The WM8776 is a stereo audio codec with six-channel input selector and a multi-bit Delta Sigma A/D converter that is used with a five-stereo channel input mixer. Each ADC channel has programmable gain control with automatic level control. Digital audio output word lengths from 16-32 bits and sampling rates from 32 kHz to 96 kHz are supported. A multi-bit Delta Sigma D/A converter is used with digital audio input word lengths from 16-32 bits and sampling rates from 32 kHz to 192 kHz. The DAC has an input mixer allowing an external analog signal to be mixed with the DAC signal. There are also headphone and line outputs, with volume controls for the headphones. The WM8776 supports fully independent sample rates for the ADC and DAC. The audio data interface supports I²S, left justified, right justified and DSP formats. The device is controlled in software via a 2 or 3 wire serial interface, selected by the MODE pin, which provides access to all features including channel selection, volume controls, mutes, and de-emphasis facilities.
- 32 to 192kHz DAC sampling frequency
- 32 to 96kHz ADC sampling frequency
- Five stereo ADC inputs with analog gain adjust from +24 to -21dB in 0.5dB steps
- Programmable limiter or automatic level control (ALC)
- Stereo DAC with independent analog and digital volume controls
- Stereo headphone and line output
- Three-wire SPI compatible or two-wire software serial control interface
- Master or slave clocking mode
- Programmable audio data interface modes
- Analog bypass path feature
- Selectable AUX input to the volume controls
- 2.7V to 5.5V analog, 2.7V to 3.6V digital supply operation
