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.

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

• 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