MAX30102 Pulse Oximeter and Heart-Rate Sensor

MAX30102 Pulse Oximeter and Heart-Rate Sensor is a highly integrated optical sensor module that accurately measures heart rate and SpO₂ (blood oxygen saturation) through photoplethysmography. Featuring a compact, I²C-based interface and low-power design, it’s perfect for wearable health devices, fitness trackers, and remote medical monitoring systems.

Key Features:

• Integrated LEDs and Photodetector: Combines IR and red LEDs with photodiode for precise SpO₂ and heart-rate sensing.
• High Sensitivity & Resolution: Supports high sampling rate for accurate readings, even at low perfusion.
• I²C Interface: Standard I²C communication (SDA/SCL) for easy microcontroller integration.
• Low Power Operation: Power-efficient design ideal for battery-powered devices.
• Compact Design: All sensing components enclosed in a small, flat module footprint.

Technical Specifications:

• IR LED Wavelength: ~880 nm
• Red LED Wavelength: ~660 nm
• Sampling Rate: Up to 1000 samples per second
• Resolution: 18-bit ADC
• Supply Voltage: 1.8 V to 3.3 V
• Operating Current: Typical ~600 µA (sample only)
• Interface: I²C (100 kHz / 400 kHz compatible)

Mechanical Specifications:

• PCB Material: FR4, surface-mount configuration
• LED & Photodiode Window: Protected and transparent for optical measurements
• Mounting Style: Solderable header pins or direct SMD footprint

Dimensions:

• Module Size: Approximately 5.6 mm × 2.8 mm × 0.9 mm (sensor area)
• Package Height: Flat design with minimal thickness

Pinout and Wiring:

• VIN / VCC: Connect to 1.8 V–3.3 V regulator supply
• GND: Ground reference
• SDA: I²C data line (use pull-up resistor to VCC)
• SCL: I²C clock line (pull-up resistor required)
• INT: Optional interrupt output (can signal data ready)

Datasheet Reference:

• Search for “MAX30102 datasheet” to find detailed specifications and usage guidelines.

Applications:

• Wearable Health Devices: Fitness trackers, smartwatches
• Remote Medical Monitoring: Home health kits, telemedicine
• Fitness Equipment: Exercise machines with heart-rate monitoring
• Prototyping & Education: Embedded system projects and health sensor learning
• IoT Health Tracking: Connected health monitoring systems

Equivalent Models:

• MAX30100: Predecessor with combined optical sensor; slightly larger and less power-efficient
• MAX30105: Includes ambient light and gesture detection alongside SpO₂ & heart rate
• SFH-7050 + Microcontroller: Discrete IR photodiode solution—requires external parts and processing

Package Includes:

• 1 × MAX30102 Pulse Oximeter and Heart-Rate Sensor