GENERAL DESCRIPTION

The ADAU1761 is a low power, stereo audio codec with integrated digital audio processing that supports stereo 48 kHz record and playback at 14 mW from a 1.8 V analog supply. The stereo audio ADCs and DACs support sample rates from 8 kHz to 96 kHz as well as a digital volume control.

The SigmaDSP® core features 28-bit processing (56-bit double precision). The processor allows system designers to compensate for the real-world limitations of microphones, speakers, amplifiers, and listening environments, resulting in a dramatic improvement in the perceived audio quality through equalization, multiband compression, limiting, and third-party branded algorithms.

FEATURES

SigmaDSP 28-/56-bit, 50 MIPS digital audio processor

Fully programmable with SigmaStudio graphical tool

24-bit stereo audio ADC and DAC: >98 dB SNR

Sampling rates from 8 kHz to 96 kHz

Low power: 7 mW record, 7 mW playback, 48 kHz at 1.8 V

6 analog input pins, configurable for single-ended or differential inputs

Flexible analog input/output mixers

Stereo digital microphone input

Analog outputs: 2 differential stereo, 2 single-ended stereo, 1 mono headphone output driver

PLL supporting input clocks from 8 MHz to 27 MHz

Analog automatic level control (ALC)

Microphone bias reference voltage

Analog and digital I/O: 1.8 V to 3.65 V

I2C and SPI control interfaces

Digital audio serial data I/O: stereo and time-division multiplexing (TDM) modes

Software-controllable clickless mute

Software power-down

GPIO pins for digital controls and outputs

32-lead, 5 mm × 5 mm LFCSP

−40°C to +85°C operating temperature range

APPLICATIONS

Smartphones/multimedia phones

Digital still cameras/digital video cameras

Portable media players/portable audio players

Phone accessories products