DESCRIPTION

The WM8756 is a high performance 6-channel DAC designed for audio applications such as SACD™ players, DVD-V and DVD-A, home audio and theatre systems. The device supports data input word lengths from 16 to 32-bits and sampling rates up to 192kHz. The WM8756 can implement 2 or 6 channels at 192kHz for high-end DVD-Audio, or 6 channels at up to 192kHz for surround applications. Additionally 64x DSD bitstream support is offered on all 6 channels. The WM8756 consists of a serial interface port, digital interpolation filters, multi-bit sigma delta modulators and 6 DACs in a 48-pin TQFP package. The WM8756 also includes a digitally controllable mute and attenuator function on each channel, accessible during PCM operation. An on-chip multiplexer selects between PCM or DSD audio data input pins.

FEATURES

• 6-Channel DAC with PCM or Bitstream (DSD) operation.

• DSD 64x Bitstream Support for Super Audio CD™

• Independent input pins for PCM and DSD data with on-chip multiplexer

• THD –96dB, SNR 106dB (‘A’ weighted @ 48kHz)

• PCM mode Sampling Rate: 8kHz – 192kHz

• Master or slave operation with Normal or Phase modulation method of DSD data transfer

• 3-Wire Serial Control Interface

• Programmable PCM Audio Data Interface Modes

− I2S, Left, Right Justified or DSP

− 16/20/24/32 bit Word Lengths

• Independent Digital Volume Control on Each Channel with 127.5dB Range in 0.5dB Steps (in PCM mode)

• 3.0V – 5.5V Supply (3.3V digital / 5V analogue option)

• 48-pin TQFP Package

APPLICATIONS

• Super Audio CD (SACD™) Players

• Universal and Multi-Format disc players

• Home theatre systems