DESCRIPTIONThe 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