Keep a finger on the pulse with Maxims reference design 220

January 22, 2020 //By Wisse Hettinga
Keep a finger on the pulse with Maxims reference design 220
Finger heart rate and pulse oximeter smart sensor with digital signal processing

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.

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

MAX30101 Heart Rate Monitor and Pulse Oximeter features are:

  • 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

And 3-Axis Accelerometer to compensate for motion artifacts

Find all the product information at


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