WM9701A Datasheet, PDF (1/24 Pages) Wolfson Microelectronics plc – Low Power AC97 Multimedia Audio Codec

WM9701A
Low Power AC’97 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’97 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’97 controller.
The WM9701A is particularly suited to low power applications
such as notebook PCs.
FEATURES
• 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
• Notebook PC
• PC sound cards
• Motherboards
BLOCK DIAGRAM
VOL/
MUTE
VOL/
MUTE
KEY:
MONO
STEREO
Σ
VOL/
MUTE
Σ
MUX
VOL/
MUTE
VOL/
MUTE
STEREO
DAC
(35,36) LINEOUT
(37) MONOOUT
CD (18,20)
LINEIN (23,24)
VIDEO (16,17)
AUX (14,15)
PHONE (13)
PCBEEP (12)
MIC[1] (21)
MIC[2] (22)
MUX
0dB/
20dB
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
VOL/
MUTE
Σ
Σ
WM9701A
RECORD
MUX
AND
MUTE
VOL
STEREO
ADC
SERIAL
I/F
(6) BITCLK
(10) SYNC
(8) SDATAIN
(5) SDATAOUT
(11) RESETB
OSC
(2) XTLIN
(3) XTLOUT
WOLFSON MICROELECTRONICS LTD.
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: [phone]
Fax: [phone]
Email: [e-mail]
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.