NAU85L40B Overview
The NAU85L40B is a low power, high quality, 4-channel ADC for microphone array application. The NAU85L40B integrates programmable gain preamplifiers for quad differential microphones, significantly reducing external ponent requirements. A fractional FLL is available to accurately generate any audio sample rate using any monly available system clock source from 8KHz through 33MHz.
NAU85L40B Key Features
- 101dB SNR (A-weighted) @ 0dB gain, VDDA=1.8V, Fs = 48 kHz, OSR=128x
- 92dB THD+N @ 0dB gain, 0.8Vrms in, VDDA=1.8V, Fs=48 kHz, OSR=128x
- Integrated programmable gain microphone amplifier
- On-chip FLL
- I2C Serial control interface with read/write
- Supports sample rates from 8 kHz to 96 kHz at 24bit resolution
- Two separate microphone bias supplies for low noise microphone biasing
- Standard audio data bus interfaces: I2S, Left or Right justified, TDM (4 channel), Two’s pliment, MSB first
- 32-bit audio sub frames
- Package: Pb free 28L-QFN