WM8956CGEFL/RV

Overview

The WM8956CGEFL/RV is a low-power, high-quality stereo DAC designed for portable multimedia applications. It integrates stereo Class D speaker drivers capable of delivering 1W per channel into 8Ω loads with a 5V supply, alongside headphone and line outputs. The device features 24-bit sigma-delta DACs with digital interpolation filters and supports flexible input configurations for up to three stereo sources and microphone interfaces. Operating with analogue supplies down to 2.7V and digital supplies down to 1.71V, it includes pop/click suppression, 3D enhancement, and an onboard PLL for clock generation. The component is housed in a 32-lead QFN package (5x5x0.9mm) suitable for hand-held systems.

Feature Summary

• Stereo Class D speaker drivers provide 1W per channel into 8Ω loads at 5V supply.
• DAC SNR of 99dB (A-weighted) and THD of -87dB at 48kHz, 3.3V.
• Integrated microphone interface with programmable gain amplifiers and selectable input boost.
• Flexible digital audio interface supporting I2S, DSP Mode, MSB/LSB justified formats, and A-law/μ-law companding.

Applications

• Portable media players
• Games consoles
• Multimedia phones

Procurement Notes

Verify the ordering suffix RV indicates tape and reel packaging with a reel quantity of 3500 units. Confirm the moisture sensitivity level is MSL3 and peak soldering temperature is 260°C. Ensure the application PCB connects the QFN ground paddle to analogue ground as recommended.

Selection Notes

Select this part when a combined DAC and Class D amplifier solution is required for portable devices. Ensure the design accommodates separate analogue (AVDD), digital core (DCVDD), digital buffer (DBVDD), and speaker (SPKVDD) supplies. Verify that the system clock requirements align with the integrated PLL or direct MCLK input capabilities.

Part Context

This component belongs to the WM8956 series produced by Wolfson Microelectronics plc, now Cirrus Logic Inc. The CGEFL/V variant denotes the lead-free QFN package without reel packaging, while the RV suffix specifies the tape and reel configuration. Both variants share identical electrical characteristics and pinouts.

Replacement Considerations

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

FAQ

What is the maximum output power of the Class D speaker drivers?

The stereo Class D speaker drivers can deliver 1W per channel into 8Ω loads when the speaker supply (SPKVDD) is 5V.

How does the WM8956 handle pop and click noise?

The device includes dedicated pop and click suppression mechanisms to minimize audible transients during power-up and power-down sequences.

Can the WM8956 operate with a single supply voltage?

No, the WM8956 requires separate supply rails: analogue supplies (AVDD) down to 2.7V, digital core supplies (DCVDD) down to 1.71V, and speaker supplies (SPKVDD) up to 5.5V.