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ADAU1781:  SigmaDSP Low-noise Stereo Audio Codec for Portable Applications

Product Details

Product Status:Recommended for New Designs

The ADAU1781 is a low power, 24-bit stereo audio codec. The low noise DAC and ADC support sample rates from 8 kHz to 96 kHz. Low current draw and power saving modes make the ADAU1781 ideal for battery-powered audio applications.

A programmable SigmaDSP® core provides enhanced record and playback processing to improve overall audio quality.

The record path includes two digital stereo microphone inputs and an analog stereo input path. The analog inputs can be configured for either a pseudo differential or a single-ended stereo source. A dedicated analog beep input signal can be mixed into any output path. The ADAU1781 includes a stereo line output and speaker driver, which makes the device capable of supporting dynamic speakers.

The serial control bus supports the I2C® or SPI protocols, and the serial audio bus is programmable for I2S, left-justified, right-justified, or TDM mode. A programmable PLL supports flexible clock generation for all standard rates and available master clocks from 11 MHz to 20 MHz.

Applications

  • Digital still cameras
  • Digital video cameras

FEATURES and BENEFITS

  • Programmable SigmaDSP core for audio processing
  • 24-bit stereo audio ADC and DAC
  • 400 mW speaker amplifier (into 8 Ω load)
  • Optional stereo digital microphone input pulse-density modulation (PDM)
  • PLL supporting a range of input clock rates
  • Stereo pseudo-differential microphone input
  • Stereo line output
  • Please see data sheet for additional features.

Functional Block Diagram for ADAU1781

Documentation

Title Content Type File Type
ADAU1781: Low Noise Stereo Codec with SigmaDSP Processing Core (Rev B, 01/2011) (pdf, 937 kB) Data Sheets PDF
AN-951: Using Hardware Controls with SigmaDSP GPIO Pins  (pdf, 439 kB) Application Notes PDF
AN-1056: Capless Headphone Virtual Ground Short-Circuit Protection for the ADAU1361 and ADAU1761 Low Power Codecs  (pdf, 77 kB) Application Notes PDF
AN-1006: Using the EVAL-ADUSB2EBZ  (pdf, 349 kB) Application Notes PDF
Sigma Studio Overview
Familiar audio processing blocks can be wired together as in a schematic, and the compiler generates DSP-ready code and a control surface for setting and tuning parameters.
Videos HTML
VisualDSP++ 5.0 Linker and Utilities Manual (Revision 3.5, January 2011)  (pdf, 2290 kB) | Request a CD Software Manuals PDF
UG-177: Evaluating the ADAU1781 SigmaDSP using the EVAL-ADAU1781Z  (pdf, 1220 kB) User Guides PDF
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Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADAU1781 Sound CODEC Linux Driver Device Drivers HTML
Firmware Loader for SigmaDSPs Device Drivers HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Product Recommendations & Reference Designs

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Price, packaging, availability

Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADUSB2EBZ Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADUSB2EBZ Status: Production USB Interface $80.00 Yes -
ADAU1781 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADAU1781Z Status: Production Evaluation Board $249.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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