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a

AD1887

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

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2001

ENHANCED FEATURES

Full Duplex Variable Sample Rates from 7040 Hz to

48 kHz with 1 Hz Resolution

External Power Amp

Split Power Supplies (3.3 V Digital/5 V Analog)

Mobile Low-Power Mixer Mode

Extended 6-Bit Headphone Volume Control

Digital Audio Mixer Mode

AC’97 2.1 FEATURES

Variable Sample Rate Audio

AC’97 FEATURES

AC’97 2.2 Compliant

Greater than 90 dB Dynamic Range

Integrated Stereo Headphone Amplifier

Multibit

-

Converter Architecture for Improved S/N

Ratio Greater than 90 dB

16-Bit Stereo Full-Duplex Codec

Two Analog Line-Level Stereo Inputs for:

LINE-IN and CD

Mono MIC Input with Built-In Programmable Preamp

High-Quality CD Input with Ground Sense

Power Management Support

48-Terminal TQFP Package

FUNCTIONAL BLOCK DIAGRAM

OSCILLATOR

XTL_OUT

XTL_IN

SAMPLE

RATE

GENERATORS

PGA

PGA

16-BIT

-

A/D

CONVERTER

16-BIT

-

A/D

CONVERTER

16-BIT

-

A/D

CONVERTER

GA

M

MIC

PREAMP

M

GA

M

GA

M

GA

M

GA

M

GA

GA

M

16-BIT

-

A/D

CONVERTER

M

M

GA

M

HP

GA

M

HP

CHIP SELECT

AD1887

SDATA_IN

SDATA_OUT

BIT_CLK

SYNC

RESET

ID0

ID1

MIC

LINE_IN

CD

HP_OUT_L

HP_OUT_R

G = GAIN

A = ATTENUATE

M = MUTE

AC

LINK

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