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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
Microchip 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
- 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)
| Image | Manufacturer Part Number | Description | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|
 |  | DSPIC33FJ128GP802-E/MM | IC MCU 16BIT 128KB FLASH 28QFN | 793 - Immediate | $7.77 | View Details |
|  | DSPIC33FJ128GP802-E/SO | IC MCU 16BIT 128KB FLASH 28SOIC | 123 - Immediate | $7.63 | View Details |
|  | DSPIC33FJ128GP802-E/SP | IC MCU 16BIT 128KB FLASH 28SPDIP | 103 - Immediate | $8.26 | View Details |
| | DSPIC33FJ128GP802-I/MM | IC MCU 16BIT 128KB FLASH 28QFN | 0 - Immediate | $7.09 | View Details |
| | DSPIC33FJ128GP802-I/SO | IC MCU 16BIT 128KB FLASH 28SOIC | 800 - Immediate | $6.94 | View Details |
Digital-to-Analog Converter (DAC)
| Image | Manufacturer Part Number | Description | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|
|  | MCP4728T-E/UN | IC DAC 12BIT 10-MSOP | 19958 - Immediate | $2.50 | View Details |
| | MCP4728-E/UN | IC DAC 12BIT 10-MSOP | 10076 - Immediate | $2.50 | View Details |
| | MCP4728A1T-E/UN | IC DAC 12BIT 10-MSOP | 3623 - Immediate | $2.50 | View Details |
| | MCP4728A1-E/UN | IC DAC 12BIT 10-MSOP | 636 - Immediate | $2.50 | View Details |
| | MCP4728A0-E/UN | IC DAC 12BIT 10-MSOP | 745 - Immediate | $2.50 | View Details |
Synchronous Boost Regulator
| Image | Manufacturer Part Number | Description | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|
|  | MCP1640BT-I/CHY | IC REG BOOST ADJ 350MA SOT23-6 | 11247 - Immediate | $0.77 | View Details |
| | MCP1640BT-I/CHY | IC REG BOOST ADJ 350MA SOT23-6 | 11247 - Immediate | $0.77 | View Details |
| | MCP1640BT-I/CHY | IC REG BOOST ADJ 350MA SOT23-6 | 11247 - Immediate | $0.77 | View Details |
|  | MCP1640BT-I/MC | IC REG BOOST ADJ 350MA 8DFN | 8354 - Immediate | $0.81 | View Details |
| | MCP1640BT-I/MC | IC REG BOOST ADJ 350MA 8DFN | 8354 - Immediate | $0.81 | View Details |
Operational Amplifier
| Image | Manufacturer Part Number | Description | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|
|  | MCP6002T-I/SN | IC OP AMP 2CH 8-SOIC | 62370 - Immediate | $0.41 | View Details |
|  | MCP6002T-I/MS | IC OP AMP 2CH 8-MSOP | 104244 - Immediate | $0.41 | View Details |
| | MCP6002T-E/MS | IC OP AMP 2CH 8-MSOP | 42499 - Immediate | $0.44 | View Details |
| | MCP6002-I/SN | IC OP AMP 2CH 8-SOIC | 11907 - Immediate | $0.41 | View Details |
| | MCP6002T-E/SN | IC OP AMP 2CH 8-SOIC | 25790 - Immediate | $0.44 | View Details |
