Low Power EKG & Heart Rate Monitor Reference Design, Featuring the MSP430FG439
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This design details how to build a digital heart-rate monitor using a MSP430FG439 microcontroller (MCU). The heartbeat rate per minute is displayed on an LCD and generates a digital data stream via an RS232 serial port to allow EKG waveform display on a PC. The entire application runs using a CR2032 3-V lithium battery.

  • Integrated AFE with external INA for low-power two-chip EKG measurement
  • Low cost PCB-based sensors
  • Integrated segmented LCD display for easy pulse readout
  • GUI application support for display of measured results via PC
  • This application report uses the MOD-EKG Pulse oximeter and Heart-Rate Monitor using the MSP430FG439 development board by OLIMEX Ltd
  • This reference design is tested and includes software, hardware design files, documentation & PC GUI.

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Low Power Heart-Rate & EKG Monitor Reference Design by Olimex



TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA321  MicroPower (40-µA) plus shutdown, 500-µV offset, 10-pA bias, RRO instrumentation amp   Amplifiers  Sample & Buy Not Available
MSP430FG439  16-Bit Ultra-Low-Power MCU, 60KB Flash, 2KB RAM, 12-Bit ADC, Dual DAC, DMA, 3 OPAMP, 128 Seg LCD  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
INA321 Download Download
MSP430FG439 Download Download

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Application notes (1)
Title Type Size (KB) Date
Multiple Files   09 Mar 2018
Design files (4)
Title Type Size (KB) Date
ZIP 1578 12 Jul 2013
PDF 17 27 Jun 2013
PDF 133 27 Jun 2013
ZIP 65 27 Jun 2013
Related Tools & Software

Software (1)

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