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