1 Features

Fully-Integrated AFE for Pulse Oximeter and Heart Rate Monitoring Applications:
Transmit:
- Integrated Dual LED Driver
  (H-Bridge or Common Anode)
- Option for a Third LED Support for Optimized SPO2, HRM, or Multi-Wavelength HRM
- Up to 110-dB Dynamic Range
- LED Current:
  - Programmable to 100 mA with 8-Bit Current Resolution
- 30 µA + Average LED Current
- Programmable LED On-Time
- Independent LED2 and LED1 Current Reference
Receive Channel with High Dynamic Range:
- 22-Bit Output in Twos Complement Format
- Up to 105-dB Dynamic Range
- Low Power: < 650 µA
- Dynamic Power-Down Mode to Reduce Current to 300 µA
- Adaptable to a Very Wide Range of Signal Amplitudes:
  - Total Programmable Gain: 10 kΩ to 4 MΩ
- Integrated Digital Ambient Estimation and Subtraction
Flexible Clocking by External Clock or Crystal:
- Pulse Frequency: 62.5 SPS to 2000 SPS
- Flexible Pulse sequencing and Timing Control
- Input Clock Range: 4 MHz (Min) to 60 MHz (Max)
Integrated Fault Diagnostics:
- Photodiode and LED Open and
  Short Detection
Supplies:
- Rx = 2.0 V to 3.6 V
- Tx = 3.0 V to 5.25 V
Package: Compact DSBGA-36
(3.07 mm × 3.07 mm × 0.5 mm)
Specified Temperature Range: 0°C–20°C to 70°C