WM9708 Datasheet, PDF (1/28 Pages) Wolfson Microelectronics plc – AC97 Revision 2.1 Audio Codec

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.
WM9708
AC’97 Revision 2.1 Audio Codec
Advanced Information, April 2001, Rev 2.0
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
KEY:
MONO
STEREO
Σ
VOL/
MUTE
VOL/
MUTE
Σ
MUX
VOL/
MUTE
VOL/
MUTE
STEREO
DAC
SRC
(25,56) LINEOUT
(26) MONOOUT
VOL/
MUTE
VOL/
MUTE
CD (13,15)
LINEIN (17,18)
PCBEEP (12)
MIC1 (16)
MUX
0dB/
20dB
VOL/
MUTE
Σ
Σ
WM9708
SERIAL
I/F
(7) BITCLK
(10) SYNC
(9) SDATAIN
(6) SDATAOUT
(11) RESETB
RECORD
MUX
AND
MUTE
VOL
STEREO
ADC
SRC
OSC
(4) XTLIN
(5) XTLOUT
WOLFSON MICROELECTRONICS LTD
Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: [phone]
Fax: [phone]
Email: [e-mail]
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.