WM9710

WM9710 AC’97 Audio CODEC and Mixer with Integrated Headphone Driver 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. The WM9710 allows designers to easily integrate phone functions with other audio functions such as MP3 playback and voice recording. Mono inputs and outputs are provided to connect to an external voice codec. The on-chip headphone driver can distinguish between a stereo headphone and mono headset, and route the signals accordingly. Optional AC’97 features include 3D sound enhancement, 2 primary/secondary mode operation and S/PDIF or I S output. The 5-pin bi-directional AC-Link interface transfers control data, DAC and ADC words to and from the AC’97 controller. The WM9710 is fully operable on 3V or 5V or mixed 3/5V supplies, and is packaged in a leadless, chip scale QFN package with 7mm body size or 48-pin TQFP package. 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 ...