Miniaturized Optical Heart Rate Reference Design


Design files


This reference design is for a miniaturized Optical Heart Rate Monitor measurement solution (no chest strap!) specifically targeted for wearable and mobile applications. The small form factor module can easily interface to smartphones, tablets, and wearables. With TI's AFE4403 AFE, you can accelerate and simplify your Optical HRM design while still ensuring measurement performance needed for serious Fitness designs.  This design is a smaller form factor than TIDA-00011.

  • Supports optical heart rate measurement 
  • Features AFE4403 and third party optical sensor module for measuring heart rate
  • Targeted for smart phones, tablets, wearables 
  • MSP430F5528 MCU for holding algorithm for each measurement
  • This design is tested and provides everything you need to complete your design including Schematics, Layout, Gerber files, and BOM
Personal electronics
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU475.PDF (1220 K)

Reference design overview and verified performance test data

TIDR988.PDF (146 K)

Detailed schematic diagram for design layout and components

TIDR989.PDF (73 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDR990.ZIP (832 K)

Detailed overview of design layout for component placement

TIDC551.ZIP (279 K)

Design file that contains information on physical board layer of design PCB

TIDR991.ZIP (406 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Biosensing AFEs

AFE4403Ultra-Small Integrated Analog Front End (AFE) for Heart-Rate Monitors and Low-Cost Pulse Oximeters

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430F552825 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, comparator, DMA, UART/SPI/I2C, USB, HW multiplier

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Design guide Miniaturized Pulse Oximeter Design Guide Aug. 05, 2014

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