WM8940KGEFL/RV

Overview

The WM8940KGEFL/RV is a low-power, high-quality mono audio CODEC designed for portable applications such as digital still cameras and camcorders. It integrates support for differential or single-ended microphones and includes drivers for speakers, headphones, and a mono line output. The device utilizes advanced Sigma-Delta converters with digital decimation and interpolation filters to deliver high-quality audio at sample rates from 8 to 48 kHz. Key electrical specifications include a DAC SNR of 98 dB and an ADC SNR of 94 dB. It operates on supply voltages ranging from 2.5 V to 3.6 V, with digital supplies capable of operating down to 1.71 V.

Feature Summary

• Integrates microphone preamplifiers and speaker/headphone drivers to minimize external component requirements.
• Features advanced mixed-signal Automatic Level Control (ALC) with noise gate and PGA gain readback capabilities.
• Includes programmable digital filtering options such as a selectable high-pass filter and four notch filters for noise suppression.
• Supports A-law and μ-law companding within the digital audio interface.

Applications

• Digital still cameras
• Camcorders
• General purpose mono audio systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm package type and moisture sensitivity level. Confirm that the component meets RoHS compliance standards required for the target assembly process. Ensure that the supply chain source provides valid traceability records for this discontinued or legacy part number.

Selection Notes

Select this component when a compact mono audio solution with integrated power amplification is required. Evaluate the system's power budget against the device's capability to operate digital supplies at lower voltages. Consider the available digital filtering features if wind noise reduction or narrowband interference suppression is necessary for the application environment.

Part Context

This component belongs to the Cirrus Logic WM8940 series of mono CODECs. It is housed in a 24-lead QFN package measuring 4x4 mm with a height of 0.9 mm. The device is manufactured using CMOS technology and is designed to offer high functionality within a minimal board area while maintaining high thermal performance.

Replacement Considerations

Consult the manufacturer's datasheet for officially listed similar parts. Potential alternatives may include other mono CODECs with integrated speaker drivers from the same product family, provided they meet the required pinout and electrical specifications.