WM8941GEFL/RV

Overview

The WM8941GEFL/RV is a mono audio CODEC designed for portable applications such as digital still cameras and camcorders. It integrates a high-quality ADC and DAC with an on-chip speaker driver and video buffer. The device supports audio sample rates from 8 to 48 kHz with 24-bit resolution. Key electrical parameters include a DAC SNR of 98 dB and an ADC SNR of 91 dB. It operates on analogue supplies ranging from 2.5 V to 3.6 V, while digital supplies can operate down to 1.71 V. The component is housed in a 28-lead QFN package measuring 4x4 mm.

Feature Summary

• Integrates a differential or single-ended microphone interface with programmable gain and ALC functionality.
• Includes an on-chip current-mode video buffer with programmable gain and sync-tip clamp for TV connectivity.
• Features advanced digital filtering including four programmable notch filters and a selectable high-pass filter.

Applications

• Digital still cameras
• Camcorders
• General purpose mono audio CODEC with video buffer

Procurement Notes

Verify the specific ordering suffix RV indicates tape and reel packaging when sourcing components. Confirm that the manufacturer has designated this part as End of Life, which may impact long-term availability. Ensure compatibility with existing PCB footprints for the 28-lead QFN package during procurement planning.

Selection Notes

Select this component for designs requiring integrated mono audio processing alongside video signal output. Verify that the system power budget accommodates the specified supply voltage ranges. Ensure the digital interface supports the required 2-wire or 3-wire control modes for register configuration.

Part Context

This component belongs to the WM8941 series produced by Cirrus Logic (formerly Wolfson Microelectronics). It is specifically engineered for portable multimedia devices where board space is limited. The integration of audio and video functions reduces the need for external discrete amplifiers and buffers.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the End of Life status, alternative sourcing should focus on verifying pin-to-pin compatibility with other mono CODECs featuring video buffers if direct replacement is necessary.

FAQ

What is the maximum programmable voltage gain for the integrated video buffer?

The maximum programmable voltage gain for the video buffer is 6 dB with a loaded condition, or up to 12 dB unloaded.

Does the WM8941 support both differential and single-ended microphone inputs?

Yes, the device includes a microphone interface that supports both differential and single-ended configurations with programmable preamp gain.

What is the operating temperature range for this component?

The recommended operating temperature range is from -25 °C to +85 °C.