The WM8731 is a low power stereo codec with an integrated headphone driver. Stereo line and mono microphone level audio inputs are provided, along with a mute function, programmable line level volume control and a bias voltage output suitable for an electric type microphone. Digital audio input word lengths from 16-32 bits and sampling rates from 8 kHz to 96 kHz are supported. Stereo audio outputs are buffered for driving headphones from a programmable volume control, line level outputs are also provided along with anti-thump mute and power up/down circuitry. The device is controlled via a 2 or 3 wire serial interface. The interface provides access to all features including volume controls, mutes, de-emphasis and extensive power management facilities.
- Stereo audio codec with integrated headphone driver (50mW on 16W at 3.3V)
- Playback mode power consumption
- 8 to 96kHz Sampling frequency
- Master or slave clocking mode
- USB clocking mode can generate all common MP3 sample rates (incl. 441.kHz) directly from USB clock
- Output volume and mute controls
- Microphone input and electret bias with side tone mixer
- Selectable ADC high pass filter
- 2 or three-wire MPU serial control interface
- Programmable audio data interface modes
- 28-Pin SSOP package
- Applications:
- Portable MP3 players and recorders
- CD and Minidisc recorders
- PDAs/smartphones
