Nuvoton Technology Corporation has introduced the NAU85L42YG, a high-performance quad-channel audio ADC designed to accelerate the development of wireless streaming and real-time voice-capture products. The device features Nuvoton’s on-chip silicon signal-processing technology, including low-latency decimator (DECM) digital linear and non-linear filters. These low-pass filters are designed to support wireless real-time streaming applications. The NAU85L42YG also supports a wide supply-voltage range and incorporates robust system protection features.
The NAU85L42YG is a high-performance quad-channel audio ADC designed for audio systems that use both analogue and digital microphone inputs, helping simplify system integration and reduce the need for separate circuitry. The device integrates four ADC channels and supports I²S, PCM and TDM digital audio output interfaces. It also features an advanced on-chip signal-processing engine with a fractional FLL that supports various input clocks and automatic clock detection for BCLK and MCLK. In addition, the NAU85L42YG offers a wide supply-voltage range and robust system protection features.
Addressing Industry Pain Points in Multi-Mic Design
We are pleased to announce significant advancements in the NAU85L42YG, setting a new benchmark for reliable voice capture in 4-array microphone algorithm applications. Designed with precision and adaptability, the NAU85L42YG ensures robust performance by allowing the host SoC to seamlessly detect any microphone malfunction through Mic Diagnostic monitoring. This proactive detection, combined with customer adaptive algorithms, delivers real-time, dependable signal quality. As a result, the NAU85L42YG empowers host-side algorithms to perform at their best, providing exceptional accuracy and reliability in voice capture. These features underscore the NAU85L42YG’s market advantage and reinforce our commitment to innovation and excellence in audio technology.
Conventional quad ADCs without low pass filters will cause delay / high latency during audio data transmission on critical events, especially in real-time stream processing applications. It will cause a mismatch between audio and video streaming, bringing a worse user experience. Nuvoton’s new quad ADC design significantly addresses this challenge by reducing latency time to just one-sixth of what conventional quad ADCs offer. This improvement makes the NAU85L42YG an ideal solution for WiFi or Bluetooth wireless devices that demand low group latency to deliver an outstanding audio user experience.
Key Technical Highlights & Feature Summary YG
- 106 dB SNR / DR @ 1 Vrms& 2 Vrms
- Support up to 192 kHz at 24-bit high resolution
- Develop low latency decimator digital linear and non-linear filters for low latency real time processing
- Built-in intelligence of microphone diagnostic & auto clock detection for algorithm quality assurance
- Flexible output interface supporting PCM / I 2 S / TDM formats for seamless connection and easy integration with audio processors
- Two separate low-noise microphone bias suppliers
- Wide temperature range: -40°C ~ +105°C (Industrial grade)
- Compact package of QFN-32 (4 X 4 mm) with low power <12.4 mW/Channel
