WM9708 datasheet(1/28 Pages) WOLFSON

部件名	WM9708

功能描述	AC97 Revision 2.1 Audio Codec

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制造商	WOLFSON [Wolfson Microelectronics plc]

网页	http://www.wolfsonmicro.com

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WM9708

AC’97 Revision 2.1 Audio Codec

Advanced Information, April 2001, Rev 2.0

WOLFSON MICROELECTRONICS LTD

Bernard Terrace, Edinburgh, EH8 9NX, UK

Tel: +44 (0) 131 667 9386

Fax: +44 (0) 131 667 5176

Email: sales@wolfson.co.uk

www.wolfsonmicro.com

Advanced Information data sheets contain

preliminary data on new products in the

preproduction phase of development.

Supplementary data will be published at a

later date.

2001 Wolfson Microelectronics Ltd

.

DESCRIPTION

WM9708 is a high-quality stereo audio codec compliant with

the AC’97 Revision 2.1 specification. It performs full duplex

18-bit codec functions and supports variable sample rates

from 8 to 48k samples/s and offers excellent quality with

high

SNR.

Additional

features

include

3D

sound

enhancement, line-level outputs, and hardware sample rate

conversion.

The WM9708 is fully operable on 3.3V or 5V or mixed

3.3/5V supplies, and is packaged in a 28-pin SSOP

package.

AC’97 FEATURES

•

18-bit stereo codec

•

S/N ratio > 95dB

•

Multiple stereo input mixer

•

Mono and stereo volume control

•

Power management features

•

Very low standby power

•

Variable rate audio (VRA) support

•

Analogue 3D stereo enhancement

•

Line level outputs

•

Supports Rev. 2.1 specified audio and modem sample

rates and filtering

•

PC-beep connection when device held reset

•

3.3V or 5V operation

•

28-pin SSOP package

BLOCK DIAGRAM

VOL/

MUTE

VOL/

MUTE

VOL/

MUTE

Σ

VOL/

MUTE

Σ

(26) MONOOUT

(25,56) LINEOUT

Σ

CD (13,15)

LINEIN (17,18)

PCBEEP (12)

MIC1 (16)

0dB/

20dB

(7) BITCLK

(10) SYNC

(9) SDATAIN

(6) SDATAOUT

OSC

(4) XTLIN

(5) XTLOUT

VOL/

MUTE

STEREO

DAC

SRC

Σ

VOL

STEREO

ADC

SRC

VOL/

MUTE

MUX

VOL/

MUTE

MUX

KEY:

MONO

STEREO

RECORD

MUX

AND

MUTE

SERIAL

I/F

VOL/

MUTE

(11) RESETB

WM9708

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