WM8776 Datasheet | Wolfson Microelectronics plc

DESCRIPTION The WM8776 is a high performance, stereo audio CODEC with five channel input selector. The WM8776 is ideal for surround sound processing applications for home hi-fi, DVD-RW and other audio visual equipment. A stereo 24-bit multi-bit sigma delta ADC is used with a five stereo channel input mixer. Each ADC channel has programmable gain control with automatic level control. Digital audio output word lengths from 16-32 bits and sampling rates from 32k Hz to 96k Hz are supported. A stereo 24-bit multi-bit sigma delta DAC is used with digital audio input word lengths from 16-32 bits and sampling rates from 32k Hz to 192k Hz. The DAC has an input mixer allowing an external analogue signal to be mixed with the DAC signal. There are also Headphone and line outputs, with volume controls for the headphones. The WM8776 supports fully independent sample rates for the ADC and DAC. The audio data interface supports I2S, left justified, right justified and DSP formats. The device is controlled in software via a 2 or 3 wire serial interface, selected by the MODE pin, which provides access to all features including channel selection, volume controls, mutes, and de-emphasis facilities. The device is available in a 48-pin TQFP package. BLOCK DIAGRAM FEATURES - Audio Performance - 108d B SNR (‘A’ weighted @ 48k Hz) DAC - 102d B SNR (‘A’ weighted @ 48k Hz) ADC - DAC Sampling Frequency: 32k Hz - 192k Hz - ADC Sampling Frequency: 32k Hz - 96k Hz - Five stereo ADC inputs with analogue gain adjust from +24d B to - 21d B in 0.5d B steps - Programmable Limiter or Automatic Level Control (ALC) - Stereo DAC with independent analogue and digital volume controls - Stereo Headphone and Line Output - 3-Wire SPI patible or 2-Wire Software 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 - Analogue Bypass Path Feature - Selectable AUX input to the volume controls - 2.7V to 5.5V Analogue,...