Стереофонический аудиокодек SigmaDSP с низким шумом для портативных устройств
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ADAU1781 - это 24-разрядный стереофонический аудиокодек с малым энергопотреблением. Обладающие низким уровнем шумов ЦАП и АЦП поддерживают работу с частотами дискретизации от 8 кГц до 96 кГц. Благодаря малому потребляемому току и режимам энергосбережения ADAU1781 идеально подходит для задач обработки звука в системах с питанием от батарей.

Программируемое ядро SigmaDSP® обеспечивает расширенные возможности обработки при записи и воспроизведении сигналов для повышения общего качества звучания.

Тракт записи включает в себя два входа цифровых стереомикрофонов и входной каскад аналоговых стереофонических сигналов. Аналоговые входы могут быть сконфигурированы для работы с источниками псевдодиффенциальных или несимметричных стереофонических сигналов. Отдельный входной сигнал аналогового зуммера может быть микширован с любым аналоговым выходным сигналом. Кодек ADAU1781 имеет линейный стереовыход и драйвер динамиков.

Последовательный интерфейс управления поддерживает протоколы I2C® или SPI, а последовательный порт ввода-вывода аудиосигналов может быть программно настроен для работы в режиме I2S, с выравниванием по левому полю, с выравниванием по правому полю или с временным мультиплексированием (TDM). Программируемая схема ФАПЧ обеспечивает большую свободу в формировании тактовых сигналов любых стандартных частот; частота задающего тактового сигнала может составлять от 11 МГц до 20 МГц.

Области применения

  • Цифровые фотокамеры
  • Цифровые видеокамеры

Статус продукта

checked Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits

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Product Details

Full-featured ADAU1781 SigmaDSP evaluation board that operates all functions of the ADAU1781 with a full range of analog and digital inputs and outputs including digital microphones and capless headphones. MEMS microphones and a speaker are included on the PCB. USBi is included in the package and it can provide the 5 V power supply for the board.

Product Details

The Analog Devices USBi “USB Interface” (EVAL-ADUSB2EBZ) board is the interface between your PC's USB port and SigmaDSP hardware's data input pins. This interface can be used with any evaluation board which includes an External SPI/I²C header (Aardvark Header). The EVAL-ADUSB2EBZ board is capable of both SPI and I²C communication (which is user selectable) and can supply IOVDD of either 3.3V or 1.8V.The USBi interface is powered from the computer's USB port.

To Install the USBi Board:
  • Connect the USB cable to the USBi Board a spare USB port on your PC.
  • The Windows “Found New Hardware Wizard” will launch.
  • Choose “Install from a list or a specific location” and click “Next”.
  • Select “Search for the best driver in these locations” and Check the box for “Include this location in the search.”
  • Press the “Browse” button and locate the appropriate driver file in the SigmaStudio application folder (default folder is C:\Program Files\Analog Devices Inc\Sigma Studio\USB drivers): Select the CyUSB.inf file.
  • Click “Continue Anyway” if you're prompted with “This software has not passed Windows Logo testing.”
Using USBi in SigmaStudio:
To communication between SigmaStudio and the USBi board, a communication channel block must be added to the Schematic design. To locate the block, select the Hardware Configuration Tab, int the ToolBox or Tree ToolBox window choose the “Communication Channels” category, and select the USBi block.


This block provides connections for multiple processors (ICs / DSPs), allowing you to use multiple processors in a single design. This block allows you to explicitly specify both the communication protocol (SPI or I²C) and the part's address, I²C address or SPI clatch line. The DSP hardware's address must match the block's selected address for communication to function properly. See the parts data sheet for more information about addressing (e.g. ADR_SEL, ADDR0, or ADDR1 pins). The default USBi protocol is I²C, to enable SPI, you must first select an SPI address in the block's drop down menu and then perform three write operations (e.g. press the write button the Register Read/Write Window 3 times). The USBi hardware has LEDs which indicate the current mode, I²C or SPI.

Software & Systems Requirements


Software Development Tools

Tools & Simulations

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Product Recommendations

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ADAU1781 Сопутствующие компоненты

Recommended Analog Output Microphones

Recommended Digital Output Microphones

  • For low cost, low power, PDM (Pulse Digital Modulated) output , we recommend the ADMP421 or the ADMP521 .

Design Resources

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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.

ADAU1781 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints



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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.