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.