High-Performance Audio DAC

A Digital-to-Analog Converter (DAC) converts digital signals into analog signals, reproducing audio more efficiently and with higher fidelity, reducing distortion, and restoring rich, detailed sound.

Nuvoton introduces a high-performance 24-bit audio DAC. The NAU8421 features high integration, high-resolution audio quality, and a compact footprint, enabling clean, low-noise output for demanding audio systems.

The core performance of an audio DAC directly determines sound quality. Key metrics include:

• Signal-to-Noise Ratio (SNR)
• Total Harmonic Distortion + Noise (THD+N)
• Dynamic Range
• Sampling Rate & Bit Depth
• Clock Jitter

NAU8421 Key Features

• 128 dB SNR, THD+N = -99 dB (A-weighted)
• Supports 8 kHz to 192 kHz sampling rates
• 105 dB power supply rejection ratio (PSRR)
• Standalone mode or I²C control mode
• Automatic clock detection and clock termination protection (CTP)
• Built-in Fractional Delay Filter
• QFN20 5×5 mm package
• Operating temperature: -40°C to +85°C

A high-performance audio DAC is designed to reproduce high-quality audio signals, delivering richer details, clearer brightness, and realistic sound — enhancing the listening experience and overall audio system performance.

NAU8421 Applications

• Professional speakers and power amplifiers
• Digital mixing consoles
• Home theater players
• Blu-ray players, SACD/CD players
• Premium automotive audio systems