Description

Multimodal Sensor Front End Features: Multimodal analog front end 8 input channels with multiple operation modes for various sensor measurements Dual-channel processing with simultaneous sampling 12 programmable time slots for synchronized sensor measurements Flexible input multiplexing to support differential and single-ended sensor measurements 8 LED drivers, 4 of which can be driven simultaneously Flexible sampling rate from 0.004 Hz to 9 kHz using internal oscillators On-chip digital filtering SNR of transmit and receive signal chain: 100 dB AC ambient light rejection: 60 dB up to 1 kHz 400 mA total LED peak drive current Total system power dissipation: 30 µW (combined LED and AFE power), continuous PPG measurement at 75 dB SNR, 25 Hz ODR, 100 nA/mA CTR SPI communications supported 512-byte FIFO size