WM8521CH9GED/R

Overview

The WM8521CH9GED/R is a stereo digital-to-analog converter (DAC) from Cirrus Logic, designed for consumer digital audio applications requiring a 2.0Vrms line output. It integrates an output op-amp stage to reduce external component requirements. The device utilizes a 24-bit multi-bit sigma-delta architecture with oversampling digital interpolation filters. It supports digital audio input word lengths from 16 to 32 bits and sampling rates from 8kHz to 96kHz. The DAC features a signal-to-noise ratio of 98dB ('A' weighted at 48kHz) and total harmonic distortion of -81dB ('A' weighted at 48kHz). Power supplies range from 8.2V to 13.2V for analog and 2.7V to 3.6V for digital sections.

Feature Summary

• Integrated output op-amp stage generating 2.0Vrms directly at 9V supply
• 24-bit multi-bit sigma-delta DAC with 98dB SNR and -81dB THD
• Pin-selectable audio interfaces: I2S, Right Justified, or DSP formats
• Supports 16-32 bit word lengths and 8kHz-96kHz sampling rates

Applications

• DVD Players
• Digital TV
• Digital Set Top Boxes
• A/V Receivers

Procurement Notes

Verify the specific suffix 'H9' confirms the 9V supply variant capability for 2.0Vrms output, distinct from the HC variant which requires 12V. Confirm package type is SOIC-14. Check current lifecycle status as some sources indicate this series may be discontinued or restricted in certain regions. Ensure RoHS compliance documentation is available for the specific reel.

Selection Notes

Select the WM8521CH9GED/R when a 2.0Vrms line output is required with a lower analog supply voltage (9V) compared to the HC variant. This part is suitable for cost-sensitive consumer audio designs needing integrated drive capabilities. Verify that the system power budget accommodates the 8.2V-13.2V analog supply range. Consider the 14-pin SOIC package constraints for PCB layout.

Part Context

The WM8521 belongs to the Wolfson Microelectronics (now Cirrus Logic) stereo DAC family. It is pin-equivalent to the WM8521HC, differing primarily in the maximum output swing achievable at different supply voltages. The H9 variant is optimized for 9V operation, while the HC variant targets 12V operation. Both share the same core DAC architecture and interface options.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should verify compatibility with alternative stereo DACs offering similar 24-bit resolution and integrated output stages if this part is unavailable.