Описание
The WM8772 is a multi-channel audio codec ideal for DVD and surround sound processing applications for home hi-fi, automotive and other audio visual equipment. A stereo 24-bit multi-bit sigma delta ADC is used. Digital audio output word lengths from 16-32 bits and sampling rates from 32kHz to 96kHz are supported. The 32-lead version allows separate ADC and DAC samples rates.Three stereo 24-bit multi-bit sigma delta DACs are used with oversampling digital interpolation filters. Digital audioinput word lengths from 16-32 bits and sampling rates from 8kHz to 192kHz are supported. Each DAC channel has independent digital volume and mute control.The audio data interface supports I2S, left justified, right justified and DSP digital audio formats.The device is controlled via a 3 wire serial interface. The interface provides access to all features including channel selection, volume controls, mutes, de-emphasis and power management facilities. The device is available in a 28-pin SSOP or 32 pin TQFP.
- Audio Performance
- 103dB SNR (‘A’ weighted @ 48kHz) DAC
- 100dB SNR (‘A’ weighted @ 48kHz) ADC (TQFP)
- DAC Sampling Frequency: 8kHz – 192kHz
- ADC Sampling Frequency: 32kHz – 96kHz
- ADC and DAC can run at different sample rates (32 pin TQFP version only)
- 3-Wire SPI Serial or Hardware Control Interface
- Programmable Audio Data Interface Modes
- I2S, Left, Right Justified or DSP
- 16/20/24/32 bit Word Lengths
- Three Independent stereo DAC outputs with independent digital volume controls
- Master or Slave Audio Data Interface
- 2.7V to 5.5V Analogue, 2.7V to 3.6V Digital supply Operation
- 28 pin SSOP or 32 pin TQFP Package
