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.
This board is not available for purchase.
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.