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