WAU8814YG

Overview

The NAU8814YG is a low-power, wideband single-channel audio codec designed for voice telephone applications. It integrates a differential microphone input and a single-ended auxiliary input with a programmable gain amplifier (PGA). The device features a five-band graphic equalizer, automatic level control with noise cancellation, and an integrated BTL speaker driver alongside a single-channel line output. Digital interfaces include I²S, PCM with time-slot assignment, and a two-wire or SPI interface. The analog front-end optimizes dynamic range, while the ADC includes a digital high-pass filter and voice band filtering. The DAC path incorporates filtering, mixing, PGA, and soft mute functions.

Feature Summary

• Integrates a five-band graphic equalizer and automatic level control with noise cancellation for enhanced voice quality.
• Features a programmable gain amplifier on the microphone input to handle diverse audio sources and optimize dynamic range.
• Includes an integrated bridge-tied load (BTL) speaker driver and single-channel line output for direct audio driving.
• Supports flexible digital connectivity via I²S, PCM with time-slot assignment, and independent voltage supply for digital interfaces.

Applications

• Voice telephone systems
• Hands-free communication devices
• VoIP endpoints

Procurement Notes

Verify the specific suffix YG against official Nuvoton documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with system power rails, as the analog section requires 2.5V to 3.6V while the digital core operates at 1.71V. Confirm that the selected variant meets all required environmental and reliability standards for the intended deployment.

Selection Notes

Select this component when a cost-effective, low-power solution for single-channel voice processing is required. The integrated BTL driver eliminates the need for external power amplifiers in speaker-driven designs. Consider the available PGA settings and digital filter options if precise acoustic tuning or noise reduction is critical for the target application environment.

Part Context

The NAU8814 belongs to Nuvoton's portfolio of audio codecs optimized for voice-centric applications. It complements the company's broader microcontroller and connectivity offerings by providing dedicated signal processing capabilities for telephony and communication devices. This series focuses on integrating essential audio functions into a compact form factor to reduce bill-of-materials complexity.

Replacement Considerations

Consult official Nuvoton documentation for verified pin-compatible or functionally equivalent alternatives within the NAU88xx family. Cross-reference specifications such as supply voltage ranges, interface protocols, and package dimensions before substituting any other manufacturer's components to ensure system integrity.