WAU8822YG

Overview

The WAU8822YG is a stereo audio codec featuring 24-bit delta-sigma ADCs and DACs. It integrates a BTL speaker driver capable of delivering 1W into an 8Ω load and a headphone driver providing 40mW into 16Ω. The device includes programmable microphone amplifiers, line inputs/outputs, and an internal fractional PLL for clock generation. Digital signal processing functions include a 5-band equalizer, 3-D audio enhancement, automatic level control, and a digital limiter. It operates with analog supplies from 2.5V to 3.6V and a digital core at 1.65V, supporting sample rates from 8kHz to 48kHz.

Feature Summary

• Integrates high-performance 24-bit stereo converters with advanced on-chip DSP including equalization and noise reduction filters.
• Features integrated power drivers for both bridge-tied load speakers and stereo headphones, reducing external component requirements.
• Includes a built-in fractional PLL to generate accurate audio sample clocks from various system frequencies without external components.
• Supports flexible serial control interfaces and standard digital audio protocols like I2S and PCM.

Applications

• Personal media players
• Smartphones
• Portable navigation devices
• Digital still cameras
• Stereo Bluetooth headsets

Procurement Notes

Verify the specific suffix YG against the manufacturer's current datasheet revision to confirm package type and material specifications. Confirm that the intended application environment falls within the specified industrial temperature range of -40°C to +85°C. Ensure supply voltage constraints for VDDA, VDDB, and VDDSPK are strictly adhered to during design validation.

Selection Notes

Select this component when a complete audio solution requiring integrated speaker and headphone driving capabilities is needed. It is suitable for portable applications where low power consumption and minimal external passive components are critical. Consider the available DSP features if specific audio enhancements like wind noise reduction or dynamic range compression are required in the design.

Part Context

The WAU8822YG belongs to Nuvoton Technology Corporation's emPowerAudio series of audio codecs. This family focuses on integrating complex audio processing functions into single chips to simplify system design for portable electronics. The device utilizes a 32-lead QFN package to provide a compact footprint suitable for space-constrained mobile devices.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's official obsolescence notices or cross-reference lists for potential alternatives if discontinuation occurs.

FAQ

What is the maximum output power of the integrated speaker driver?

The WAU8822YG can drive 1 Watt into an 8Ω load using its bridge-tied load (BTL) speaker outputs.

Does the device support digital audio interface master mode?

Yes, the digital audio interface supports operation as either a master or a slave, compatible with I2S and PCM protocols.

How is the microphone bias voltage generated?

The device includes a built-in high-stability voltage reference that generates a programmable microphone bias supply voltage, suitable for both ECM and MEMS microphones.