DESCRIPTION

The WM8740 is a very high performance stereo DAC designed for audio applications such as CD, DVD, home theatre systems, set top boxes and digital TV. The WM8740 supports data input word lengths from 16 to 24-bits and sampling rates up to 192kHz. The WM8740 consists of a serial interface port, digital interpolation filter, multi-bit sigma delta modulator and stereo DAC in a small 28-pin SSOP package. The WM8740 also includes a digitally controllable mute and attenuator function on each channel.

FEATURES

• 120dB SNR (‘A’ weighted mono @48kHz), THD+N: -104dB @ FS

• 117dB SNR (‘A’ weighted stereo @48kHz), THD+N: -104dB @ FS

• Sampling frequency: 8kHz to 192kHz

• Selectable digital filter roll-off

• Optional interface to industry standard external filters

• Differential mono mode needing no glue logic

• Input data word: 16 to 24-bit

• Hardware or SPI compatible serial port control modes:

• Hardware mode: mute, de-emphasis, audio format control

• Serial mode: mute, de-emphasis, attenuation (256 steps), phase reversal

• Fully differential voltage outputs

APPLICATIONS

• CD, DVD audio

• Home theatre systems

• Professional audio systems