WM8912CGEFL/RV

Overview

The WM8912CGEFL/RV is a stereo digital-to-analog converter (DAC) with integrated headphone drivers, manufactured by Cirrus Logic. It utilizes Class-W ground-referenced amplifier technology to eliminate coupling capacitors and reduce power consumption. The device features a dynamic range controller, a 5-band parametric equalizer, and an integrated control write sequencer for pop-free startup. It supports sample rates from 8kHz to 96kHz via an internal Frequency Locked Loop (FLL). Electrical specifications include a typical DAC SNR of 96dB and THD of -86dB. Power supplies include DCVDD (0.95V–1.98V), DBVDD (1.42V–3.6V), and AVDD/CPVDD (1.71V–2.0V).

Feature Summary

• Class-W ground-referenced headphone driver delivering 28mW into 30Ω and 32mW into 15Ω at <1% THD.
• Integrated ReTune Mobile 5-band parametric equalizer with programmable coefficients.
• Dynamic range controller with anti-clip and quick release features for impulsive noise handling.
• Control write sequencer minimizes software development and reduces pops/clicks during startup.

Applications

• Portable multimedia players
• Multimedia handsets
• Handheld gaming devices

Procurement Notes

Verify the ordering suffix 'RV' indicates tape and reel packaging with a standard quantity of 3,500 units per reel. Confirm the package type is 32-lead QFN (4x4mm, 0.4mm pitch) and the temperature range is -40°C to +85°C. Ensure compatibility with MSL3 moisture sensitivity levels requiring appropriate storage conditions.

Selection Notes

Select this component when ultra-low power consumption is critical for portable audio applications. The integrated Class-W amplifiers remove the need for external headphone amplifiers or coupling capacitors. Verify that the system requires a single 1.8V switched supply capability and benefits from the on-chip FLL for clock generation from common reference frequencies.

Part Context

The WM8912 is part of the Wolfson Microelectronics portfolio, now Cirrus Logic. It is specifically optimized for portable audio where space and power efficiency are paramount. The device integrates signal processing features like DRC and EQ directly onto the silicon, reducing the bill of materials compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Evaluate other Cirrus Logic codecs such as the WM8904 or WM8978 based on specific interface requirements and power constraints, noting differences in ADC presence and output drive capabilities.

FAQ

What is the quiescent power consumption for DAC to headphone playback?

The quiescent power consumption is 3.8mW for DAC to headphone playback under standard test conditions.

How does the device handle ground noise rejection?

The outputs include common mode feedback paths to reject ground noise, utilizing Wolfson’s Class-W amplifier techniques.

What is the maximum operating voltage for the digital buffer supply (DBVDD)?

The maximum recommended operating voltage for the digital buffer supply (DBVDD) is 3.6V.