1 Features

Supports signal acquisition of up to 16 phase sets
Supports up to 32 LEDs, 4 PDs
Flexible allocation of LEDs, PDs in each phase
Simultaneous signal acquisition from different sensors at different data rates
Accurate, continuous PPG monitoring:
- Low current for continuous heart-rate monitoring on a wearable device with a typical value: 15 μA for an LED, 15 μA for the receiver
- Peak system SNR of 115 dB
Transmitter:
- 8-Bit Programmable LED current with range adjustable from 25 mA to 250 mA
- Mode to fire two LEDs in parallel with independent per-phase current control
- Programmable LED on-time per-phase
- Simultaneous support of 32 LEDs for SpO2, Multi-Wavelength HRM, and Spectroscopy
Receiver:
- Supports 4 Time-Multiplexed PD Inputs
- 4 parallel receivers (4 sets of TIA/filter)
- Individual ambient offset subtraction DAC at each TIA Input with 8-bit per-phase control and range adjustable up to 255-µA
- Individual LED offset subtraction DAC at each TIA input with 9-bit per-phase control and 64-µA range
- Digital ambient subtraction at ADC output
- Noise filtering with programmable bandwidth
- Transimpedance gain: 3.7 kΩ to 1 MΩ
Supports external clock or internal oscillator
Option to acquire data synchronized with a system clock
Automatic cancellation of DC from Ambient, LED
FIFO with 256-sample depth
SPI™ interface/ I2C interface
2.6-mm × 2.6-mm DSBGA, 0.4-mm Pitch
Supplies: Rx:1.7 - 1.9 V (LDO Bypass); 1.9 - 3.6 V (LDO Enabled), Tx: 3-5.5 V, IO: 1.7-RX_SUP