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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-lead TQFP package with 7mm
body size.
WM9707
AC’97 Revision 2.1 Audio CODEC with SPDIF Output
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-lead 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 audio 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
LINEOUT
LNLVLOUT
Σ
MUX
VOL/
MUTE
MONOOUT
STEREO
DAC
SRC
EAPD
3D
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
Σ
Σ
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WM9707
BITCLK
SERIAL
I/F
SYNC
SDATAIN
SDATAOUT
RESETB
SPDIF ENABLE
SPDIF
CD
LINEIN
VIDEO
AUX
PHONE
PCBEEP
MIC1
MUX
MIC2
VOL
RECORD
MUX
AND
MUTE
0dB/
20dB
STEREO
ADC
SRC
MASTER/
SLAVE
SELECT
CID
OSC
XTLIN
XTLOUT
WOLFSON MICROELECTRONICS plc
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Production Data, June 2006, Rev 4.1
Copyright
2006
Wolfson Microelectronics plc