Product Introduction

MAX30102 is an integrated module for pulse oximeters and monitoring biosensors. It integrates a red LED and an infrared LED, a photodetector, optical components, and low-noise electronic circuits with ambient light suppression. The MAX30102 uses a 1.8V power supply and an independent 5.0V power supply for internal LEDs for wearable devices for heart rate and blood oxygen monitoring: worn on fingers, earlobes, wrists, and other areas. The standard and 12C compatible communication interface can transmit the collected values to microcontrollers such as Arduino and Kl25Z for heart rate and blood oxygen calculation. In addition, the chip can also achieve a standby current close to zero by turning off the module through software, ensuring that the power supply is always maintained.

Product working principle

1. Photolysis method: using the difference in light transmittance caused by human tissue during vascular pulsation to measure pulse and blood oxygen saturation

2. Light source: using oxygenated hemoglobin (Hb02) and hemoglobin in arterial blood (Hb) Selective light emitting diodes with specific wavelengths

3. The transmittance is converted into an electrical signal, and the arterial pulse congestion volume leads to a change in the transmittance of light. At this time, the light reflected by human tissue is received by photoelectric conversion, converted into an electrical signal, and amplified

output.

Product parameters

Product Name: MAX30102 Heart Rate Module

LED peak wavelength analyzer: 660nm/880nm

LED power supply voltage: 3.3~5V

Detection signal type: Light Reflection Signal (PPG)

Output signal interface: 12C interface

Communication interface voltage: 1.8~3.3V~5V (optional)

Product Pin Description

VIN: Main power input terminal, 1.8V-5V

3-digit pad: Select the pull level on the bus, depending on the pin master

Voltage options include 18V terminal or 3.3V terminal (including 3.3V and above)

SCL: Clock connected to L2C bus

SDA: Connect data to L2C bus

Interrupt pin of NT: MAX30102 chip

RD: The RED LED ground terminal of the MAX30102 chip is generally not connected

IRD: The RLED ground terminal of MAX30102 chip is generally not connected

GND: ground wire

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