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.

Product Details

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.


  • Digital still cameras
  • Digital video cameras

Product Lifecycle icon-recommended Last Time Buy

All products in this family will be obsolete soon. Please contact ADI Sales or Distributors to arrange for final purchases and read our Obsolescence Information to review the time periods for placing final orders and receiving final shipments.

Evaluation Kits (2)

Software & Systems Requirements

Software Development Tools

Tools & Simulations

Product Recommendations

ADAU1781 Companion Parts

Recommended Analog Output Microphones

Recommended Digital Output Microphones

  • For low cost, low power, PDM (Pulse Digital Modulated) output: ADMP421, ADMP521.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information


ADAU1781 Discussions

RE: ADAU1781
7 week(s) ago in Processors and DSP
RE: Can ADAU1781 Support Echo Cancellation
7 week(s) ago in SigmaDSP Processors and SigmaStudio Development Tool
RE: EVAL-ADAU1781 no sound
7 week(s) ago in Audio
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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.

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Evaluation Boards Pricing displayed is based on 1-piece.
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.