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IR LED
LED Wavelength: 870 to 900 nm (avg. 880 nm)
Forward Voltage: 1.4V
Radiant Power: 6.5 mW
LED Driver Current: 0 to 50 mA (programmable)
Red LED
LED Wavelength: 650 to 670 nm (avg. 660 nm)
Forward Voltage: 2.1V
Radiant Power: 9.8 mW
LED Driver Current: 0 to 50 mA (programmable)
Photodetector
Spectral Range of Sensitivity: 600 to 900 nm
Radiant Sensitive Area: 1.36 mm
I C Address
0xAE - Write Address
0xAF - Read Address
What are Heart-Rate and Oxygen Saturation?
Heart-rate is the speed at which your heart pumps blood through your body. Pulse oximetry is a noninvasive
method of determining saturation of oxygen in your blood. However, this is a peripheral measurement is not
always a direct reflection of the arterial oxygen saturation (SaO ), but two are correlated enough for clinical
purposes. There are a multitude of applications for these measurements; especially, in the medical field.
Here are some examples of studies using HR monitoring and pulse oximetry:
Accuracy of pulse oximeters in estimating heart rate at rest and during exercise
Pulse oximetry: Understanding its basic principles facilitates appreciation of its limitations
Experiment: Exercise, Blood Pressure, and Oxygen Saturation Levels
Here are additional resources on how the MAX30102 functions for HR detection and pulse oximetry:
AN6410: Signal to Noise Ratio (PDF)
AN6433: Depth Penetration for Biosensors (PDF)
Maxim: Open Source Heart Rate Algorithm (Arduino)
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