WM8731CSEFL

Overview

The WM8731CSEFL is a stereo audio CODEC manufactured by Cirrus Logic, designed for high-fidelity analog-to-digital and digital-to-analog conversion. It features two ADCs and two DACs with a resolution of 24 bits and supports sampling rates up to 96 kHz. The device operates within a power supply voltage range of 1.8 V to 3.6 V. Key performance metrics include a signal-to-noise ratio of 90 dB for the ADC and 100 dB for the DAC. It utilizes serial interfaces compatible with 2-Wire or 3-Wire protocols for control. The component is housed in a 28-pin QFN package and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates dual-channel stereo ADC and DAC for complete audio signal processing
• Supports standard serial digital audio interfaces including I2S and Left-Justified modes
• Includes integrated headphone amplifier output stage
• Features programmable gain stages for microphone and line inputs

Applications

• Multimedia development boards requiring FPGA-based audio integration
• Portable consumer electronics such as MP3 players and mobile devices
• Industrial audio systems requiring robust analog front-end processing

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to limited availability status. Confirm RoHS compliance documentation matches specific revision requirements. Check for assembly site change notices regarding Unisem to ASE transitions. Ensure ordering suffixes align with exact packaging specifications required for surface mount assembly processes.

Selection Notes

Evaluate compatibility with host processor serial interface protocols before implementation. Verify power supply constraints against the 1.8 V to 3.6 V operational range. Consider thermal management requirements given the QFN-28 package footprint. Assess whether the 96 kHz maximum sampling rate meets specific application bandwidth needs compared to higher-performance alternatives.

Part Context

This component belongs to the WM8731 series of stereo CODECs from Cirrus Logic. It serves as a foundational audio interface solution for embedded systems. The part number indicates specific packaging and temperature grade variations within the broader product family. It represents a legacy but widely deployed solution in established hardware designs.

Replacement Considerations

WM8904CGEFL/V is identified as a potential substitute offering ultra-low power characteristics. Verify pinout compatibility and register configuration differences before substitution.