System Board 6663

MAXREFDES1043: How to Monitor SpO2 Levels Using the MAX30102


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The MAXREFDES1043 is designed for SpO2 measurements based on Maxim’s new-generation biosensor—the MAX30102. The MAXREFDES1043 is a high-accuracy, low-power, small-size, and easily implemented design that can monitor SpO2 levels using red and IR LEDs. 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. The MAX30102 provides a complete system solution to ease the design-in process for mobile and wearable devices. It operates on a single 1.8V power supply and a separate 3.3V power supply for the internal LEDs. Communication is through a standard I2C-compatible interface. The module can be shut down through software with zero standby current, allowing the power rails to remain powered at all time.

Key Features

  • Integrated solution
  • Small size
  • Low power
  • High accuracy
MAXREFDES1043 hardware top (above) and bottom (below). Enlarge+


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Designed, Built, Tested

This document describes the hardware shown in Figure 1. It provides a detailed systematic technical guide to design in a small, low-power, high-accuracy SpO2 monitor. The design has been built and tested, details of which follow later in this document.

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MAX30102
High-Sensitivity Pulse Oximeter and Heart-Rate Sensor for Wearable Health

  • Heart-Rate Monitor and Pulse Oximeter Biosensor in LED Reflective Solution
  • Tiny 5.6mm x 3.3mm x 1.55mm 14-Pin Optical Module
  • Ultra-Low Power Operation for Mobile Devices