WM9707
AC’97 Revision 2.1 Audio Codec with SPDIF Output
Advanced Information, January 2001, Rev 2.2
DESCRIPTION
WM9707 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, hardware sample rate
conversion, master/slave mode operation and SPDIF
output.
WM9707 is interchangeable with AC’97 codecs from
Wolfson and other suppliers. The WM9707 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
Very low standby power
Variable rate audio (VRA) support
Analogue 3D stereo enhancement
Line level outputs
Supports Rev. 2.1 specified modem sample rates
and filtering
Master/slave ID selection
PC-beep connection when device held reset
SPDIF digital output
BLOCK DIAGRAM
VOL/
MUTE
VOL/
MUTE
KEY:
MONO
STEREO
VOL/
MUTE
VOL/
MUTE
Σ
VOL/
MUTE
VOL/
MUTE
(35,36) LINEOUT
(39,41) LNLVLOUT
Σ
MUX
VOL/
MUTE
(37) MONOOUT
STEREO
DAC
SRC
(47) EAPD
3D
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
(6) BITCLK
Σ
Σ
WM9707
SERIAL
I/F
(10) SYNC
(8) SDATAIN
(5) SDATAOUT
(11) RESETB
(44) SPDIF ENABLE
(48) SPDIF
CD (18,20)
LINEIN (23,24)
VIDEO (16,17)
AUX (14,15)
PHONE (13)
PCBEEP (12)
MIC1 (21)
MUX
MIC2 (22)
VOL
RECORD
MUX
AND
MUTE
0dB/
20dB
STEREO
ADC
SRC
MASTER/
SLAVE
SELECT
(45) CID
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
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
.
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
