ADAU1442 SigmaDSP® Digital Audio Processor with Flexible Audio Routing Matrix

The ADAU1442/ADAU1445/ADAU1446 are enhanced audio processors that allow full flexibility in routing all input and output signals. The SigmaDSP® core features full 28-bit processing (56-bit in double-precision mode), synchronous parameter loading for ensuring filter stability, and 100% code efficiency with the SigmaStudio™ tools. This DSP allows system designers to compensate for the real-world limitations of speakers, amplifiers, and listening environments, resulting in a dramatic improvement of the perceived audio quality through speaker equalization, multiband compression, limiting, and third-party branded algorithms.

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 processing Head units Navigation systems Rear-seat entertainment systems DSP amplifiers (sound system amplifiers)
  • Commercial audio processing

Data Sheet, Rev. B, 04/10

Features and Benefits
  • 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
Processors & DSP
Audio & Video Products
ADAU144x IBIS Models
Data Sheets
Documentnote
ADAU1442/ADAU1445/ADAU1446: SigmaDSP Digital Audio Processor with Flexible Audio Routing Matrix Data Sheet (Rev. D)
ADAU1442/ADAU1445/ADAU1446: SigmaDSP Digital Audio Processor with Flexible Audio Routing Matrix Anomaly Sheet (Rev 0, 03/2011)
PDF 968 kB
Application Notes
Documentnote
AN-951: Using Hardware Controls with SigmaDSP GPIO Pins (Rev. A)PDF 439 kB
AN-1006: Using the EVAL-ADUSB2EBZ (Rev. A)PDF 349 kB
User Guides
Documentnote
UG-032: Evaluation Board User Guide for ADAU1442, ADAU1445, and ADAU1446 SigmaDSP ProductsPDF 1828 kB
Frequently Asked Questions
Documentnote
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
ADAU1442YSVZ-3A Production100 ld TQFP w/ 6.1mm exposed padOTH 90-40 to 105C10.728.58Y
ADAU1442YSVZ-3A-RL Production100 ld TQFP w/ 6.1mm exposed padREEL 1000-40 to 105C08.58Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-ADAU1442EBZEvaluation Board599Y
EVAL-ADUSB2EBZUSB Interface80Y
ADAU1442/ADAU1445/ADAU1446: SigmaDSP Digital Audio Processor with Flexible Audio Routing Matrix Data Sheet (Rev. D) adau1445
ADAU1442/ADAU1445/ADAU1446: SigmaDSP Digital Audio Processor with Flexible Audio Routing Matrix Anomaly Sheet (Rev 0, 03/2011) adau1445
ADAU1445/ADAU146:SigmaDSP数字音频处理器,内置灵活的音频路由矩阵 (Rev. C) adau1445
ADAU1442-3b.ibs (All Speed Grades) adau1445
AN-951: Using Hardware Controls with SigmaDSP GPIO Pins (Rev. A) adau1701
AN-1006: Using the EVAL-ADUSB2EBZ (Rev. A) ad1938
AN-951: 使用SigmaDSP内置 GPIO引脚进行硬件控制 (Rev. A) adau1701
UG-032: Evaluation Board User Guide for ADAU1442, ADAU1445, and ADAU1446 SigmaDSP Products adau1445