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WM9701A

Low Power AC鈥?7 Multimedia Audio Codec

Production Data, January 2001, Rev 3.2

DESCRIPTION

The WM9701A is a high-quality stereo audio codec compliant

with the Intel AC鈥?7 Rev 1.03 specification. Forming the

analogue component PC audio solution, it performs full-duplex

18-bit codec functions at 48 ksamples/s and offers excellent

audio quality with high SNR.

In addition, the WM9701A provides a comprehensive analogue

mixer with 4 sets of stereo inputs, plus phone, 2 microphone,

and PC-beep inputs. On-chip reference circuits generate the

necessary bias voltages for the device, and a 5-pin digital bi-

directional serial interface allows transfer of control data and

DAC and ADC words to and from the AC鈥?7 controller.

The WM9701A is particularly suited to low power applications

such as notebook PCs.

FEATURES

鈥?/div>

3.3V or 5V operation

18-bit stereo codec

S/N ratio > 95dB

Multiple stereo input mixer

Mono and stereo volume control

48-pin TQFP package

Power management features

Very low standby power

APPLICATIONS

鈥?/div>

Notebook PC

PC sound cards

Motherboards

BLOCK DIAGRAM

VOL/

MUTE

VOL/

MUTE

危

VOL/

MUTE

(35,36) LINEOUT

危

KEY:

MONO

STEREO

VOL/

MUTE

MUX

VOL/

MUTE

(37) MONOOUT

STEREO

DAC

VOL/

MUTE

VOL/

MUTE

VOL/

MUTE

VOL/

MUTE

VOL/

MUTE

(6) BITCLK

危

WM9701A

(10) SYNC

SERIAL

I/F

(8) SDATAIN

(5) SDATAOUT

(11) RESETB

CD (18,20)

LINEIN (23,24)

VIDEO (16,17)

AUX (14,15)

PHONE (13)

PCBEEP (12)

MIC[1] (21)

MUX

MIC[2] (22)

VOL

RECORD

MUX

AND

MUTE

0dB/

20dB

STEREO

ADC

OSC

(2) XTLIN

(3) XTLOUT

WOLFSON MICROELECTRONICS LTD.

Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK

Tel: +44 (0) 131 667 9386

Fax: +44 (0) 131 667 5176

Email: sales@wolfson.co.uk

http://www.wolfson.co.uk

Production Data

datasheets contain final

specifications current on publication date.

Supply of products conforms to Wolfson

Microelectronics鈥?Terms and Conditions.

餂?/div>

2001 Wolfson Microelectronics Ltd

.

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