1 Features

• Transmitter:
  • Supports Common Anode LED Configuration
  • Dynamic Range: 100 dB
  • 8-Bit Programmable LED Current to 50 mA (Extendable to 100 mA)
  • Programmable LED On-Time
  • Simultaneous Support of 3 LEDs for Optimized SpO₂, HRM, or Multi-Wavelength HRM
• Receiver:
  • Supports 2 Time-Multiplexed Photodiode Inputs
  • 24-Bit Representation of the Current Input from the Photodiode in Twos Complement Format
  • Individual DC Offset Subtraction DAC
    (±15.75-µA Range) at TIA Input for Each LED, Ambient
  • Digital Ambient Subtraction at ADC Output
  • Transimpedance Gain: 10 kΩ to 2 MΩ
  • Dynamic Range: 100 dB
  • Dynamic Power-Saving Mode to Reduce Receiver Current to 200 µA
• Pulse Frequency: 5 SPS to 1000 SPS
• Flexible Pulse Sequencing and Timing Control
• Flexible Clock Options:
  • External Clocking:
    4-MHz to 60-MHz Input Clock
  • Internal Clocking: 4-MHz Oscillator
• FIFO with 240 Sample Depth:
  • Programmable Partitioning Across Phases
• I²C, SPI Interfaces: Selectable by Pin
• Operating Temperature Range: –20°C to +70°C
• 2.6-mm × 2.1-mm DSBGA, 0.4-mm Pitch
• Supplies: Rx: 2 V to 3.6 V, Tx: 3 V to 5.25 V,
  IO: 1.8 V to 3.6 V