WM9703
AC’97 Revision 2.1 Audio Codec
Production Data, January 2001, Rev 3.4
DESCRIPTION
WM9703 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 and line-level outputs. In addition, support is
provided for variable sample rates and accommodation is
made for master/slave mode operation.
WM9703 is interchangeable with AC’97 codecs from
Wolfson and other suppliers. The WM9703 is fully
operable on 3.3V or 5V or mixed 3.3/5V supplies, and is
packaged in the industry standard 48-pin TQFP package
with 7mm-body size.
AC’97 FEATURES
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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
Low power implementation
Very low standby power
AC’97 REVISION 2.1 FEATURES
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Variable rate audio (VRA) support
Analogue 3D stereo enhancement
Line level outputs
Supports Revision. 2.1 specified modem sample rates
and filtering
Master/slave ID selection
PC-beep connection when device held reset
BLOCK DIAGRAM
VOL/
MUTE
VOL/
MUTE
Σ
VOL/
MUTE
VOL/
MUTE
(35,36) LINEOUT
(39,41) LNLVLOUT
Σ
KEY:
MONO
STEREO
VOL
STEREO
DAC
MUX
VOL/
MUTE
(37) MONOOUT
SRC
(47) EAPD
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
3D
(6) BITCLK
Σ
Σ
WM9703
SERIAL
I/F
(10) SYNC
(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
SRC
MASTER/
SLAVE
SELECT
(45) CID[0]
(46) CID[1]
(2) XTLIN
(3) XTLOUT
OSC
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176Email: 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’ Terms and Conditions.
2001 Wolfson Microelectronics Ltd
.
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
