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.

AC’97 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

• Low power implementation

• Very low standby power

AC’97 REVISION 2.1 FEATURES

• 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