ADAU1381

Obsolete

Low-noise Stereo Codec with Enhanced Recording and Playback Processing

Data Sheet (Rev. B)

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Part Details

Built-in sound engine for audio processing
Wind noise reduction filter
Enhanced Stereo Capture (ESC)
Dual-band automatic level control (ALC)
6-band equalizer, including notch filter
24-bit stereo audio ADC and DAC
400 mW speaker amplifier (into 8 Ω load)

Stereo digital microphone input pulse-density modulation (PDM)
PLL supporting a range of input clock rates
Stereo line output
Stereo pseudo-differential microphone input

Documentation

Data Sheet 1

ADAU1381: Low Noise Stereo Codec with Enhanced Recording and Playback Processing Data Sheet (Rev.B) 01/21/2011

User Guide 1

UG-030: Using the ADAU1381 Sound Engine 11/20/2009

This is the most up-to-date revision of the Data Sheet.

Software Resources

Device Drivers 1

ADAU1781 Sound CODEC GitHub Linux Driver Source Code (I²C)

Hardware Ecosystem

Parts	Product Life Cycle	Description
Audio Amplifiers 6
ADMP401	Obsolete	Omnidirectional Microphone with Bottom Port and Analog Output
ADMP404	Obsolete	Omnidirectional Microphone with Bottom Port and Analog Output
ADMP405	Obsolete	Omnidirectional Microphone with Bottom Port and Analog Output
ADMP504	Obsolete	UltraLow Noise Microphone with Bottom Port and Analog Output

ADMP421	Obsolete	iMEMS^® Microphone Omni Directional Microphone with Bottom Port and Digital Output
ADMP521	Obsolete	Ultra-Low Noise Microphone with Bottom Port and PDM Digital Output

Evaluation Kits

ADUSB2EBZ Evaluation Board

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Features and Benefits

EVAL-ADUSB2EBZ "USBi"

Digital I/O: USB input, I2C/SPI output
DC Supply: 5 V (USB)

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, in 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 catch 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.

ADAU1381 Evaluation Board

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Product Details

This evaluation board provides full access to all analog and digital I/Os on the ADAU1781. The SigmaDSP is controlled by Analog Devices, Inc., SigmaStudio™ software, which interfaces to the board via a USB connection. This evaluation board can be powered either over the USB bus or by a single 3.8 V to 6 V supply, which is regulated to the voltages required on the board. The PC board is a 4-layer design, with a single ground plane and a single power plane on the inner layers. The board contains onboard microphones and speaker, and connectors for external microphones and speaker. The master clock can be provided externally or by the on-board 12.288 MHz active oscillator.