MAX30100/30102 Heart Rate Oxygen Pulse Sensor

MAX30102 Heart Rate and Pulse Oximeter Sensor Module (SpO₂ Monitoring)

The MAX30102 Sensor Module is a highly integrated, low-power biosensor designed for measuring Heart Rate (HR) and Pulse Oximetry (SpO₂)—the concentration of oxygen in the blood. This optical sensor combines Red and Infrared LEDs, a photodetector, and sophisticated low-noise analog signal processing circuitry into a compact, specialized package.

It operates using the Photoplethysmogram (PPG) method, emitting light through the skin (typically the finger or earlobe) and measuring the light absorbed by the pulsating blood. The module's ultra-low power consumption and I2C interface make it the gold standard for developing battery-operated wearable devices and mobile health monitoring systems. It also features an onboard temperature sensor used for crucial measurement compensation.

 

🔧 Key Features  

• Function: Measures Heart Rate and Blood Oxygen Saturation (SpO₂).
   
• Sensing Method:Photoplethysmogram (PPG) using reflective optics.
   
• Wavelengths: Red LED (660 nm) and Infrared LED (880 nm) for oximetry calculations.
   
• Interface: Digital I2C protocol (compatible with 3.3V and 5V logic).
   
• Power Efficiency: Ultra-low shutdown current (0.7 µA typical) and programmable power modes.
   
• Data Management: Includes an onboard 16-bit ADC and a 32-sample FIFO buffer to offload the microcontroller.
   
• Robustness: Integrated ambient light rejection and motion artifact resilience for high Signal-to-Noise Ratio (SNR).
  

💡 Applications

• Development of Smart Watches and Fitness Trackers (Wearable Health).
   
• Medical Monitoring Devices and portable pulse oximeters.
   
• Health Monitoring systems for home or research environments.
   
• Educational and hobbyist projects focused on Biometric Data Acquisition.
 

 

⚙️ Technical Specifications

                                                                   

Sensor Model	MAX30102 (Upgraded from MAX30100)
Measurements	Heart Rate (HR) and Oxygen Saturation (SpO₂)
Communication	I2C Digital Interface ($\leq 400$ kHz)
Operating Voltage (Module)	3.3V to 5V DC
Operating Temperature	-40°C to +85°C
Current (Measurement)	$\approx 600$ µA to $1200$ µA (depending on sample rate)
Shutdown Current	0.7 µA (Typical, permits always-on power)
ADC Resolution	18-bit

 

📦 Package Includes   

• 1 × MAX30102 Heart Rate and Pulse Oximeter Sensor Module
   
• 1 × Header Pin Set (Unsoldered)