Microchip Technology Inc
Menu

Pulse Oximeter

Solution

pulse oximeter is a non-invasive electro-optical device for measuring both the heart rate and the degree to which the hemoglobin in one’s blood has been saturated with oxygen. This quantity is inferred by measuring the optical transmittance of perfused skin in different wavelengths of light. Red, green and infrared LEDs are convenient and common light sources. Blood oxygen saturation can be determined by comparing the values of Oxy-hemoglobin to Deoxy-hemoglobin. One method for doing this is by shining both a red LED and an infrared LED into a body part (such as a finger or wrist), and then measuring and comparing the relative intensities of the light from each LED in terms of a ratio. This ratio is then typically expressed as the percentage of oxygen saturation.

Pulse oximeter designs call for low power consumption and extensive analog and digital filtering. They are often implemented both as stand-alone medical and fitness devices as well as components of more comprehensive vital sign monitoring systems.

Microchip has what pulse oximeter designers need:

  • Our dsPIC® Digital Signal Controllers provide high performance digital filtering of optical noise from external light sources and movement.
  • Lower cost of development with our world-class integrated development tools, MPLAB® X IDE, which encapsulates coding, debugging, software simulation, hardware emulation and device programming in a single interface.
  • Low-offset, low-noise op amps for amplification and conditioning of photodiode output.
  • Agency-certified Bluetooth®, Bluetooth Smart and Wi-Fi® modules for fast integration with existing wireless networks.

Pulse Oximeter Demo Design Files

Check out the design files for a low cost, high-performance pulse oximeter demo

Click here for more information
Tabs / Medical / Pulse Oximeter
Products
Documentation
PIC® Microcontrollers
XLP Extreme Low Power + High Performance + Touch Channels Integrated LCD + Touch Channels + XLP Extreme Low Power + High Performance Integrated USB + Touch Channels High Performance DSP + 12-Bit ADC Ultra High Performance DSP + 12-Bit ADC + Op Amps
PIC24F08KL402 PIC24FJ64GA310 PIC24FJ192GB108 dsPIC33FJ128GP802 dsPIC33EP256GP504
PIC24F08KM202 PIC24FJ128GA306
PIC24FJ128GC010


Signal Conditioning
Op Amp Instrumentation
Amp
ADC SAR ADC
Delta Sigma
DAC
MCP6421 MCP6N11 MCP3021 MCP3421 MCP4725
MCP6V11 MCP6N16 MCP3221 MCP3425 MCP4821
MCP6031 MCP3301 MCP3551 MCP4921
MCP6441
Power Management
Battery Management Switching Regulators LDO Regulators Security and Authentication Wireless
MCP73811 MCP1640 MCP1710 PIC12F636 RN42
MCP73123 MCP16251 MCP1703A MCP2035 MRF89XAM8A
MCP73871 MCP1624 MCP1754 RN4020
MCP16301 MCP1755
MCP16321
 

Medical Video Channel