DESCRIPTION
The WM9710 is a high-quality stereo audio codec with an integrated headphone driver.
The device is compliant with the Intel AC’97 Rev 2.2 specification. It performs full-duplex 18-bit codec functions and supports variable sample rates from 8kHz to 48kHz with high signal to noise ratio. Analogue mixers are included to mix external analogue signals into the playback or record path.

FEATURES
• AC’97 rev2.2 compliant, 18-bit stereo codec
• Integrated headphone driver
• Automatic headset detection and switching (for stereo headphones / mono phone headsets)
• Separately mixed mono output for phone TX path (also includes headphone buffer for mono earpiece)
• Multiple channel input mixer
• Mono inputs for phone RX and PCBEEP signals
• On-chip sample rate conversion, supports rates from 8kHz to 48kHz. DAC and ADC rates are fully independent.
• Optional S/PDIF or I2S digital audio output
• 3V to 5V operation
• Each circuit block can be separately powered on or off
• Leadless 7mm × 7mm × 0.9mm QFN or 48-pin TQFP package

APPLICATIONS
• Personal Digital Assistants and ‘Smartphones’
• WinCE systems