MAX30100 Heart-Rate Sensor IC : Specification, Pinout and Datasheet

MAX30100 is a Pulse Oximeter and Heart-Rate Sensor IC which is used to check the health of a person with any condition that affects blood oxygen levels, such as Heart Attack, Heart failure, Lungs Cancer Asthma, etc. 

The MAX30100 operates from 1.8V and 3.3V power supplies and can be powered down through software with negligible standby current, permitting the power supply to remain connected at all times. 

The sensor comprises two Light Emitting Diodes, a photodetector, and a series of low noise signal processing devices to detect heart rate and to perform pulse oximetry.

MAX30100 Pinout

MAX30100 Pin Description

●Operating Voltage - 1.8V to 3.3V

●Input Current - 20mA

●Integrated Ambient Light Cancellation

●High Sample Rate Capability

●Fast Data Output Capability

MAX30100 Functional Diagram

System Block Diagram

As the system block diagram is shown, there should be a small distance between the sensor and finger.

● Complete Pulse Oximeter and Heart-Rate Sensor Solution Simplifies Design

• Integrated LEDs, Photo Sensor, and High-Performance Analog Front -End

• Tiny 5.6mm x 2.8mm x 1.2mm 14-Pin Optically Enhanced System-in-Package

● Ultra-Low-Power Operation Increases Battery Life for Wearable Devices

• Programmable Sample Rate and LED Current for Power Savings

• Ultra-Low Shutdown Current (0.7µA, typ)

● Advanced Functionality Improves Measurement Performance

• High SNR Provides Robust Motion Artifact Resilience

• Integrated Ambient Light Cancellation

• High Sample Rate Capability

• Fast Data Output Capability

1. If the fingers are not placed properly, incorrect readings may be produced. Ambient light falling on the sensor will affect the final reading. When using the Max30100 oximeter, make sure that your fingers are not moving, as this may cause incorrect readings.

2. Do not press the sensor forcefully, as this will affect blood flow and cause incorrect readings. Place your fingers as gently as possible and make sure that they do not move, so that you can get the most accurate readings.

Interfacing Max30100 Pulse Oximeter Sensor with Arduino Circuit Diagram

First, let's start with a very basic circuit diagram. As you can see the VIN and GND pins of the Max30100 sensor are connected with the Arduino’s 3.3v and GND pins. The SCL pin is connected with the Analog pin A5, SDA pin is connected with the Analog pin A4. While the INT pin is not connected.

Interfacing Max30100 Pulse Oximeter Sensor and 16×2 LCD with Arduino Circuit Diagram

This is the modified circuit diagram. The max30100 pulse Oximeter sensor connection with the Arduino remains the same. This time I added a 16×2 LCD. As you can see, pin number 1 and pin number 16 are connected with the Arduino’s ground. Pin number 2 and pin number 15 are connected with the Arduino’s 5 volts. Pin number 3 is the contrast pin and is connected with the middle leg of the potentiometer this is used for the LCD contrast adjustment.

The RS pin of the LCD is connected with the Arduino’s pin number 9, the R/W pin is connected with the ground, Enable pin is connected with the Arduino’s pin number 8. Pins D4 to D7 of the 16X2 LCD is connected with the Arduino’s pins 7, 6, 5, and 4.

MAX30102

-Used in medical oxygen measurement devices

-Used in wearable devices

-Used in fitness assistant systems

Maxim Integrated, a subsidiary of Analog Devices, designs, manufactures and sells analog and mixed-signal integrated circuits for the automotive, industrial, communications, consumer, and computing markets. Maxim's product portfolio includes power and battery management ICs, sensors, analog ICs, interface ICs, communication solutions, digital ICs, embedded security, and microcontrollers. The company is headquartered in San Jose, California, with design centers, manufacturing facilities, and sales offices around the world.