DESCRIPTION

The WM8742 is a very high performance stereo DAC designed for audio applications such as professional recording systems, A/V receivers and high specification CD, DVD and home theatre systems. The device supports PCM data input word lengths from 16 to 32-bits and sampling rates up to 192kHz. The WM8742 also supports DSD bit-stream data format, in both direct DSD and PCM-converted DSD modes.

FEATURES

• Advanced Ultra High Performance Multi-bit Sigma-Delta Architecture

    - 126dB SNR (‘A’-weighted mono @ 48kHz)

    - 123dB SNR (‘A’-weighted stereo @ 48kHz)

    - 121dB SNR (non-weighted stereo @ 48kHz)

    - -100dB THD @ 48kHz

    - Differential analogue voltage outputs

    - High tolerance to clock jitter

• PCM Mode

    - Sampling frequency: 32kHz to 192kHz

    - Input data word length support: 16 to 32-bit

    - Supports all standard audio interface formats

    - Selectable advanced digital filter responses

        - Includes linear/minimum phase and range of tailored characteristics

        - Enables low pre-ringing, minimal latency

    - Optional interface to industry standard external filters

    - Digital volume control in 0.125dB steps with soft ramp and soft mute

    - Anti-clipping mode to prevent distortion even with input signals recorded up to 0dB

    - Selectable de-emphasis support

    - Zero Flag output

• DSD Mode

    - DSD bit-stream support for SACD applications

    - Support for normal or phase modulated bit-streams

    - Direct or PCM converted DSD paths (DSD Plus)

    - DSD mute

• Hardware or software control modes:

    - 2 and 3 wire serial control interface support

• Pin compatible with WM8740 and WM8741

• 4.5V to 5.5V analogue, 3.15V to 3.6V digital supply operation

• 28-lead SSOP Package

APPLICATIONS

• Professional audio systems

• CD, DVD, SACD audio

• Home theatre systems

• A/V receivers