WM8850GEFL/RV

Overview

The WM8850GEFL/RV is a multi-channel High Definition Audio CODEC designed for high-performance PC audio systems. It features full compatibility with the Intel HDA specification revision 1.0 and includes three stereo DACs for six-channel output, supporting sampling frequencies from 8kHz to 192kHz. The device incorporates two stereo ADCs for four-channel input, operating at sampling rates up to 96kHz. Key performance metrics include a DAC SNR of 108 dB ('A' weighted) and an ADC SNR of 105 dB ('A' weighted). Power supplies are separated into digital core (1.62V–1.98V), digital buffer (2.97V–3.63V), and analogue/charge pump sections (4.5V–5.25V). The component is housed in a 48-pin 7mm x 7mm QFN package.

Feature Summary

• Supports six-channel audio playback via three stereo DACs and four-channel recording via two stereo ADCs.
• Integrates S/PDIF transceiver and transmitter paths with sample rate converters for asynchronous clock domain conversion.
• Includes a ground-referenced stereo headphone amplifier utilizing charge pump and DC servo technology.
• Features a digital microphone interface capable of supporting up to four independent digital microphones.

Applications

• High performance PC audio systems
• All-in-one desktop PCs
• Notebook PCs

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and lead-free status. Confirm that the component meets current environmental compliance standards required for your manufacturing process. Ensure that the supply voltage requirements align with your system design before procurement.

Selection Notes

Select this component for applications requiring strict adherence to the Intel HDA specification revision 1.0. Consider the separate power supply domains when designing the PCB layout to minimize noise coupling between digital and analogue sections. Verify that the 48-pin QFN package dimensions fit within the available board space constraints.

Part Context

The WM8850 belongs to Cirrus Logic's family of multi-channel audio CODECs tailored for PC platforms. It provides a comprehensive solution for high-definition audio by integrating multiple DACs, ADCs, and digital interfaces into a single compact package. This integration reduces the overall bill of materials and simplifies the design process for OEMs developing advanced audio subsystems.

Replacement Considerations

The WM8850GEFL/V is a verified substitute part number. Verify pinout and electrical specifications before implementation.

FAQ

What is the maximum sampling frequency supported by the DACs?

The DACs support sampling frequencies ranging from 8kHz to 192kHz.

Does the WM8850 support digital microphone inputs?

Yes, it contains a digital microphone interface capable of supporting up to four independent digital microphones.

How does the device handle asynchronous sample rates between S/PDIF and HDA interfaces?

Both the S/PDIF receive and transmit paths contain sample rate converters (SRC) to enable asynchronous sample rate conversion between the respective clock domains.