MAX30102 Heart Rate and Pulse Oximeter Sensor

The MAX30102 is an integrated pulse oximetry and heart-rate monitor module. It includes internal LEDs, photodetectors, optical elements, and low-noise electronics with ambient light rejection. Here are the detailed specifications and features of the MAX30102 module:

Specifications

• Power Supply Voltage: Operating Voltage: 1.8V and 3.3V for LEDs
• Current Consumption: Idle mode: 0.7µA / Active mode: Varies with configuration, typically around 600µA to 1.8mA for heart rate measurement
• Measurement Range:
  • Heart rate: 30 to 240 beats per minute (bpm)
  • SpO2 (blood oxygen level): 0% to 100%
• LED Wavelengths:
  • Red LED: 660 nm
  • Infrared LED: 880 nm
• Communication Interface:
  • I2C (Inter-Integrated Circuit) protocol
  • I2C Address: 0x57 (7-bit)
• Dimensions: Small form factor, typically around 14mm x 14mm

Pin Configuration

• VIN: Power supply input (1.8V to 5.5V)
• GND: Ground
• SCL: I2C clock
• SDA: I2C data
• INT: Interrupt output (optional)
• RD: Red LED power (optional, can be left unconnected if not used)
• IR: Infrared LED power (optional, can be left unconnected if not used)

Features

• Heart Rate Monitoring: Measures heart rate using photoplethysmography (PPG) by detecting blood volume changes in the microvascular bed of tissue.
• Pulse Oximetry: Measures SpO2 (blood oxygen saturation) by using red and infrared LEDs to measure the amount of oxygenated and deoxygenated hemoglobin.
• Low Power Consumption: Optimized for battery-powered applications with ultra-low power consumption.
• High Sensitivity: High-sensitivity photodetectors ensure accurate measurements even with low perfusion.
• Ambient Light Rejection: Built-in ambient light cancellation for accurate readings under various lighting conditions.
• I2C Communication: Simple communication with microcontrollers via the I2C protocol.

A module datasheet can be found here.