DESCRIPTION

The WM8778 is a high performance, stereo audio CODEC. It is ideal for surround sound processing applications for home hi-fi, DVD-RW and other audio visual equipment.
The stereo 24-bit multi-bit sigma delta ADC has programmable gain with automatic level control. Digital audio output word lengths from 16-32 bits and sampling rates from 32kHz to 96kHz are supported.

FEATURES

• Audio Performance
− 108dB SNR (‘A’ weighted @ 48kHz) DAC
− 102dB SNR (‘A’ weighted @ 48kHz) ADC
• DAC Sampling Frequency: 32kHz – 192kHz
• ADC Sampling Frequency: 32kHz – 96kHz
• Stereo ADC input analogue gain adjust from +24dB to –21dB in 0.5dB steps
• ADC digital gain from -21.5dB to -103dB in 0.5dB steps
• Programmable Automatic Level Control (ALC) or Limiter on ADC input.
• Stereo DAC with analogue line outputs.
• 3-Wire SPI Compatible or 2-wire Serial Control Interface
• Hardware Control Mode
• Master or Slave Clocking Mode
• Programmable Audio Data Interface Modes
− I2S, Left, Right Justified or DSP
− 16/20/24/32 bit Word Lengths
• Analogue Bypass Path Feature
• 2.7V to 5.5V Analogue, 2.7V to 3.6V Digital supply Operation

APPLICATIONS

• Surround Sound AV Processors and Hi-Fi systems
• DVD-RW