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Wrist-Based SpO2, HR, and HRV Health Sensor Platform

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This health sensor band platform is a wrist-worn wearable form factor that demonstrates the high sensitivity and algorithm processing functions for health-sensing applications. It includes an enclosure and a biometric sensor hub with an embedded algorithm for heart rate and SpO2 (blood oxygen saturation) which processes PPG (Photoplethysmography) signals from the analog-front-end (AFE) sensor.

Algorithm output and raw data can be streamed through Bluetooth to an Android app or PC GUI for demonstration, evaluation, and customized development.

  • Micro board
    • MAX32630 microcontroller
    • MAX20303 power-management IC (PMIC)
    • Dual-mode Bluetooth┬« connection
    • Tri-color status LED
  • Sensor board
    • MAX86141 analog front-end and optical heart rate sensor with one green LEDs, one red LED, one IR LED, and two photodiodes
    • MAX32664 microcontroller with embedded heart-rate algorithm
    • Three-axis accelerometer
    • MAX4740 quad SPDT switch which, in combination with the MAX86140/41, enables different LED and PD configurations
    • One green LED, two combination RGB LEDs (One of these RGB LEDs is currently not used by the algorithm. The extra LED is reserved for future use: To simplify the design, the extra LED and the MAX4740 may be removed for the heart rate, SpO2 use case.)
  • MAXDAP Pico Adapter board to be used during a firmware upgrade for the micro board
  • Two USB Micro-B cables for firmware upgrade of the micro board or for PC communication with the micro board or charging of the health sensor band
  • Health sensor band enclosure
  • Battery
  • One USB Type-C cable for PC communication with the micro board (Windows 7 or Windows 10) or charging of the health sensor band

Additional requirements:

  • PC (Windows 10 only) with Bluetooth connection for data streaming and logging
  • Android device with Bluetooth connection for data streaming and logging
  • Photoplethysmography (PPG)
  • Wrist-based embedded heart rate, blood oxygen saturation (SpO2) algorithm
  • Heart rate variability (HRV), respiration rate, sleep quality library algorithm
  • Wearable health band form factor
  • MAX32664 sensor hub
  • MAX86141 PPG analog front-end
  • 3-axis accelerometer
  • Window and Android GUIs

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