Item specifics
Description
MAX30100 Heart Rate Blood Oxygen Sensor Module Product Overview
The MAX30100 heart rate and blood oxygen sensor module is an integrated pulse oximetry and heart rate monitoring solution featuring theMAX30100 chip. The module integrates red and infrared LEDs, a photodetector, optimized optics, and low-noise analog signal processing, communicating with microcontrollers via I2C interface. Operating from 1.8V-3.3V, it measures SpO2 from 70%-100% and heart rate from 30-250bpm. Ultra-low power consumption (<600µA during operation, 0.7µA standby) makes it ideal for wearables, medical monitoring, and fitness devices.
MAX30100 Heart Rate Blood Oxygen Sensor Module Core Features
Integrated Optical Sensor： Combines red LED (660nm) and infrared LED (940nm) with a photodetector to measure blood oxygen saturation and heart rate via light absorption changes in tissue
I2C Digital Interface： Standard I2C protocol (fixed address 0x57) uses only SCL/SDA lines; INT interrupt pin for event triggering
Ultra-Low Power Operation： 1.9mA typical supply current, <600µA during measurement, only 0.7µA typical shutdown current – ideal for battery-powered wearables
Wide Supply Voltage： Operating range 1.8V-5.5V (3.3V typical), compatible with both 5V and 3.3V microcontrollers without level shifting
High Sample Rate & Fast Output： Programmable sample rate and high-speed data output for capturing weak pulse signals; high SNR and motion artifact resilience
Integrated Ambient Light Cancellation： Built-in ambient light rejection circuit reduces environmental interference for improved measurement accuracy
Integrated Temperature Sensor： On-chip temperature sensor for calibration to enhance measurement precision
Compact Form Factor： Small module footprint for easy integration into portable devices
MAX30100 Heart Rate Blood Oxygen Sensor Module Applications
Wearable Devices： Smart bands, smart watches, and other wearable health monitors
Medical Monitoring Devices： Home-use pulse oximeters, health monitors, telemedicine terminals
Fitness Assistant Devices： Sports heart rate monitors, fitness trackers
Health Monitoring Systems： Real-time heart rate/SpO2 monitoring for elderly/patient care
DIY Maker Projects： Heart rate/SpO2 sensing with Arduino, ESP8266, ESP32, Raspberry Pi
Educational Labs： Biomedical engineering and embedded systems coursework
MAX30100 Heart Rate Blood Oxygen Sensor Module Key Advantages
High Integration Simplifies Design： Single-chip solution integrating LEDs, photodetector, optics, and analog front-end eliminates complex discrete designs
Ultra-Low Power Extends Battery Life： 1.9mA operation, 0.7µA standby – significantly extends runtime for wearables and portable medical devices
Plug-and-Play Fast Integration： I2C interface + robust Arduino/C/C++ libraries get you from zero to heart rate/SpO2 data in minutes
High-Precision Optical Measurement： Optimized optics and low-noise AFE deliver high SNR; integrated ambient light cancellation ensures reliable data in complex lighting conditions
Wide Voltage Compatibility： 1.8V-5.5V supply works with both 3.3V and 5V MCUs – no level shifters needed
Compact Size for Portables： Ultra-small footprint fits easily into space-constrained wearables and medical devices
Mature Software Ecosystem： Official datasheets/app notes + rich open-source Arduino/MicroPython/STM32 libraries and examples
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FAQ:
What is the MAX30100 sensor module and its key features?
The MAX30100 is an integrated pulse oximetry and heart‑rate monitor module from Analog Devices (formerly Maxim Integrated). It combines red (660 nm) and infrared (880 nm) LEDs, a photodetector, and a low‑noise analog front‑end. Key specs: 16‑bit ADC, programmable sample rate from 50 sps to 1000 sps, a 16‑sample FIFO buffer, and an I2C interface (7‑bit address 0x57). The module operates on a single 3.3 V to 5 V supply via an on‑board regulator, making it easy to use with Arduino and ESP32. It is widely used in wearables, fitness bands, and health monitoring projects for optical heart rate and SpO₂ measurement.
How does the MAX30100 differ from the MAX30102? Which one is better?
The MAX30102 is the newer generation and offers several improvements over the MAX30100. The MAX30102 provides a wider sample rate range (50 sps – 3200 sps) compared to the MAX30100’s 50 sps – 1000 sps, a 32‑sample FIFO (vs. 16), and better signal‑to‑noise ratio (SNR) with enhanced ambient light rejection. The MAX30102 also supports an integrated glass cover for mechanical robustness. Power consumption is similar, but the MAX30102 typically delivers more stable readings, especially under motion. If you are starting a new design, the MAX30102 is the recommended choice; the MAX30100 is still widely used and perfectly capable for basic heart‑rate and SpO₂ experiments.
How do I connect the MAX30100 to an Arduino or ESP32?
Wiring uses the I2C bus. Connect VIN → 3.3 V or 5 V (the module has an internal LDO), GND → GND, SDA → A4 (Arduino Uno) or GPIO21 (ESP32), and SCL → A5 (Arduino Uno) or GPIO22 (ESP32). The INT pin is optional and can be connected to any digital input if you want interrupt‑driven data reading. The module’s I2C logic is 3.3 V compatible, so when connecting to a 5 V Arduino, the SDA/SCL lines are typically safe because the on‑board pull‑ups are to 3.3 V, but for maximum reliability on 5 V systems you can use a logic‑level converter.
What is the operating voltage and power consumption of the MAX30100?
The module accepts a supply voltage of 3.3 V to 5 V via the VIN pin, regulated down to 1.8 V and 3.3 V internally for the sensor. Current consumption depends on the LED pulse amplitude and sample rate. With typical settings, the average current is around 2 mA – 10 mA. In standby mode, the quiescent current drops to about 0.7 µA, making it suitable for battery‑operated portable devices. To save power, you can reduce the LED current or sample rate in software.
How accurate is the MAX30100 for heart rate and SpO₂?
The MAX30100 provides raw PPG (photoplethysmogram) signals; the final accuracy depends heavily on the algorithm used and sensor placement. With a well‑tuned algorithm, it can achieve approximately ±2 bpm heart rate accuracy and ±2 % SpO₂ for resting, healthy individuals. However, it is not intended for medical diagnosis. Motion artifacts, poor finger contact, and ambient light leakage will degrade readings. Many open‑source libraries include simple algorithms that work reasonably well for educational and fitness applications.
What libraries and example code are available for the MAX30100?
Popular Arduino libraries include the MAX30100lib by OXullo Interscambri and the SparkFun MAX3010x library (which also supports the MAX30100 with some modifications). These libraries handle I2C communication, FIFO reading, and provide basic heart‑rate and SpO₂ calculation examples. After installing the library, you can run the sample sketch to see raw IR and red values. For ESP32, the same libraries work well; just ensure you use the correct I2C pins and call Wire.begin() appropriately.
Why does my MAX30100 sometimes give unstable readings or not work?
Common causes: 1) Motion artifacts — even slight finger movement disrupts the optical path. 2) Poor sensor‑skin contact — press the finger firmly and evenly against the sensor; a rubber strap can help. 3) Ambient light leaking in — shield the sensor from room light, especially sunlight and fluorescent lamps. 4) Incorrect LED current settings — too low and the signal is weak; too high and the ADC saturates. Adjust the LED pulse amplitude in the library settings. 5) Power supply noise — add a 10 µF capacitor between VIN and GND close to the module.
Can the MAX30100 measure blood pressure?
No. The MAX30100 measures photoplethysmography (PPG) signals, which can be used to estimate heart rate and blood oxygen saturation. Blood pressure estimation from PPG is an active research area, but the MAX30100 alone cannot provide calibrated blood pressure values. Additional sensors and complex algorithms (often with machine learning) are required, and the accuracy is not guaranteed for clinical use.
What is the maximum sampling rate and FIFO depth of the MAX30100?
The ADC can sample from 50 samples per second (sps) up to 1000 sps. The internal FIFO buffer holds up to 16 samples, each containing both IR and red data. When the FIFO is almost full, the INT pin can be configured to generate an interrupt, allowing the host microcontroller to read a block of data at once and then return to sleep, which is very useful for low‑power designs.
What are the most typical applications of the MAX30100?
It is commonly used in wearable health trackers, smart watches, fitness bands, portable pulse oximeters, IoT health monitoring nodes, and embedded biomedical projects. Its low cost, small size, and I2C interface make it a popular choice for prototyping heart rate and oxygen saturation measurement systems in both education and research.