WM8974CGEFL/RV

Overview

The WM8974CGEFL/RV is a mono audio CODEC designed for portable applications, featuring integrated ADC and DAC with sample rates from 8 to 48 kHz. It includes an on-chip headphone/speaker driver capable of 40 mW into 16 Ω at 3.3 V or 0.9 W BTL into 8 Ω at 5 V. The device supports differential or single-ended microphone inputs with programmable gain up to +35.25 dB. Digital features include a 5-band EQ, digital limiter, and programmable filters for wind noise reduction. Operating voltages range from 2.5 V to 3.6 V for analog supplies, with digital core operation down to 1.71 V.

Feature Summary

• Integrated mono audio codec with high-quality Sigma-Delta converters and digital decimation/interpolation filters.
• On-chip speaker and headphone drivers supporting cap-less connection without external coupling capacitors.
• Advanced digital signal processing including 5-band equalizer, automatic level control (ALC), and noise gate.
• Flexible microphone interface with programmable preamp gain, pseudo-differential inputs, and electret bias supply.

Applications

• Digital still camera audio codecs
• Wireless VoIP communication handsets and headsets
• Portable audio recorders

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm the specific suffix RV indicates tape and reel packaging with a quantity of 3,500 units. Check for moisture sensitivity level MSL3 requirements regarding storage conditions prior to surface mount assembly.

Selection Notes

Select this component for designs requiring a low-power mono audio solution with integrated output drivers. Ensure the system supports the required 2-wire or 3-wire control interface. Verify that the available power supplies meet the minimum voltage requirements for the digital core and analog sections to maintain specified performance levels.

Part Context

This part belongs to the WM8974 series by Cirrus Logic, originally developed by Wolfson Microelectronics. It serves as a specialized mono variant within the broader audio codec portfolio, targeting cost-sensitive and space-constrained portable devices where stereo capability is unnecessary.

Replacement Considerations

WM8974GEFL/V: Pin-compatible alternative with different packaging configuration.

FAQ

What is the maximum output power of the speaker driver?

The speaker driver can deliver 0.9 W into an 8 Ω load when powered by a 5 V SPKVDD supply in bridge-tied load (BTL) mode.

Does the WM8974 support differential microphone inputs?

Yes, the device supports both differential and single-ended microphone interfaces with programmable gain and common mode rejection capabilities.

How is the control interface configured?

The control interface mode is selected via the MODE pin; a high state selects 3-wire MPU mode, while a low state selects 2-wire MPU mode.