Microchip Technology

Pulse Oximeter Designs

Microchip's pulse oximeter is intended for home medical use and by integrated wrist-worn fitness activity trackers

Image of Microchip's Pulse Oximeter DesignsMicrochip has medical products geared toward medical applications, including pulse oximeters. The ability to measure heart rate and blood oxygen level is being added to consumer products. These measurements can be taken using pulse oximeters that are intended for home medical use and by integrated wrist-worn fitness activity trackers. A pulse oximeter is 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 Microchip's pulse oximeter demonstration transmit two wavelengths of light through a finger to a photodetector. From this, the pulse oximeter demonstration 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.

Resources

Features
  • Measures heart rate
  • Measures percent blood oxygen saturation level
  • dsPIC33FJ128GP802 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
  • MCP1640 boost regulator, MCP4728 DAC, and the MCP6002 dual op amp used in the design for reliable and accurate power management and signal conditioning

Digital-to-Analog Converter (DAC)

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
IC DAC 12BIT V-OUT 10MSOPMCP4728T-E/UNIC DAC 12BIT V-OUT 10MSOP24360 - Immediate$2.50View Details
IC DAC 12BIT V-OUT 10MSOPMCP4728-E/UNIC DAC 12BIT V-OUT 10MSOP4742 - Immediate$2.50View Details
IC DAC 12BIT V-OUT 10MSOPMCP4728A1T-E/UNIC DAC 12BIT V-OUT 10MSOP2886 - Immediate$2.50View Details
IC DAC 12BIT V-OUT 10MSOPMCP4728A1-E/UNIC DAC 12BIT V-OUT 10MSOP504 - Immediate$2.50View Details
IC DAC 12BIT V-OUT 10MSOPMCP4728A0-E/UNIC DAC 12BIT V-OUT 10MSOP927 - Immediate$2.50View Details

Synchronous Boost Regulator

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
IC REG BOOST ADJ 350MA SOT23-6MCP1640BT-I/CHYIC REG BOOST ADJ 350MA SOT23-617855 - Immediate$0.77View Details
IC REG BOOST ADJ 350MA SOT23-6MCP1640BT-I/CHYIC REG BOOST ADJ 350MA SOT23-617855 - Immediate$0.77View Details
IC REG BOOST ADJ 350MA SOT23-6MCP1640BT-I/CHYIC REG BOOST ADJ 350MA SOT23-617855 - Immediate$0.77View Details
IC REG BOOST ADJ 350MA 8DFNMCP1640BT-I/MCIC REG BOOST ADJ 350MA 8DFN6276 - Immediate$0.81View Details
IC REG BOOST ADJ 350MA 8DFNMCP1640BT-I/MCIC REG BOOST ADJ 350MA 8DFN6276 - Immediate$0.81View Details

Operational Amplifier

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
IC OPAMP GP 2 CIRCUIT 8SOICMCP6002T-I/SNIC OPAMP GP 2 CIRCUIT 8SOIC31367 - Immediate$0.41View Details
IC OPAMP GP 2 CIRCUIT 8MSOPMCP6002T-I/MSIC OPAMP GP 2 CIRCUIT 8MSOP66046 - Immediate$0.41View Details
IC OPAMP GP 2 CIRCUIT 8MSOPMCP6002T-E/MSIC OPAMP GP 2 CIRCUIT 8MSOP36700 - Immediate$0.44View Details
IC OPAMP GP 2 CIRCUIT 8SOICMCP6002-I/SNIC OPAMP GP 2 CIRCUIT 8SOIC39220 - Immediate$0.31View Details
IC OPAMP GP 2 CIRCUIT 8SOICMCP6002T-E/SNIC OPAMP GP 2 CIRCUIT 8SOIC6676 - Immediate$0.44View Details
Published: 2020-05-14

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