DESCRIPTION

The WM8706 is a high performance stereo DAC designed for audio applications such as DVD, home theatre systems, and digital TV. The WM8706 supports data input word lengths from 16 to 32-bits and sampling rates up to 192kHz. The WM8706 can implement 2 channels at 192kHz for high-end DVD-Audio. The WM8706 consists of a serial interface port, digital interpolation filters, multi-bit sigma delta modulators and stereo DAC in a small 28-pin SSOP package. The WM8706 also includes a digitally controllable mute and attenuate function on each channel.

The WM8706 supports a variety of connection schemes for audio DAC control. The MPU serial port provides access to a wide range of features including on-chip mute, attenuation and phase reversal. A hardware controllable interface is also available. It is pin-compatible with the WM8716 provided the oscillator circuit on WM8716 is not required in the application.

The WM8706 is an ideal device to interface to AC-3, DTS, and MPEG audio decoders for surround sound applications, or for use in DVD players supporting DVD-A.

FEATURES

• Stereo DAC

• Audio Performance

- 106dB SNR (‘A’ weighted @ 48kHz) DAC

- -97dB THD

• DAC Sampling Frequency: 8kHz – 192kHz

• 3-Wire Serial Control Interface or Hardware Control

• Programmable Audio Data Interface Modes

- I2S, Left, Right Justified, DSP

- 16/20/24/32 bit Word Lengths

• Independent Digital Volume Control on Each Channel with

127.5dB Range in 0.5dB Steps

• 3.0V – 5.5V Supply Operation

• 28-Pin SSOP Package

• Exceeds Dolby Class A Performance Requirements

APPLICATIONS

• DVD-Audio and DVD ‘Universal’ Players

• Home theatre systems

• Digital TV

• Digital broadcast receivers