WM8918CGEFL/RV

Overview

The WM8918CGEFL/RV is a high-performance ultra-low power stereo DAC optimized for portable audio applications. It features stereo ground-referenced headphone amplifiers utilizing Wolfson 'Class-W' techniques with a dual-mode charge pump architecture to optimize efficiency. The device supports single-ended or differential analogue inputs and includes a stereo digital microphone interface. Key electrical parameters include a quiescent power consumption of 3.8mW for DAC-to-headphone playback and 2.4mW for analogue bypass playback. Typical performance metrics are a DAC SNR of 96dB and THD of -86dB. It operates from a single 1.8V switched supply, with the digital core functioning at 1.0V.

Feature Summary

• Ground-referenced Class-W headphone and line outputs eliminate AC coupling capacitors.
• Integrated control write sequencer minimizes pops and clicks via SilentSwitch technology.
• ReTune Mobile 5-band parametric equalizer optimizes speaker characteristics.
• Digital Dynamic Range Controller (DRC) provides compression and level control.

Applications

• Wireless headsets
• Portable multimedia players
• Handheld gaming

Procurement Notes

Verify the ordering suffix '/RV' corresponds to the tape and reel packaging configuration as specified in the manufacturer's ordering information. Confirm that the component meets MSL3 moisture sensitivity requirements for storage conditions prior to surface mount assembly. Ensure compatibility with the 32-lead QFN package dimensions during PCB layout planning.

Selection Notes

Select this component for designs requiring ultra-low power consumption in portable audio systems. The integrated Class-W amplifier allows for capacitor-free output stages, reducing external component count. Verify that the system clocking requirements align with the internal FLL capabilities for standard sample rates ranging from 8kHz to 96kHz.

Part Context

This part belongs to the WM8918 series produced by Cirrus Logic (formerly Wolfson Microelectronics). It is specifically designed as an ultra-low power DAC rather than a full codec, lacking integrated ADCs found in other models like the WM8904. The '/RV' suffix indicates the reel packaging variant, distinct from the tray-packaged '/V' version.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.