical)
• Output drive current 60mA (typical)
• PSRR (f = DC) 110dB (typical)
• THD+N (f = 1kHz) 0.0007% (typical)
Unique to the LME49810 is an internal Baker clamp. It is implemented by an array of diodes connected between the base and collector of a bipolar transistor. This clamp ensures that the amplifier output does not saturate when over-driven. The resultant “soft clipping” of high level audio signals suppresses undesirable audio artifacts generated when conventional solid-state amplifiers are driven hard into clipping.
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The LME49810 includes thermal shutdown circuitry that activates when the die temperature exceeds 150° C. The LME49810’s mute function, when activated, mutes the input drive signal and forces the amplifier output to a quiescent state.
The LME49810 is available in a 15-lead TO-247 single gauge, 19.00 × 11.50 × 2.54mm package. Device price for +100 pieces is $8.15. NSC estimates that its prototype power amplifiers could be sold commercially for about $300. Demonstration boards are available.
National Semiconductor
Santa Clara, CA
1-800-272-9959
www.national.com
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Allegro STD01N and STD01P
Allegro introduced the STD01N and STD01P Darlington transistors aimed at professional audio amplifiers and car audio amplifiers. The STD01N and STD01P are enhanced Darlington transistors with built-in drivers and temperature compensation diodes. Manufactured using the unique Sanken thin-wafer production technology, these devices achieve higher power levels through decreased thermal resistance, and can withstand higher voltages than similar devices on the market.
The five temperature compensation diodes are integrated on the P-channel power transistor chips. By this design, the STD01N and STD01P output pair eliminates delays that would otherwise be induced between thermal sensing at the heat source, and the operation of the compensation circuitry. Thus, these transistors are ideal for applications in which enhanced thermal stability is required.
This device is provided in a 5-pin TO-3P plastic package with pin 4 removed. Contact Allegro® for application support and additional information on device performance.
Features
• High power (100W) handling in a small package (TO-3P), for minimized heatsink requirements
• Built-in drivers and temperature compensation diodes, reducing external component count and simplifying circuit design
• Emitter terminals placed symmetrically—pin 5 on NPN and pin 1 on PNP models—allowing adjacent placement on PCB to minimize trace length and output skew when used in pairs
Vceo is 150V with a collector current of 10A. Two different hFE ranges are available: Range O 5,000 to 12,000, or Range Y 8,000 to 20,000. The devices are RoHS compliant.
Higher power versions are also available. The STD02N and STD02P are rated for 130W and the STD03N and STD03P are rated for 160W.
Also available on the website is the Selection Guide for Sanken Power Transistors. Device pricing is $1.50 for the STD01N and $1.70 for the STD01P (US$, 1k pieces).
Allegro MicroSystems, Inc
(Allegro-Sanken)
115 Northeast Cutoff
Worcester, MA 01606 USA
Phone: (508) 853-5000
Fax: (508) 853-3353
sales@allegromicro.com
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Cirrus Logic CS4350
The CS4350 digital-to-analog converter (DAC) is a complete stereo audio said to be noteworthy for its superior audio quality and ease of design. The CS4350 features an on-chip phase-locked-loop (PLL) based master clock. This on-chip master clock supports 24-bit resolution and up to 192kHz sampling rates with 108dB dynamic range. Because of its on-chip PLL, the CS4350 is ideal for applications in which an audio-related system clock is not present, such as set-top boxes, digital televisions, personal video recorders, DVD players and recorders, A/V receivers and automotive applications such as head units, telematics, and in-car entertainment systems. It has both differential?amd single-ended outputs.
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The CS4350 is based on an advanced multibit Delta-Sigma architecture that provides the basis for its excellent dynamic range and improved out-of-band noise performance. By integrating the PLL, the CS4350 has eliminated the need for external master clock routing across the circuit board by locking to the incoming left-right clock signal, as opposed to the video clock or other high-speed clock sources, thus significantly reducing interference and clock-jitter sensitivity. This feature gives system designers a very high-performance DAC that also simplifies product designs.
Features
• Advanced multibit Delta-Sigma modulator
• 24-bit conversion
• Up to 216kHz sample rates
• Automatic sample-rate detection
• 108dB dynamic range
• -95dB THD+N
• On-chip control and serial port level shifters
• Popguard® technology for control of clicks and pops
• Low-latency digital filtering
• Integrated PLL locks to incoming left-right clock—no MCLK required
• Supports PCM and TDM audio formats
• Single-ended or differential analog output architecture
The 24 TSSOP chip can use either a 3.3V or 5V supply.
Cirrus Logic, Inc.
2901 Via Fortuna
Austin, TX 78746
(800) 888-5016
www.cirrus.com
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Analog Devices AD8175 Crosspoint Switch
The AD8175 is a high speed, triple 16 × 9 video crosspoint switch matrix. It supports 1600 × 1200 RGB displays at 85Hz refresh rate, by offering a 500MHz bandwidth and a slew rate of 1800V/µs. With -88dB of crosstalk and -94dB isolation (at 5MHz), the AD8175 is useful in many high speed video applications.
The AD8175 supports two modes of operation: differential-in to differential-out mode with sync-on CM signaling passed through the switch, and differential-in to differential-out mode with CM signaling removed through the switch. The output CM and black level can be conveniently set via external pins.
The independent output buffers of the AD8175 can be placed into a high impedance state to produce larger arrays by paralleling crosspoint outputs. Inputs can be paralleled as well. The AD8175 offers both serial and parallel programming modes.
The AD8175 is packaged in a fully populated 676 (27 × 27mm) ball PBGA package and is available over the extended industrial temperature range of -40° C to +85° C.
Features
• High channel count, triple 16 × 9 high speed, non-blocking switch array
• Pin compatible with AD8176 (16 × 9 switch array) and AD8177 or AD8178 (16 × 5 switch arrays)
• Differential or single-ended operation G = +2 operation (differential input to differential output)
• Supports sync-on common-mode and sync-on color operating modes. Decoded HV sync outputs available
• Adjustable output CM and black level through external pins
• Flexible power supplies: +5V or ±2.5V
• Excellent AC performance (to sup- port 1600 × 1200 at 85Hz) [UXGA])
Bandwidth: 500MHz
Slew rate: 1800V/µs
Settling time: 4ns to 1%
• Low power of 3.5W
• Low all-hostile crosstalk
-88dB at 5MHz
-46dB at 500MHz
• Wide input common-mode range of 4V
• Reset pin allows disabling of all outputs
• Convenient grouping of RGB signals for easy routing
Applications
– RGB video switching
– Professional video
Device pricing $95 US (100-499 pieces, AD8175ABPZ), Evaluation Board available.
Analog Devices Inc
804 Woburn St.
Wilmington, MA 01887
(781) 937-1428
Fax (781) 937-1021
www.analog.com
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Texas Instruments TAS3208
The TAS3208 Dual Core Digital Audio Processor is designed to be the core device in flat-panel digital TV audio systems. It is an audio system-on-chip (SOC) designed for digital TV audio systems
and mini/micro component applications. TAS3208 has a programmable audio DSP that preserves high-quality audio by using a 48-bit data path, 28-bit filter coefficients, and a single-cycle 28 times
48-bit multiplier. The programmability feature allows you to customize features in the DSP RAM.
The TAS3208 is composed of the following functional blocks.
• Clock and serial data interface
• Analog input and output
• 8051 WARP controller, serial control interface, and device control
• Audio DSP—Digital Audio Processing
• Power supply
• Internal references
Features of the TAS3208:
• Audio input/output
• Three synchronous serial audio inputs (six channels)
• Two synchronous serial audio outputs (four channels)
• Input and output data formats: 16-, 20-, or 24-bit data left, right, and I2S
• SPDIF transmitter
• 64 × Fs bit clock rate
• 512 × Fs XTAL input for master-mode clock rates
• 256 × Fs MCLKIN for slave-mode clock rates
• Ten multiplexed stereo analog inputs selectable into one stereo ADC and three stereo line outputs
– High-quality 93dB DNR (typical) ADC channel performance (two channels)
– A single-ended analog stereo line driver output with 1 of 11 selectable inputs, 10kΩ, 100pF drive capability (typical output level: 1V RMS)
• Three stereo audio DACs
– High-quality 96dB DNR (typical) DAC channel performance (six channels)
– Stereo headphone amplifier, 24mW power output into 16Ω, 100pF
• Audio digital signal processor
• Programmable functionality
• 135MHz operation
• 48-bit data path with 76-bit accumulator
• Hardware single cycle multiplier (28 × 48)
• Two memory loads and one memory store per cycle
• Usable 768 data RAM words (48-bit), usable 1K coefficient RAM (28-bit)
• Usable 2.5K program RAM
• 360mS at 48kHz, 17280 words 24-bit delay memory for video sync
• System control processor
• Embedded 8051 WARP microprocessor
• Programmable using standard 8051 C compilers
• 16K words of program RAM (8-bit)
• 2048 words of data RAM (8-bit)
• 256 words of internal RAM (8-bit)
• Programmable functionality
• General features
• Easy-to-use control interface
• I2C serial control master and slave interface
• Control interface operational without external MCLK input
• Single 3.3V power supply
• Integrated regulators
• 100-pin TQFP package
TSA3208 pricing $6.50 US (1k pieces)
Texas Instruments Semiconductor Group
12500 TI Blvd
Dallas, TX 75243
(800) 336-5236
www.ti.com
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Texas Instruments TAS3204
The TAS3204 High Performance Dual Core DSP/MCU Audio Processor is optimized to provide high-quality sound processing for MP3 player docking stations. It is an audio system-on-chip (SOC) designed
for mini/micro systems, multimedia-speaker, and MP3 player docking systems. It includes analog interface functions: three multiplex (MUX) stereo inputs with two stereo analog-to-digital converters
(ADCs), two stereo digital-to-analog converters (DACs) with analog outputs consisting of differential stereo line drivers. Four channels of serial digital audio processing are also provided. The
TAS3204 has a programmable audio digital signal processor (DSP) that preserves high-quality audio by using a 48-bit data path, 28-bit filter coefficients, and a single cycle 28 × 48-bit multiplier.
The programmability feature allows users to customize features in the DSP RAM.
The TAS3204 is composed of eight functional blocks:
• Analog input/mux/stereo ADC
• Two stereo DACs
• Analog reference system
• Power supply
• Clocks, digital pll, and serial data interface
• I2C control interface
• 8051 microcontroller
• Audio DSP—digital audio processing
TAS3204 Features:
• High-quality audio performance: 102dB ADC/105dB DAC (typical) DNR
• Eight-channel programmable audio DSP (four-channel digital and four-channel analog)
• Three differential stereo analog inputs multiplexed to two stereo input ADCs
• Two differential stereo output DACs
• Two serial audio inputs (four channels) and two serial audio outputs (four channels)
• 135MHz maximum speed, >2800 processing cycles per sample at 48kHz
• 512 × Fs XTAL input in master mode, 512 × Fs MCLK_IN in slave mode
• 48kHz sample rate in master mode
• 44.1 or 48kHz sample rate in slave mode
• 48-bit data path and 28-bit coefficients
• 768 words of 48-bit data memory
• 1022 words of 28-bit coefficient memory
• 3K words of 55-bit program RAM
• Hardware single-cycle multiplier (28 × 48)
• 2812 instructions per Fs
• 5.88K words of 24-bit delay memory (122.5ms at 48kHz)
• Data formats: left justified, right justified, and I2S
• Two I2C ports for slave or master download
• Single 3.3V power supply
• Graphical development environment provided for audio processing; e.g., EQ, algorithm development, and so on
• 64-pin TQFP package
• Applications
– MP3 docking systems
– Digital televisions
– Mini-component audio
TAS3204 pricing $6.15 US (1k pieces)
Texas Instruments Semiconductor Group
12500 TI Blvd
Dallas, TX 75243
(800) 336-5236
www.ti.com
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XCeive XC5000 Ultra Small, Analog and Digital, Terrestrial and Cable TV Receivers
www.xceive.com
The XC5000 is the world’s most highly integrated Silicon TV Tuner specifically designed for flat panel televisions. This next-generation tuner offers state-of-the-art performance where both
analog and digital reception is required. The XC5000 is the only Hybrid Global TV Tuner with an on-board DSP controller. This unique architecture achieves world-class tuner performance
for all major analog and digital broadcast television standards.
In addition to the DSP, on-board filters are reconfigured to meet the different TV standards requirements. Gain blocks are adjusted to maximize performance regardless of the external environmental
changes on the signal. To improve overall reliability in tolerance specifications and yield, the DSP controller minimizes tuner-to-tuner performance variations.
Features:
World’s smallest Hybrid TV tuner:
• 10-15 times faster than a typical tuner
• Fully integrated RF-to-Baseband
• No metal shield required
• Alignment-free
• No external tunable parts
Built-in VIF/SIF circuit Supports all analog TV standards:
• NTSC, PAL, SECAM
• CVBS, SIF or mono-sound output
• Works well for non-standard signals
Supports all digital TV standards:
• ATSC, OpenCable
• DVB-T, DVB-C
• ISDB-T, DMB-TH
Quick tuning supports ChannelVista™, a new feature being integrated in the latest TVs and PC-TVs. It consists of two Xceive XC5000 QuickTune tuners. One tuner is used for the main picture
and another tuner is used for the “Picture-in-picture” or PIPs.
Easily monitors signal performance
IIC bus controlled
XC5000 Specifications:
Supply Voltage (DC) 1.8V, 3.3V
System setting time 5ms
Input Impedance 75Ω
VSWR 2.5 (typical)
Noise Figure (typical) 5dB
Phase noise at 10kHz –95dBc (typical)
CTB –63dBc
Image rejection 65dB
AGC range 90dB
Video SNR (unweighted) 54dB
Frequency range 42 - 864MHz
Power Dissipation 1.0W
Ultra small 48-pin QFN 7 × 7 × 0.85mm
package, Leadfree
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Silicon Labs Si473x AM/FM Radio Receiver
www.silabs.com
The Si4730/31 is the industry’s first fully integrated, 100% CMOS AM/FM radio receiver IC. Offering unmatched integration and PCB space savings, the Si4730/31 only requires two external components
and less than 15mm² of board area, excluding the antenna inputs. The Si4730/31 AM/FM radio provides low power consumption for portable devices while delivering high performance.
Using Silicon Laboratories’ patented Si4700/01 FM tuner digital low intermediate frequency (low-IF) receiver architecture, the Si4730/31 delivers superior RF performance and interference rejection
on both AM and FM bands. Digital signal processing provides optimum sound quality signal under varying reception conditions.
The Si4730/31 includes advanced seek algorithms, soft mute, auto-calibrated digital tuning, and FM stereo processing. In addition, the Si4730/31 provides analog or digital audio output
and a programmable reference clock. The device supports I²C-compatible 2-wire control interface, and a Si4700/01 backwards-compatible 3-wire control interface.
The Si4730/31 on-chip DSP provides excellent pilot rejection, selectivity, and audio performance. The on-chip micro-controller offers both the manufacturer and the end-user extensive programmability
and flexibility.
The Si4731 incorporates a digital processor for the European Radio Data System (RDS) and the North American Radio Broadcast Data System (RBDS) including all required symbol decoding, block
synchronization, error detection, and error correction functions. Using this feature, the Si4731 enables broadcast data such as station identification and song name to be displayed to the user.
Features:
• Worldwide FM band support (76–108MHz)
• Worldwide AM band support (520–1720kHz)
• Frequency synthesizer with integrated VCO
• Advanced AM/FM seek tuning
• Automatic frequency control (AFC)
• Automatic gain control (AGC)
• Automatic AM/FM digital tuning
• Digital FM stereo decoder
• Programmable de-emphasis
• Adaptive noise suppression
• Integrated LDO regulator
• Programmable reference clock
• Volume control
• Soft mute control
• Only 2 external components
• RDS/RBDS processor (Si4731 only)
• 2-wire and 3-wire control interface
• 2.7 to 5.5V supply voltage
• Firmware upgradeable
• Ferrite loopstick and air loop antenna support
• 3 × 3 × 0.55mm 20-pin QFN package, Pb-free/RoHS compliant
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Texas Instruments TAS5261 Digital-Audio Amplifier Power Stage
The TAS5261 is the highest power single-chip Class D power stage and delivers 110dB SNR for ultimate sound clarity in home audio applications. It drives > 300W into a 4Ω speaker
(10% THD+N) and can drive 125W, 8Ω, at less than 0.09% THD+N with 95% efficiency. As part of TI’s PurePath Digital™ power stage product line it offers unparalleled power
and current handling capability.
Key Features:
• High power and current drive for the most demanding home theater systems.
• 110dB SNR (A-weighted with TAS5518 modulator)
• Supports PWM frame rates of 192kHz to 384kHz
• Resistor-programmable current limit
• Power-on reset (POR) eliminates system power-supply sequencing
• Class-D operation with extremely low on-resistance FETs enable greater than 95% efficiency that delivers pure power, not heat
• Over-current protection against output shorts without unwanted shutdowns from speaker-impedance variations over frequency
• The TAS5261 has complete protection circuitry integrated on chip, safeguarding the device and speakers against fault conditions that could damage the system, such as short-circuits,
overcurrent, undervoltage, and a PWM activity detector for loss of PWM input signals.
Total output power:
• 125W into 8Ω at <0.09% THD+N
• 220W into 6Ω at 10% THD+N
• 315W into 4Ω at 10% THD+N
Texas Instruments Semiconductor Group
12500 TI Blvd
Dallas, TX 75243
(800) 336-5236
www.ti.com
Top of Page
The AD8196-7
The AD8196 and AD8197 are HDMI/DVI switches featuring equalized TMDS inputs and pre-emphasized TMDS outputs, ideal for systems with long cable runs. Outputs can be set to a high impedance
state to reduce the power dissipation and/or allow the construction of larger arrays using the wire-OR technique.
The AD8196 is a 2:1 switch, the AD8197 is a 4:1 version.
AD8196 features:
• Two (AD8196) or four (AD8197) inputs, one output HDMI/DVI links.
• Enables HDMI 1.3-compliant receiver.
• Pin-to-pin compatible with the AD8190 and AD8191.
Four TMDS channels per link.
Supports 250 Mbps to 2.25 Gbps data rates.
Supports 25MHz to 225MHz pixel clocks.
Equalized inputs for operation with long HDMI cables (20m at 2.25 Gbps).
Fully buffered unidirectional inputs/outputs.
Globally switchable 50Ω on-chip terminations.
Pre-emphasized outputs.
Low added jitter.
Single-supply operation (3.3V).
• Four auxiliary channels per link.
Bidirectional unbuffered inputs/outputs.
Flexible supply operation (3.3V to 5V).
HDCP standard compatible allows switching of DDC bus and two additional signals.
• Output disable feature for reduced power dissipation.
- Output termination removal.
- AD8197 allows building of larger arrays.
• Two AD8196/97 chips support HDMI/DVI dual-link.
- AD8197 supports multiple channel bundling modes.
° 1× (4:1) HDMI/DVI link switch (default).
° 2× (8:1) TMDS channel and auxiliary signal switch.
° 1× (16:1) TMDS channel and auxiliary signal switch.
• Standards compliant: HDMI receiver, HDCP, DVI.
• Serial (I2C slave) control interface.
The AD8196 is provided in a space-saving 56-lead LFCSP. The AD8197 is provided in a space-saving 100-lead 14mm × 14mm LQFP. These surface-mount Pb-free plastic packages are specified
to operate over the –40° C to +85° C temperature range.
Evaluation boards are available. Contact Analog Devices (804 Woburn St., Wilmington, MA 01887, (781) 937-1428, Fax (781) 937-1021, www.analog.com) for prices and availability.
Top of Page
OPA827, OPA2827
The JFET input OPA827 series achieves low 4.5nV/√Hz noise density with a quiescent supply current of only 4.5mA. This device was developed using the industry’s first complementary
bipolar 36V silicon germanium (SiGe) process, BiCom3HV.
The OPA827 series combines outstanding DC precision with excellent AC performance. It offers 100µV of offset, very low drift (1µV/° C) over temperature, low bias currents,
and very low flicker noise of 400nVPP (0.1 to 10Hz). It operates over a very wide supply voltage range of ±4V to ±18V. A dual version is also available for the OPA827 family.
Excellent AC characteristics, such as 18MHz gain bandwidth (GBW) and 22V/µs slew rate, and precision DC characteristics make the OPA827 series well-suited for a wide range of applications
such as 16- to 18-bit data acquisition systems, transimpedance (I/V-conversion) amplifiers, filters, precision ±10V front-ends, and professional audio applications.
The single version (OPA827) is available in both MSOP-8 and standard SO-8 surface-mount packages. The dual version (OPA2827) is available in the small TSSOP-8 and in the standard SO-8 packages.
All versions are specified from –40° C to +125° C.
Texas Instruments
Burr-Brown Products
PO Box 11400
Tuscon, AZ 85734
(800) 548-6132
www.burr-brown.com.
Top of Page
OPA211, OPA2211
The bipolar input OPA211 series achieves very low 1.1nV/√Hz noise density with a supply current of only 3.6mA. It also offers rail-to-rail output swing, which helps to maximize dynamic
range. This device was developed using the industry’s first complementary bipolar 36V silicon germanium (SiGe) process, BiCom3HV.
The OPA211 series of op amps provides <1µs settling time to 16-bit accuracy even for large output swings. This AC performance, combined with only 100µV of offset and low
drift over temperature, makes the OPA211 highly suitable for driving fast, high-precision analog-to-digital converters (ADCs) or buffering the outputs of high-resolution digital-to-analog
converters (DACs).
The OPA211 can deliver 30mA output current. It has a gain bandwidth product of 80MHz (G = 100) and a slew rate of 27V/µs. It is specified over the very wide dual-power supply range
of ±2.25V to ±18V, or single-supply operation from +4.5V to +36V.
The OPA211 is available in the tiny DFN-8, 3 × 3mm and MSOP-8 and SO-8 packages. A dual version, the OPA2211, is available in the DFN-8, 3 × 3mm or an MSOP-8 package. This series
of op amps is specified from –40° C to +125° C.
Texas Instruments
Burr-Brown Products
PO Box 11400
Tuscon, AZ 85734
(800) 548-6132
www.burr-brown.com.
Top of Page
Cirrus Logic CS3318
The flagship CS3318, from Cirrus Logic, is an eight-channel,
high-voltage, digitally controlled analog volume control IC that
showcases 127dB dynamic range.
The CS3318 operates from a ±9V power supply, with 118dB
adjustable gain ranging from +22dB to –96dB, negligible distortion,
and excellent inter-channel isolation. Plus, a 0.25dB step size
with zero-crossing detection and programmable time-out ensures
remarkably smooth control of volume adjustment. The CS3308 is
a pin-compatible ±5V version with a very high dynamic range
of 123dB.
Both the CS3318 and CS3308 reduce external component count and
printed circuit board space, helping OEMs achieve more compact
products at a lower cost. Patent-pending technologies, such as
dynamic address assignment and simultaneous master volume controls
across multiple devices over a single serial control bus, simplify
designs and further reduce costs. For further information, visit
www.cirrus.com.
Applications:
A/V receivers
home theater systems
digital mixing consoles
outboard audio converters
PC soundcards
external audio interfaces
DSP amplifiers and in-car systems
Top of Page
AVX GZ Series Capacitor
AVX Corporation has developed the GZ multi-layer capacitor (MLC)
series specifically designed to address DC blocking issues from
15kHz to 40GHz in optical transceivers. The technology incorporates
small footprint devices to conserve board space and is designed
to match .015 (0.381mm) and .020 (0.508mm) micro strip widths.
The assemblies combine high capacitance Ni-Au (nickel-gold)
terminated MLCs for low frequency coverage. Specially configured
maxi dielectric single layer ceramics are designed to facilitate
conventional surface mounting. Most applications will experience
resonance-free performance of <0.5dB through at
least 26.5GHz.
AVX provides the GZ Series in a wide range of sizes
and capacitance offerings. The small capacitors are manufactured
using X7R dielectrics. The soft termination makes the capacitors
robust and capable of exceeding the resistance-to-flexure stress
tests normally applied to MLCs. The high temperature connection
between the MLC and SLC results in a joint whose re-melt
temperature will withstand all normal soldering processes without
deterioration.
Pricing for the SQCS Series ranges from $1.00 to
$4.00, depending on volume and tolerance. Delivery is stock to
six weeks.
AVX has also developed a porcelain and ceramic dielectric
MLC that provides industry-leading performance for high Q, low
ESR, and high self-resonance in an 0603 package with voltages
up to 250V DC.
Designated the SQCS Series and offering the best
electrical performance available in this package size, the chips
are ideal for RF/microwave applications ranging from 1MHz to 10GHz,
including power amplifiers, filters, low-noise amplifiers, and
GPS.
Because the SQCS Series demonstrates highly stable
NP0 (negative-positive-zero) characteristics, it is ideal for
applications where performance needs to be maintained despite
the possibility of extreme temperature changes. The capacitor
has an operating range of –55° C to +125° C.
Custom designs, including those to match wider strip
lines, are available on request. Wire-bondable designs for applications
where strip line matching is not imperative are also available.
The SQCS Series has a capacitance range of 0.1pF
to 100pF.
Pricing for the SQCS Series ranges from $0.04 to
$0.50, depending on volume and tolerance. Delivery is stock to
six weeks.
AVX Corp
801 17th Avenue South, Myrtle Beach, SC 29578
843-448-9411, FAX 843-444-2864
www.avx.com
Top of Page
TI TPA3200D Digital
Power Amp
The TPA3200D1 is a 20W (per channel) efficient digital audio power
amplifier for driving a bridged-tied speaker. The TPA3200D1 can
drive a speaker with an impedance as low as 4. The high efficiency
of the TPA3200D1 (85%) eliminates the need for an external heatsink.
The digital input accepts 16-24 bit data in I2S
format or 16-bit word right-justified 5kHz to 200kHz sampled data
for easy audio processor and ADC interfacing. Selectable gain
settings (12, 18, and 24dB) allow easy configuration of volume
ranges, and BTL output maximizes output power from a limited supply
voltage. A digital filter performs an 8× interpolation function.
Other features include soft mute, a zero input detect output flag
for power conscious designs, and power saving shutdown mode.
The TPA3200D1 delivers 20W into 8 from an 18V supply
at 10% THD+N. The device has a wide supply range of 8V to 18V.
Device pricing $2.95 US (1000 pieces). The TPA3200D1EVM
Evaluation Module is also available.
Texas Instruments Semiconductor Group
12500 TI Blvd
Dallas, TX 75243
(800) 336-5236
www.ti.com
Top of Page
Zetex
ZXCW8100
The ZXCW-series is part of the Zetex Semiconductors AcoustarTM
range of new generation digital audio devices. The ZXCW8100 is
the world's first 32-bit end-to-end direct drive digital audio
amplifier, and can be selected to work with or without dead time.
The dynamic range is 101dB, with a noise floor of
-125dB. When driving 1W in 4
,
the THD+N is 0.021%. The ZXCW8100 supports all common digital
audio input formats.
Sampling frequencies up to 192kHz are fully supported. The device
can operate in single, dual, or quad speed modes, depending upon
which sampling frequency you select. In single speed mode, Red
Book 44.1kHz CD input is oversampled up to 768 times, with a master
clock speed of 33MHz. Digital de-emphasis is also supported as
well as mixing and muting in accordance with the ATAPI CD-ROM
standard.
Other key features include user definable digital
volume control, mute, bass, and treble. The device also features
NOVALOADTM, the unique Zetex overload management system, which
can operate in several ways to modify either volume, tone, or
both, with user-definable attack and decay rates. There is a hard
mute available as well as a mute with digital silence, whereby
the output stage is set to the quiescent state.
The ZXCW8100 is controlled via a 3-wire serial peripheral
interface (SPI) from the host system controller. Device function
control is achieved by writing an 8-bit control and 64-bit data
string to internal registers within the ZXCW8100 chip. The SPI
interface is bi-directional, allowing the configuration to be
read back as required.
Multiple devices can easily be implemented by using
the SPI interface enable of each ZXCW8100. This means that in
5.1 surround systems, for example, three ZXCW8100 stereo devices
can be configured to operate together.
The device provides direct drive pulse width modulation
(PWM) two- channel stereo outputs that, via a MOSFET drive interface
with an H- bridge output stage, forms a full digital power amplifier.
Reference designs are available for typical power levels up to
60W per channel.
The 28-pin SSOP package ZXCW8100 operates from a 3.3V supply with
an operating temperature range from -40° C to +85° C.
Zetex Headquarters
Fields New Road
Chadderton, Oldham
0L9 8NP UK
(44)-161-622-4444
hq@zetex.com
US:
700 Veterans Memorial Highway
Hauppauge, NY 11788
631-360-2222
usa.sales@zetex.com
Top of Page
Analog Devices ADV202 Video CODEC
The ADV202 is a single-chip JPEG2000 codec targeted for video
and high bandwidth image compression applications that can benefit
from the enhanced quality and feature set provided by the JPEG2000
(J2K)_ISO/IEC15444-1 image compression standard. The part implements
the computationally intensive operations of the JPEG2000 image
compression standard as well as providing fully compliant code-stream
generation for most applications.
The combination of Ultra Wideband (UWB) technology
from Pulse~LINK, a leading developer of UWB communications systems,
and Analog Devices' ADV202, the only real-time high-definition
(HD) implementation of the JPEG2000 standard, drastically reduces
the visual impact of errors that occur in wireless transmission
channels, producing good image quality even in noisy environments.
While other encoder technology has proven expensive and unable
to achieve practical real-time HD video compression, JPEG2000
enables high-quality, low-latency wireless HD gaming applications,
and high-quality, low-cost wireless HD or SD (standard definition)
video distribution in the home.
In addition to the ADV202 compression engine for
handling the HD signal, the solution includes Pulse~LINK's Continuous
Wave CWave UWB architecture, which forms the foundation of a 1Gbps
UWB radio. CWave differs from other UWB technology in that its
signal derives from a narrowband frequency that is modulated to
produce a UWB signal spectrum.
Pulse~LINK's CWave UWB technology combined with
Analog Devices JPEG2000 codec solves many of the challenges associated
with implementing high QoS (quality-of-service) for streaming
HDTV wirelessly. These technologies produce a low-latency, highly
responsive interactive video gaming experience wirelessly as well
as the first lossless wireless alternative to DVI and HDMI.
ADI's JPEG2000 solutions allow the extraction, compression,
and transmission of video images at varying resolutions without
further signal processing. The JPEG2000 solution features ADI's
SURF (spatial ultra-efficient recursive filtering) wavelet technology,
enabling real-time compression and resolution scalability. This
is particularly interesting in the HD market because HD content
can be compressed once, and decompressed by multiple displays
of various resolutions. For instance, the same video source can
transmit a single stream that can be received and displayed by
an HDTV, an SDTV, and a PDA simultaneously, and each device may
process only the information it requires.
Stored, compressed video can also be reduced in
size, without decoding, by deleting some of the stored data-all
frames are still represented, but at a lower level of quality
than the original. This is attractive in DVR applications, where
programs can be initially recorded at the highest quality, but
later reduced in size to free up disk space for more compressed
content. Currently, the only HD-DVRs available are those that
are built into a set-top box product and record precompressed
video streams, since real-time HD video compression using traditional
techniques is impractical in the home.
The ADV202 offers a low-cost solution that can compress
the HD video inputs from any source in real-time with extremely
high playback quality, and provide very flexible recording capabilities.
The wavelet-based codestream also supports selective
protection of packets. In the event that the channel becomes so
noisy that some packet errors cannot be corrected, the video quality
degrades gracefully. An MPEG-2 or other temporally-compressed
video stream is considered by most audiences to be visually unacceptable
in noisy channel conditions.
The ADV202_s dedicated video port provides glueless
connection to common digital video standards such as ITU.R-BT656,
SMPTE125M, SMPTE293M [525p], ITU.R-BT1358 [625p], SMPTE274M [1080i],
or SMPTE296M [720p]. A variety of other high speed synchronous
pixel and video formats can also be supported using the programmable
framing and validation signals.
The ADV202 comes in a compact 12mm x 12mm 121-lead
CSPBGA, speed grade 115MHz; or 13mm x 13mm 144-lead CSPBGA, speed
grade 150MHz package and is available now in production quantities.
Device pricing $29.90 US (1,000-4,999 pieces)
For more information, please visit
www.analog.com/ADV202.
www.pulselink.net
Top of Page
AD8143
- High-Speed Triple Differential Receiver with Comparators
The AD8143 is a triple low cost differential-to-single-ended receiver
specifically designed for receiving RGB (red-green-blue) video
signals over twisted pair cable but can also be used for receiving
any type of analog signal or high speed data transmission. Two
auxiliary comparators are also provided to receive digital or
sync signals. You can use the AD8143 in conjunction with the AD8133
triple differential driver to provide a complete low-cost solution
for RGB over Category-5 unshielded twisted pair (UTP) cable applications
including KVM (keyboard-video-mouse).
|
The excellent common-mode rejection (70dB at 10MHz)
of the AD8143 allows for the use of low cost unshielded twisted
pair cables in noisy environments.
The AD8143 has a wide power supply range from single 5V supply
to 
12V,
which allows for a wide common-mode range. The wide common mode
input range of the AD8143 maintains signal integrity in systems
where the ground potential is several volts different between
the drive and receive ends without the use of isolation transformers.
The AD8143 is stable at a gain of 1. The closed-loop gain can
easily be set by external resistors. It has a 300MHz -3dB bandwidth
at unity gain with Vo = 1V p-p and a slew rate of 1000V/
s.
The differential input impedance is 6M
and a low noise voltage of 12nV/
Hz.
The AD8143 is available in a 5mm x
5mm 32-lead LFCSP package and is rated to work over the extended
industrial temperature range, -40°C to +85°C.
A preliminary data sheet is available at http://www.analog.com/en/prod/0,2877,AD8143,00.html
Analog Devices Inc
804 Woburn St.
Wilmington, MA 01887
(781) 937-1428
Fax (781) 937-1021
www.analog.com
Top of Page
TI
TAS5142, TAS5152
These devices are third-generation, high-performance,
integrated stereo digital amplifier power stages with an improved
protection system. The TAS5142 (100W per channel) and TAS5152
(125W/channel) digital amplifiers are capable of driving a 4
bridge-tied load with low integrated noise at the output, and
low idle power dissipation.
You can build a low-cost, high-fidelity audio system using a TI
chipset, comprising a modulator (e.g., TAS5508) and the TAS5142
or TAS5152. This system requires only a simple passive LC demodulation
filter to deliver high-quality, high-efficiency audio amplification
with proven EMI compliance. The devices require two power supplies,
at 12V for GVDD and VDD, and at 32V for PVDD. They do not require
power-up sequencing due to internal power-on reset. The efficiency
of the digital amplifier is greater than 90% into 6,
which enables the use of smaller power supplies and heatsinks.
The TAS5142 and TAS5152 have an innovative protection system integrated
on-chip, safeguarding the devices against a wide range of fault
conditions that could damage the system. These safeguards are
short-circuit protection, overcurrent protection, undervoltage
protection, and overtemperature protection. The TAS5142 has a
new proprietary current-limiting circuit that reduces the possibility
of device shutdown during high-level music transients. A new programmable
overcurrent detector allows the use of lower-cost inductors in
the demodulation output filter.
• >100dB SNR (A-weighted)
• <0.1% THD+N at 1W
• Two thermally enhanced package options:
• DKD (36-pin PSOP3)
• DDV (44-pin HTSSOP)
• High-efficiency power stage (>90%) with high efficiency,
low on-resistance 140m
output MOSFETs
• Power-on reset for protection on power-up without any power-supply
sequencing
• Integrated self-protection circuits including undervoltage,
overtemperature, overload, short circuit, and current limiting
to prevent unwanted over-current shutdowns
• Error reporting
• EMI compliant when used with recommended system design
• Intelligent gate drive
• Applications: Mini/Micro audio systems, DVD receiver, home
theater
Device pricing $ US (1k pieces)
TAS5142: $3.90
TAS5152: $4.30
Texas Instruments Semiconductor
Group
12500 TI Blvd
Dallas, TX 75243
(800) 336-5236
www.ti.com
Top of Page
AD1981-HD
The AD1981HD is used to add analog and digital high-definition
audio capabilities to computer motherboards by connecting directly
to the core logic chipset supporting the HD Audio 1.0 specification.
By re-using existing systems resources, this solution adds flexibility,
improves sound quality, reduces power consumption, and lowers
the system BOM cost by integrating components.
The AD1981HD has two DAC channels (16, 20, or 24 bit) and two
ADC channels (16 or 20 bit). HD sample rates are available from
8kHz to 48kHz with 90dB dynamic range, CD and AUX analog inputs,
and S/PDIF output with 32kHz, 44.1kHz, or 48kHz and 16, 20, or
24-bit performance. The AD1981HD uses advanced power management
modes.
The AD1981HD key features are:
flexible OS support
integrated HD audio controller
true stereo microphone capture with up
to 30dB mike boost
parametric EQ improves sound on low-
cost speakers
jack sense and port re-tasking
peripheral sensing/enumeration
EAPD for external amplifier control
analog and digital PC BEEP
drivers for: W2K, WINXP, W2K3, XP-64,
W2K3-64; WHQL pre-qualified
BOM cost savings, more flexibility, and
better audio quality
Device pricing $3.61 US (1000-4999 pieces)
Analog Devices Inc
804 Woburn St.
Wilmington, MA 01887
(781) 937-1428
Fax (781) 937-1021
www.analog.com
Top of Page
Cirrus
Logic CS42L51 CODEC
The Cirrus Logic CS42L51 is a highly integrated stereo CODEC that
is said to be ideal for portable low-power audio applications.
The CS42L51 delivers 24-bit, 96kHz audio performance and provides
maximum battery life while operating from a 1.8V power supply.
Power consumption is a low 12mW at 1.8V while delivering 46mW
into 16
headphones. The chip is based on a multi-bit Delta-Sigma architecture
that allows infinite sample rate adjustments between 4kHz and
100kHz.
The CS42L51 generates its own on-chip negative power supply voltage,
thus providing ground-centered outputs and eliminating costly,
space-consuming coupling and blocking capacitors.
Applications include hard-disc and flash-based portable audio
players, guitar effects pedals, portable audio recorders, personal
media players, and other low-power and portable audio applications.
For complete specifications and to register for free samples,
visit the Cirrus Logic website.
Device pricing: $3.95 (1k pieces), 32-QFN 5mm ´ 5mm package
Cirrus Logic, Inc.
2901 Via Fortuna
Austin, TX 78746
(800) 888-5016
www.cirrus.com
Top of Page
Analog
Devices AD1940
and AD1941 SigmaDSP Audio Processors
SigmaDSP Digital Audio enables use of a fully programmable audio
DSP that is easily configurable through the SigmaStudio Graphical
Development Tool. The first-generation Analog Devices SigmaDSP
products, including the AD1953, combine three high-performance
audio DACs with a powerful DSP core. The second-generation parts,
the AD1940 and AD1941, feature higher processing power with more
I/O channels.
The new AD1940 and AD1941 SigmaDSP, together with
SigmaStudio, provide a fully automated hardware and software system
design tool in order to implement higher quality DSP audio processing
capabilities into more designs.
The SigmaDSP audio processor is a cost-effective
way to migrate analog sound processing tasks to the digital domain.
SigmaDSP allows audio engineers to design in more digital audio
features without exceeding budgets.
The AD1940 and AD1941 SigmaDSP audio processors
feature a 28-bit core running at 75MHz with 16-channel I/O. This
is enough to process conventional 24-bit audio signals with the
headroom to accommodate sound-enhancing features such as bass
compensation. This flexibility produces a richer audio experience,
particularly in space-constrained products such as flat panel
televisions or multimedia PCs, where a restricted form factor
prevents the use of large speakers and subwoofers.
The comprehensive post-processing functions of the
AD1940 and AD1941 include tone and distortion control and a 120ms
delay-pool that provide audio systems engineers with a broad range
of design options. In an automotive sound system, the SigmaDSP
enables car makers to equip their vehicles with multiple speakers
that can be professionally equalized for maximum sound quality.
In a set-top box or home theater system, audio delays can be added
to ensure the audio signal is synchronized to compensate for video
frame delays.
SigmaStudio Design Tool Simplifies Digital Audio
Design
SigmaStudio provides a larger portfolio of graphical programming
tools for digital sound processing applications, complementing
ADI's VisualAudio graphical design and development environment
for the SHARC Processors.
Audio systems engineers can tap the full capabilities
of the AD1940 and AD1941 SigmaDSPs by using the SigmaStudio, a
new graphical DSP design tool. Requiring no DSP programming knowledge,
SigmaStudio employs a user-friendly "drag and drop"
interface that allows designers to easily build multi-channel
digital audio platforms by selecting from a library of audio function
blocks, including volume controls, crossover and equalizer filters,
and professional-grade dynamic processors. SigmaStudio also enables
the easy implementation of industry-standard licensed algorithms,
such as SRS TruSurroundXT, Waves MaxxBass, or Dolby Prologic-II.
The SigmaStudio's ease-of-use allows analog audio engineers and
digital designers to reduce development time and cost and still
deliver premium sound quality for high-volume applications.
Engineers can then use SigmaStudio to compile the
SigmaDSP application, generate production-ready code, and then
adjust and control signal parameters in real time. The proprietary
architectures of the SigmaDSP core and the SigmaStudio design
tool allow the code-efficiency of the compiled SigmaDSP programs
to reach 100%.
The AD1940YSTZ, featuring an SPI control interface,
and the AD1941YSTZ with its I2C control interface, are available
in a lead-free 48-pin LQFP (low-profile quad flat pack) package
for $5.96 per unit in 10,000-unit quantities. The devices meet
the automotive industry's extended temperature range specification
of -40º C to 105º C. Evaluation boards for both devices,
including the SigmaStudio design tool, are available for $499.
Analog Devices Inc.
804 Woburn St., Wilmington, MA 01887
781-937-1428; Fax 781-937-1021
www.analog.com/sigmadsp
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Monolithic
Power MP7720 Class D Amp
Monolithic Power Systems Class D Audio Amplifier ICs provide
high power, high efficiency audio solutions at low cost. The proprietary
circuit topology with integrated Power MOSFETs provides Class
AB sound quality with Class D efficiency, and the family of audio
products can achieve 30W power output in SOIC packages without
additional heatsink requirements.
The MP7720 is a 5W-20W, Class D mono single-ended
audio amplifier that integrates 180m
power MOSFETs along with startup/shutdown pop elimination, thermal
and short circuit protection, and mute/standby functions in a
single device. The single-ended output structure can deliver 20W
into 4
loads (VDD = 24V) with 90% efficiency and THD+N of 0.04% with
the required external LC low-pass output filter.
The MP7720 is based on a proprietary variable frequency
topology and patented Analog Adaptive Modulation that is said
to deliver excellent PSRR, fast response time, low noise
(190V typical),
and single-supply operation of 9.5 to 24V DC. Gain is adjustable
from 15dB to 30.4dB by means of external resistors. The optimum
quiescent idle frequency is 600kHz to 700kHz.
The MP7720 is available in SOIC8 and PDIP8 packages.
A stereo evaluation board (EV0030) is available with two 20W MP7720
chips on board. Data sheets and application notes are available
on the website.
MPS US Corporate Headquarters
983 University Avenue, Building A, Los Gatos, CA 95032 USA
408-357-6600; Fax: 408-357-6601
www.monolithicpower.com
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Silicon
Labs Si4700 FM Tuner IC
The Si4700/01 from Silicon Labs integrates the entire
tuner function from antenna interface to audio output for stereo
FM broadcast radio reception.
This FM radio tuner IC family is the industry's
first to leverage digital integration and 100% CMOS process technology,
resulting in a completely integrated FM tuner that requires only
one external supply bypass capacitor and less than 20mm²
of board space. Offering unmatched integration, the Si4700/01
allows FM radio reception to be added to a variety of portable
devices where board space, performance, low power consumption,
and ease of use are essential.
Leveraging Silicon Laboratories' proven Aero digital
low intermediate frequency (low-IF) receiver architecture and
frequency synthesizer technology, the Si4700/01 delivers superior
RF performance and interference rejection. Digital signal processing
is utilized to provide optimum sound quality with varying reception
conditions. The Si4700/01 uses a streamlined programming model,
which further reduces product development time. Power management
is also simplified with an integrated regulator allowing direct
connection to a 2.7 to 5.5V battery.
The radio chip uses the common I and Q datapaths
with mixers, a low 128kHz IF with internal filter, an ADC, DSP
filtering and demodulation, and DACs that drive the external power
amplifiers. You can implement the FM antenna by headphone cables
or a discrete FM dipole.
The devices integrate numerous functions such as AGC, AFC, seek
tuning, mono/stereo audio output, selectable de-emphasis, adaptive
noise canceling, volume control, and bass boost.
The Si4701 incorporates a digital processor for the European Radio
Data System (RDS) and the US Radio Broadcast Data System (RBDS)
including all required symbol decoding, block synchronization,
error detection, and error correction functions. Using this feature,
the Si4701 enables data such as station identification and song
name to be displayed to the user.
Device pricing in the 4 x
4mm QFN package for 10k pieces is $3.00 (Si4700) or $3.45 (Si4701).
Silicon Laboratories
4635 Boston Lane, Austin, TX 78735
512-416-8500; Toll-Free 877-444-3032; Fax 512-464-9444
www.silabs.com
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Target applications include Automotive Amplifiers,
Flat Panel Televisions, PC Audio Systems, and other Audio Components.
The chip requires separate 5V supplies for the analog
and digital sections, and 8 to 20V for the output power section.
Data sheets are available on the ADI website.
Contact the Analog Devices Audio Amplifier Development
Group for samples, availability, and additional technical information.
Device pricing (1k pieces): $2.90 (AD1990) to $6.72 (AD1996)
Analog Devices Inc.
www.analog.com
These ICs incorporate patented circuitry that significantly improves
over the noise- and interference-canceling ability of other integrated
solutions.” THAT’s InGenius IC family is now available
in surface mount and through-hole packages, in three different gain
options to suit specific applications. According to Denise Waterhouse,
Sales/Marketing Manager, all six versions are now available from
stock.
THAT’s Chief Technical Officer, Gary Hebert,
offered some details: “Conventional balanced line receivers
must be driven by perfectly matched source impedances in order to
effectively reject hum and interference in audio systems. It’s
easy to sustain ideal conditions in the lab, but in the real world,
audio outputs, cables, and connectors are subject to all sorts of
imperfections that cause impedance mismatches. You just don’t
get lab conditions at a concert!”
THAT’s InGenius line receivers use technology developed and
patented by Bill Whitlock, President of Jensen Transformers. He
explained, “My design is almost completely insensitive to the
source impedance imbalances which overwhelm typical balanced input
stages. InGenius line receivers act like a transformer to present
an extremely high input impedance to common mode (noise) signals.
Even with a 600W source-impedance imbalance, the InGenius topology
delivers 70dB typical common mode rejection. No other solid-state
input stage can deliver that performance!”
A paper co-authored by Bill Whitlock and Fred Floru entitled “New
Balanced-Input Integrated Circuit Achieves Very High Dynamic Range
in Real-World Systems” is available from the AES as Convention
Paper 6261.
Audio performance for the THAT 1200-series is uniformly high, with
12V/ms slew rate, 20MHz gain-bandwidth product, and 0.0005% audio-band
THD. The InGenius 1200 family is available in three different gains—0,
–3, and –6dB—to match different customer requirements.
THAT Corp. says the –3dB version represents the optimum tradeoff
between noise and headroom for real-world applications.”
The 1200-series are made using THAT’s proprietary dielectric
isolation (DI) process in the company’s Milpitas, Calif., fabrication
facility. Tyler said that, due to the DI process’ ability to
deliver discrete device performance, “these parts sound like
discrete designs, but with the size, reliability, and convenience
of ICs.”
Priced at $2.87 (1k) in an 8-pin SO package, the InGenius THAT 1200-series
is claimed to be a superior alternative to all other line receivers.
For more information, visit the 1200-series page or contact:
The VSP can handle all broadband applications of digital
signal processing that require the data-technical filter and algorithms
that provide high processing power. The VSP provides the advantages
of a System on Chip (SoC) compliant and programmable core, and is
the basis for the entire product family.
The VSP-based MPEG IP generates entire product families
on the fundamental of one identical architecture configured to provide
tailored solutions. The added benefit is the increased productivity
due to the design of a complete product portfolio.
1. FIR Filter and LMS Adaptive FIR
Filter:
• maximum clock frequency: 200MHz.
• adjustable fixed-point tap accuracy: 8, 16, 24, 32 bits.
• adjustable fixed-point coefficient accuracy: 8, 16, 24, 32
bits.
• accumulator precision up to 80 bits,
IEEE balanced rounding algorithm.
2. Complex Radix 2 FFT/IFFT:
• 200MHz maximum clock frequency
• adjustable fixed-point precision: 8, 16, 24, 32 bits
3. Generic Viterbi Decoder:
• Adjustable fixed point accuracy: 8, 16, 24, 32 bits.
• Number of states only limited by trellis memory slice.
• Adjustable trellis depth to match decision delay constraints.
• 8-stage pipelined operation.
• Metric calculation and minimum search works parallel to trace-back
operation of previous symbol-cycle. e.g., 8 processing elements
and 512 State G.SHDSL Viterbi (3-bit symbols): 128 clock cycles
per symbol decision yields
4.6875 MBits/sec data rate.
5. LDPC decoder (low density parity
check):
• 200MHz operation.
• For 32 processing elements up to 50MBits data rate (for average
number of 10 iterations per code word).
The devices have IC Max ratings of 15A and a VCEO(sus)
of 230V, in a TO264 five-lead package. The hFE ranges from 30 to
200 with an fT Min of 30MHz.
The NPN device is NJL3281D and the PNP device is NJL1302D.
The ThermalTrak family of devices has been designed to eliminate
thermal equilibrium lag time and bias trimming in high-fidelity
consumer audio products and professional audio amplifiers. You can
also use them in other applications as transistor die protection
devices.
Features include:
Device pricing $2.75 (10k pieces). ThermalTrak transistors
with 150W and 250W ratings are scheduled to follow. Data sheets
and Application Notes are available on the website
