Nuvoton Introduces High-Quality 24-bit Stereo DAC Solution NAU8421YG 

The New High-Quality Audio Solution Ideal for ultimate quality of Audio Playback Enhancement Applications

Hsinchu, Taiwan – November 19, 2025 – Nuvoton is pleased to announce NAU8421YG, a new high quality DAC audio solution. The NAU8421YG is a 24-bit stereo DAC with 8Vpp differential analog output capability, 128dB SNR and -99dB THD+N. This device includes an I²C control interface with additional pin selectable features and standalone operation. The NAU8421YG operates from a 3.3V digital I/O supply voltage and an analog 5V supply voltage. Additionally, the NAU8421YG includes automatic clock detection sequences for smooth power up & power down control. This enables fast and efficient system integration.

The NAU8421YG’s preliminary function is to provide a high-quality and efficiency differential line level output (Line-Out), converting digital audio sources (such as computer, instrument, mixer, effect or streamers) into an analog signal, which is then sent to equipment that requires external or built-in amplification circuitry.

NAU8421YG Key Features

● 128dB SNR A-weighted performance
● -99dB THD+N
● 105dB PSRR at 1kHz
● 140dB channel separation at 1kHz
● Auto clock detection
● Standalone (hardware control) mode
● Low power consumption
● Package: QFN-32 (5 x 5 mm)
● Operating Temperature Range: -40℃ ~ +85℃

Leap forward in Efficiency, Power and auto clock detection sequences

The NAU8421YG operates from a 3.3V digital I/O supply voltage and an analog 5V supply voltage which can achieve 40-50mW low power consumption. Additionally, the NAU8421YG includes automatic clock detection sequences for smooth power up & power down control. This enables fast and efficient system integration. It can serve as the core decoder, replacing the DAC built into a playback system or streamer to improve the quality, outputting to an integrated or pre-amplifier. Pairs with a pre-amplifier provide the purest analog source signal, achieving source separation for critical listening. Act as part of an audio interface to provide accurate, low distortion analog output to studio monitor controllers or mixing consoles.

Superior Isolation and dynamic range for multi-channel system

The 140dB channel signal separation at 1kHz represents the leakage (cross talk) between channels, which secures the over system’s dynamic range and ensures the maximum limit offered by 24-bit resolution without crosstalk issue. It allows users to accurately measure both extremely loud (high amplitude) and extremely low (low amplitude) signals simultaneously with the highest accuracy. This is crucial for multi-track recording in studios or for multi-sensor data acquisition in industrial measurements, ensuring the independence and integrity of each channel’s signal.

NAU8421YG Target Applications and Markets:

• High-quality audio enhancement – Traditional Hi-Fi Stereo Audio playback systems, Analog Input to High End Pre-Amplifiers, Active (Powered) Speakers
• Audio/Video professional sound cards, mixers, effects, e-pianos, and instruments

For more information about NAU8421YG, please visit https://www.nuvoton.com/products/smart-home-audio/audio-converters/audio-dac-series/nau8421yg/

About Nuvoton Technology

Nuvoton Technology Corporation (Nuvoton) was founded to bring innovative semiconductor solutions to the market. Nuvoton was spun-off as a Winbond Electronics affiliate in July 2008 and went public in September 2010 on the Taiwan Stock Exchange (TWSE). Nuvoton focuses on the developments of microcontroller/audio, cloud security, battery monitoring, component, visual sensing and IoT with security ICs and has strong market share in Industrial, Automotive, Communication, Consumer and Computer markets. Nuvoton owns 6-inch wafer fabs equipped with diversified processing technologies to provide professional wafer foundry services. Nuvoton provides products with a high performance/cost ratio for its customers by leveraging flexible technology, advanced design capability, and integration of digital and analog technologies. Nuvoton values long term relationships with its partners and customers and is dedicated to continuous innovation of its products, processes, and services. Nuvoton has established subsidiaries in the USA, China, Israel, India, Singapore, Korea, Japan and Germany to strengthen regional customer support and global management. For more information, please visit https://www.nuvoton.com 

*Note: Nuvoton and NuMicro are registered trademarks of Nuvoton Technology Corporation. All other trademarks and copyrights mentioned herein are the property of their respective owners.

Nuvoton Media Contact
Carol Chang
Microcontroller Digital Marketing Director
+886-3-5770066 ext. 23123
YHChang8@nuvoton.com