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Home > Embedded ICs > Embedded - Digital Signal Processors & Controllers (DSP, DSC) > ADAU1442YSVZ-3A-RL

Analog Devices ADAU1442YSVZ-3A-RL

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ADAU1442YSVZ-3A-RL Overview

The flexible audio routing matrix (FARM) allows the user to multiplex inputs from multiple sources running at various sample rates to or from the SigmaDSP core. This drastically reduces the complexity of signal routing and clocking issues in the audio system. FARM includes up to eight stereo asynchronous sample rate converters (depending on the device model), Sony/ Philips Digital Interconnect Format (S/PDIF) input and output, and serial (I2S) and time division multiplexing (TDM) I/Os. Any of these inputs can be routed to the SigmaDSP core or to any of the asynchronous sample rate converters (ASRCs). Similarly, any one of the output signals can be taken from the SigmaDSP core or from any of the ASRC outputs. This routing scheme, which can be modified at any time via control registers, allows for maximum system flexibility.

The ADAU1442, ADAU1445, and ADAU1446 differ only in ASRC functionality and packaging. The ADAU1442/ADAU1445 contain 16 channels of ASRCs and are packaged in TQFP packages, whereas the ADAU1446 contains no ASRCs and is packaged in an LQFP. The ADAU1442 can handle nine clock domains, the ADAU1445 can handle three clock domains, and the ADAU1446 can handle one clock domain.

The ADAU1442/ADAU1445/ADAU1446 can be controlled in one of two operational modes: the settings of the chip can be loaded and dynamically updated through the SPI/I2C® port, or the DSP can self-boot from an external EEPROM in a system with no microcontroller. There is also a bank of multipurpose (MP) pins that can be used as general-purpose digital I/Os or as inputs to the 4-channel auxiliary control ADC.

The ADAU1442/ADAU1445/ADAU1446 are supported by the SigmaStudio graphical development environment. This software includes audio processing blocks such as FIR and IIR filters, dynamics processors, mixers, low level DSP functions, and third-party algorithms for fast development of custom signal flows.

Applications

  • Automotive audio processingHead unitsNavigation systemsRear-seat entertainment systemsDSP amplifiers (sound system amplifiers)
  • Commercial audio processing

Data Sheet, Rev. B, 04/10

Features

  • Fully programmable audio digital signal processor (DSP) for enhanced sound processing
  • Features SigmaStudio™, a graphical programming tool for development of custom signal flows
  • 172 MHz SigmaDSP core; 3584 instructions/sample @ 48 kHz
  • 4k Parameter RAM, 8k Data RAM
  • Flexible Audio Routing Matrix (FARM) - stereo S/PDIF Rx/Tx, 8 stereo asynchronous sample rate converters (from 1:8 up to 7.75:1 ratio and 139 dB DNR)
  • Supports 24 channels of serial and TDM I/O, up to fs = 192 kHz
  • PLL for generating core clock from common audio clocks
  • Pool of 170 ms digital audio delay (@ 48 kHz)
  • See data sheet for additional information

Applications

SigmaDSP?

Product Parameter

  • Clock Rate 172MHz

  • Operating Temperature -40℃ ~ 105℃ (TA)

  • Type Sigma

  • Package / Case 100-TQFP Exposed Pad

  • Voltage - Core 1.80V

  • Voltage - I/O 3.30V

  • Mounting Type Surface Mount

  • Interface I2C, SPI

  • Supplier Device Package 100-TQFP-EP (14x14)

  • On-Chip RAM 46kB

Circuit Diagram

ADAU1442

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