ADAU1781BCPZ-RL datasheet(1/88 Pages) AD

Teilenummer	ADAU1781BCPZ-RL

Bauteilbeschribung	Low Noise Stereo Codec with SigmaDSP Processing Core

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Low Noise Stereo Codec with

SigmaDSP Processing Core

ADAU1781

FEATURES

24-bit stereo audio ADC and DAC

400 mW speaker amplifier (into 8 Ω load)

Programmable SigmaDSP audio processing core

Wind noise detection and filtering

Enhanced stereo capture (ESC)

Dynamics processing

Equalization and filtering

Volume control and mute

Sampling rates from 8 kHz to 96 kHz

Stereo pseudo differential microphone input

Optional stereo digital microphone input pulse-density

modulation (PDM)

Stereo line output

PLL supporting a range of input clock rates

Analog and digital I/O 1.8 V to 3.3 V

Software control via SigmaStudio graphical user interface

Software-controllable, clickless mute

Software register and hardware pin standby mode

32-lead, 5 mm × 5 mm LFCSP

APPLICATIONS

Digital still cameras

Digital video cameras

GENERAL DESCRIPTION

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.

FUNCTIONAL BLOCK DIAGRAM

PGA

LEFT

ADC

RIGHT

ADC

LEFT

DAC

RIGHT

DAC

PGA

BEEP

PDN

MICBIAS

LMIC/LMICN/

MICD1

LMICP

RMIC/RMICN/

MICD2

RMICP

AOUTL

AOUTR

SPP

SPN

PLL

SigmaDSP CORE

WIND NOISE

NOTCH FILTER

EQUALIZER

DIGITAL VOLUME

CONTROL

DYNAMIC

PROCESSING

OUTPUT

MIXER

REGULATOR

SERIAL DATA

INPUT/OUTPUT PORTS

I2C/SPI

CONTROL PORT

ADAU1781

MICROPHONE

BIAS

Figure 1.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother

rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

Fax: 781.461.3113

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