Microchip Technology Pulse Oximeter

Microchip Technology Pulse Oximeter Reference Design demonstrates the implementation of a device that uses a non-invasive method for measuring the oxygen saturation level of a person's blood, as well as their heart rate. LEDs in the Pulse Oximeter from Microchip Technology transmit two wavelengths of light through a finger to a photodetector. From this, the Pulse Oximeter can measure changing absorbance at each of the two wavelengths, process, and then filter the data to determine the blood oxygen saturation level and heart rate.

Features

Measures heart rate
Measures percent blood oxygen saturation level
dsPIC33FJ128GP802 Digital Signal Processor uses a 513th-order, digital-FIR, bandpass filter designed with Microchip's Digital Filter Design Tool
Eliminates the need for an expensive Analog Front End (AFE) part

Low overall BOM cost due to processing and filter integration
Integrated PWM module drives the LCD display
MCP1640 Boost Regulator, MCP4728 DAC, and MCP6002 Dual Op-Amp used in the design for reliable and accurate power management and signal conditioning