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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 Signal Controller (DSC)

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC MCU 16BIT 128KB FLASH 28QFNDSPIC33FJ128GP802-E/MMIC MCU 16BIT 128KB FLASH 28QFN199 - ImmediateView Details
IC MCU 16BIT 128KB FLASH 28SOICDSPIC33FJ128GP802-E/SOIC MCU 16BIT 128KB FLASH 28SOIC274 - ImmediateView Details
IC MCU 16BIT 128KB FLASH 28SPDIPDSPIC33FJ128GP802-E/SPIC MCU 16BIT 128KB FLASH 28SPDIP1644 - ImmediateView Details
IC MCU 16BIT 128KB FLASH 28QFNDSPIC33FJ128GP802-I/MMIC MCU 16BIT 128KB FLASH 28QFN0View Details
IC MCU 16BIT 128KB FLASH 28SOICDSPIC33FJ128GP802-I/SOIC MCU 16BIT 128KB FLASH 28SOIC398 - ImmediateView Details

Digital-to-Analog Converter (DAC)

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC DAC 12BIT V-OUT 10MSOPMCP4728T-E/UNIC DAC 12BIT V-OUT 10MSOP0View Details
IC DAC 12BIT V-OUT 10MSOPMCP4728-E/UNIC DAC 12BIT V-OUT 10MSOP0View Details
IC DAC 12BIT V-OUT 10MSOPMCP4728A1T-E/UNIC DAC 12BIT V-OUT 10MSOP0View Details
IC DAC 12BIT V-OUT 10MSOPMCP4728A1-E/UNIC DAC 12BIT V-OUT 10MSOP0View Details
IC DAC 12BIT V-OUT 10MSOPMCP4728A0-E/UNIC DAC 12BIT V-OUT 10MSOP0View Details

Synchronous Boost Regulator

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC REG BOOST ADJ 350MA SOT23-6MCP1640BT-I/CHYIC REG BOOST ADJ 350MA SOT23-60View Details
IC REG BOOST ADJ 350MA SOT23-6MCP1640BT-I/CHYIC REG BOOST ADJ 350MA SOT23-60View Details
IC REG BOOST ADJ 350MA SOT23-6MCP1640BT-I/CHYIC REG BOOST ADJ 350MA SOT23-60View Details
IC REG BOOST ADJ 350MA 8DFNMCP1640BT-I/MCIC REG BOOST ADJ 350MA 8DFN1636 - ImmediateView Details
IC REG BOOST ADJ 350MA 8DFNMCP1640BT-I/MCIC REG BOOST ADJ 350MA 8DFN1636 - ImmediateView Details

Operational Amplifier

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC OPAMP GP 2 CIRCUIT 8SOICMCP6002T-I/SNIC OPAMP GP 2 CIRCUIT 8SOIC515 - ImmediateView Details
IC OPAMP GP 2 CIRCUIT 8MSOPMCP6002T-I/MSIC OPAMP GP 2 CIRCUIT 8MSOP0View Details
IC OPAMP GP 2 CIRCUIT 8MSOPMCP6002T-E/MSIC OPAMP GP 2 CIRCUIT 8MSOP0View Details
IC OPAMP GP 2 CIRCUIT 8SOICMCP6002-I/SNIC OPAMP GP 2 CIRCUIT 8SOIC11083 - ImmediateView Details
IC OPAMP GP 2 CIRCUIT 8SOICMCP6002T-E/SNIC OPAMP GP 2 CIRCUIT 8SOIC253 - ImmediateView Details
Published: 2020-05-14