• AV receiver on-a-chip with 8 DACs and 2 ADCs
• Integrated S/PDIF/IEC60958/AES3 transceiver
• Analogue Bass Management and stereo mixdown support
• Analogue tone controls for front 3 channels
• Master volume control on each DAC channel with gain range of +20dB to -100dB in 1dB steps
• Audio Performance
• 108dB SNR (’A’ weighted @ 48kHz) DAC
• 102dB SNR (’A’ weighted @ 48kHz) ADC
• 110dB SNR (’A’ weighted) Analogue volume control
• DAC Sampling Frequency: 8KHz - 192kHz
• ADC Sampling Frequency: 8KHz - 192kHz
• 3-Wire SPI or 2-wire MPU Serial Control Interface with read back
• Master or Slave Clocking Mode
• Programmable Format Audio Data Interface Modes
• Four Independent stereo DAC outputs with independent digital volume controls
• Integrated Stereo headphone amplifier with source select
• 5.1 channel analogue input prior to the tone controls, bass management and stereo mix down functions.
• Six stereo input ADC mux with analogue gain adjust from +24dB to -21dB in 0.5dB steps
• 5V Analogue, 2.7V to 3.6V Digital Supply Operation

The WM8777 is a high performance, multi-channel audio codec. The WM8777 is ideal for surround sound processing applications for home hi-fi, automotive and other audio visual equipment. A S/PDIF transceiver with 4-channel input mux is included. Analogue domain bass management processing, and front channel analogue tone control facilities are provided.

A stereo 24-bit multi-bit sigma delta ADC is used with a six stereo channel input selector. Each channel has analogue domain mute and programmable gain control. Sampling rates from 8kHz to 192kHz are supported.

Four stereo 24-bit multi-bit sigma delta DACs are provided, which may be used to support up to 7.1 channel operation. If preferred, 5.1 operation may be chosen, with the spare stereo DAC used to support an Aux remote room. Sampling rates from 8kHz to 192kHz are supported. Each DAC channel has independent digital volume and mute control. A set of input multiplexors allows switching of an external 5.1 analogue input, or bypass channel stereo analogue input into the signal path. The front channel analogue signals may be looped out of the chip prior to each master volume control, and external filtering applied in order to select treble and bass filter characteristics. Adjustment of tone controls is then achieved using on-chip gain adjust amplifiers, addressed via the control interface. Analogue bass management support is provided, plus analogue stereo mixdown options.

The device is controlled via a serial interface giving access to all features including channel selection, volume controls, tone controls, mutes, de-emphasis and power management facilities. The device is available in a 100-pin TQFP package.