WM8742GEDS/RV

Overview

The WM8742GEDS/RV is a stereo digital-to-analogue converter (DAC) from Cirrus Logic, housed in a 28-lead SSOP package. It supports PCM data word lengths from 16 to 32 bits and sampling rates up to 192 kHz, alongside DSD bit-stream formats for SACD applications. The device utilizes an advanced multi-bit sigma-delta architecture with selectable digital filters, including linear/minimum phase responses. Recommended operating conditions specify a digital supply (DVDD) of 3.15 V to 3.6 V and an analogue supply (AVDD) of 4.5 V to 5.5 V. Key performance metrics include a typical SNR of 123 dB at 48 kHz and -100 dB THD.

Feature Summary

• Advanced multi-bit sigma-delta architecture with selectable digital filters (sharp/slow roll-off, minimum phase).
• Supports PCM (16–32 bit, 32–192 kHz) and DSD (Direct and Plus modes) audio input formats.
• High signal-to-noise ratio: 123 dB ('A'-weighted stereo @ 48 kHz) and -100 dB THD.
• Pin-compatible with WM8740 and WM8741; includes fine resolution volume control and soft mute.

Applications

• Professional recording systems
• CD, DVD, and SACD audio players
• Home theatre systems
• A/V receivers

Procurement Notes

Verify the ordering suffix 'RV' indicates tape and reel packaging with a quantity of 2,000 units. Confirm the temperature range is -0°C to +70°C. Check for RoHS compliance status as indicated in manufacturer documentation. Ensure DVDD and AVDD power sequencing aligns with internal POR circuit requirements before MCLK activation.

Selection Notes

Select this component for high-fidelity stereo DAC applications requiring support for both PCM and DSD formats. Ensure the system design accommodates separate analogue (4.5–5.5 V) and digital (3.15–3.6 V) supply rails. Verify that the host controller supports the required 2-wire or 3-wire serial control interface or hardware control mode. Consider thermal resistance values if operating near maximum ambient temperatures.

Part Context

The WM8742GEDS/RV belongs to the WM8742 series, which is pin-compatible with the WM8740 and WM8741 models. The 'GEDS' designation refers to the 28-lead SSOP Pb-free package, while '/RV' specifies the tape and reel packaging format. This part is designed for professional and high-end consumer audio equipment requiring low jitter tolerance and advanced digital filtering capabilities.

Replacement Considerations

The WM8740 and WM8741 are confirmed pin-compatible substitutes within the same family. Verify specific feature differences such as filter options or control interfaces when substituting. No other cross-model replacements are documented in the provided source material.