Finger heart rate and pulse oximeter smart sensor with digital signal processing

Finger heart rate and pulse oximeter smart sensor with digital signal processing


The MAX77860 is a high-performance single input switch mode charger that features USB Type-C CC detection capability in addition to reverse boost capability and a Safeout LDO.

The MAXREFDES220# reference design provides everything you need to quickly prototype your product to measure finger-based heart rate and blood oxygen saturation level (SpO2).

The MAX30101 and the MAX32664 provide an integrated hardware and software solution for multiple finger-based applications. The MAX32664 firmware provides digital signal processing to process the data. The reference design also includes a tri-axis accelerometer to compensate for motion artifacts.

Key features

  • MAX30101 Heart Rate Monitor and Pulse Oximeter
    • Tiny 5.6mm × 3.3mm × 1.55mm 14-Pin Optical Module
    • Integrated Cover Glass for Optimal, Robust Performance
    • Ultra-Low Power Operation for Mobile Devices (< 1mW)
    • Programmable Sample Rate and LED Current for Power Savings
    • High SNR (Signal-to-Noise) ratio, typically greater than 80dB
  • MAX32664 Sensor Hub
    • Maxim-licensed firmware provides complete algorithmic support for finger heart rate and blood oxygen saturation calculations
    • Communicates with host controller over industry standard I2C interface
    • Secure firmware updates authenticated by dedicated bootloader
  • 3-Axis Accelerometer Provides Greater Accuracy
    • Compensates for motion artifacts

A MAX32630FTHR is provided to emulate a host system for easy development.

Design files, firmware, and software can be found on the Design Resources tab. The board is also available for purchase.

About mixos

Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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