Wearable, 16-phase multi-sensor SpO2 and heart rate monitor (HRM) reference design with Bluetooth® 5 TIDA-010029 (ACTIVE)

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Key Document

Description

This reference design enables a wearable, optimized saturation of peripheral capillary oxygen (SpO2) and multi-sensor, multi-wavelength optical heart rate monitor (HRM). It uses AFE4420 device, which is a single-chip, bio-sensing front end for photoplethysmography (PPG) measurements. It supports up to four switching light-emitting diodes (LEDs) and up to four photodiodes to enable signal acquisition of up to 16 Phases. The CC2640R2F device (supporting Bluetooth® low energy 4.2 and 5) transfers the measured data to a remote location. This patient-monitoring design uses a single CR3032 battery with a 30-day life cycle. Raw data is available to calculate heart rate, SpO2, and other related parameters. 2 onboard light-emitting diodes (LEDs) identify low-battery detection and a Bluetooth connection.

Features
  • Provides raw data to calculate heart rate, SpO2, and other related parameters
  • Uses single-chip, bio-sensing, front-end AFE4420 device for PPG measurement
    • Supports up to 4 LEDs and 4 photodiodes with ambient subtraction to improve signal-to-noise ratio (SNR)
    • Enables signal acquisition of up to 16 phases and multi-wavelength measurements with the flexible allocation of LEDs and photodiodes in each phase
  • Integrated Arm® Cortex®-M3 and 2.4-GHz RF transceiver (CC2640R2F) supports wireless data transfer through Bluetooth® low energy 4.2 and 5.0
  • Operates from CR3032 (3-V, 500-mA coin cell battery) with a battery life of 30 days using highly efficient DC/DC converters
  • Small form factor helps in easy adaption to wearable applications

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Design Files

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TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
AFE4420  Ultra-small integrated AFE with FIFO for multisensor wearable optical heart-rate monitoring  Medical AFEs  Not Available View Design Kits & Evaluation Modules
CC2640R2F  SimpleLink Bluetooth® low energy wireless MCU  SimpleLink Solutions  Sample & Buy View Design Kits & Evaluation Modules
TPD1E10B06  Single-channel ESD in 0402 package with 10pF capacitance and 6V breakdown  Circuit protection  Sample & Buy View Design Kits & Evaluation Modules
TPS61099  0.7Vin Synchronous Boost Converter with 800 nA Ultra-Low Quiescent Current  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
TPS63036  High Efficient Single Inductor Buck-Boost Converter with 1-A Switches  Buck-boost & inverting  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
AFE4420 DSBGA (YZ)| 30 Download -
CC2640R2F Download Download
Download Download
Download -
Download Download
TPD1E10B06 Download Download
TPS61099 Download Download
Download -

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Technical Documents

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Application notes (2)
Title Type Size (KB) Date
PDF 8634 10 Jan 2019
PDF 692 02 Mar 2015
User guides (1)
Title Type Size (KB) Date
PDF 7338 17 Mar 2019
Design files (6)
Title Type Size (KB) Date
ZIP 531 23 Oct 2018
ZIP 2741 23 Oct 2018
ZIP 848 23 Oct 2018
ZIP 230 23 Oct 2018
ZIP 139 23 Oct 2018
ZIP 450 23 Oct 2018
Related Tools & Software

Reference Designs  ( 2 )

Design Kits & Evaluation Modules  ( 1 )

Name Part Number Tool Type
SimpleLink™ Bluetooth® Low Energy CC2640R2F wireless MCU LaunchPad™ development kit  LAUNCHXL-CC2640R2  Development Kits 

Software (2)



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