DESCRIPTION
The WM8770 is a high performance, multi-channel audio codec. The WM8770 is ideal for 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 with an eight stereo channel input selector. Each channel has analogue domain mute and programmable gain control. Digital audio output word lengths from 16-32 bits and sampling rates from 8kHz to 96kHz are supported.

FEATURES
• Audio Performance
− 106dB SNR (‘A’ weighted @ 48kHz) DAC
− 102dB SNR (‘A’ weighted @ 48kHz) ADC
• DAC Sampling Frequency: 8KHz – 192kHz
• ADC Sampling Frequency: 8KHz – 96kHz
• 3-Wire SPI or CCB MPU Serial Control Interface
• Master or Slave Clocking Mode
• Programmable Audio Data Interface Modes
− I2S, Left, Right Justified or DSP
− 16/20/24/32 bit Word Lengths
• Four Independent stereo DAC outputs with independent
analogue and digital volume controls
• Analogue Bypass Path Feature
• Six channel selectable AUX input to the volume controls
• Eight stereo ADC inputs with analogue gain adjust from
+19dB to –12dB in 1dB steps
• 2.7V to 5.5V Analogue, 2.7V to 3.6V Digital supply Operation
• 5V tolerant digital inputs

APPLICATIONS
• Surround Sound AV Processors and Hi-Fi systems
• Automotive Audio