TIDM-EKG-PULSE

Low Power Pulse Oximeter & EKG Reference Design

TIDM-EKG-PULSE

Design files

Overview

This reference design details non-invasive optical plethysmography - pulsoximetry - using the MSP430FG437 microcontroller (MCU). The pulsoximeter consists of a peripheral probe combined with the MCU displaying the oxygen saturation and pulse rate on a LCD glass. The same sensor is used for both heart-rate detection and pulsoximetering in this application. A custom LabVIEW GUI has been developed for this application to display the heart signal, heart rate and % SaO2 number. All the necessary files and steps to get this GUI up and running have been provided along with this report.

Features
  • Single-chip solution with integrated analog front-end for diode drive and measurement
  • USB communication interface for PC connectivity
  • Built-in connectivity for addition of wireless communication using CCxxxx EMK transceivers
  • NellcorTM probe compatible hardware interface
  • Based on original design "A Single-Chip Pulse oximeter Design Using the MSP430" (SLAA274)
  • This application report uses the MOD-PULSE 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 (LabView)

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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.

SLAC618.ZIP (920 K)

Detailed schematic diagram for design layout and components

SLAR080.PDF (292 K)

Detailed schematic diagram for design layout and components

SLAR081.PDF (90 K)

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

SLAC608.ZIP (146 K)

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

Products

Includes TI products in the design and potential alternatives.

MSP430 microcontrollers

MSP430FG4398 MHz MCU with 60KB Flash, 2KB SRAM, 12-bit ADC, Dual DAC, DMA, 3 OpAmp, 128 seg LCD

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS71550mA 24V ultra-low-IQ low-dropout (LDO) voltage regulator

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Application note Revised Pulse Oximeter Design Using the MSP430 Jun. 03, 2010

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