MAX861IUA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Biopotential and Optical Sensor Module
• Characteristics: High-performance, low-power, small form factor
• Package: 8-pin µMAX® package
• Essence: A versatile sensor module for measuring biopotential signals and optical heart rate monitoring
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage: 1.7V to 3.3V
• Operating Temperature Range: -40°C to +85°C
• Biopotential Signal Bandwidth: DC to 128Hz
• Optical Heart Rate Monitoring Bandwidth: DC to 4kHz
• Integrated LED Driver Current: Up to 50mA
• Photodetector Input Current: ±200µA
• Low Power Consumption: < 1.5mW

Pin Configuration

The MAX861IUA features the following pin configuration:

┌───┬───┐ │ 1 │ 2 │ ───┼───┼───┤ │ 3 │ 4 │ ───┼───┼───┤ │ 5 │ 6 │ ───┼───┼───┤ │ 7 │ 8 │ └───┴───┘

1. VDD: Supply Voltage
2. GND: Ground
3. SDA: Serial Data Line
4. SCL: Serial Clock Line
5. INT: Interrupt Output
6. RST: Reset Input
7. NC: No Connection
8. NC: No Connection

Functional Features

• Simultaneous measurement of biopotential signals and optical heart rate
• Integrated LED driver for photoplethysmography (PPG) measurements
• High signal-to-noise ratio (SNR) for accurate measurements
• Low power consumption for extended battery life
• Flexible configuration options for different applications

Advantages and Disadvantages

Advantages

• Compact size enables integration into small form factor devices
• Wide operating voltage range allows compatibility with various power sources
• High-performance sensor module ensures accurate and reliable measurements
• Versatile functionality supports a wide range of applications

Disadvantages

• Limited biopotential signal bandwidth may not be suitable for certain applications requiring higher frequencies
• Requires external components for complete system implementation

Working Principles

The MAX861IUA utilizes advanced sensing technology to measure both biopotential signals and optical heart rate. It incorporates an integrated LED driver and photodetector for PPG measurements. The module operates by illuminating the skin with light from the LED and detecting the reflected light using the photodetector. This allows the measurement of blood volume changes, enabling heart rate monitoring and other physiological measurements.

Application Field Plans

The MAX861IUA finds applications in various fields, including:

1. Fitness and wellness devices
2. Wearable health monitors
3. Remote patient monitoring systems
4. Sports performance trackers
5. Stress and fatigue monitoring devices
6. Sleep quality analysis tools

Alternative Models

For alternative options, consider the following models:

1. MAX30102: Similar functionality with a different pin configuration
2. MAX30205: Temperature sensor module with additional features
3. AD8232: Dedicated biopotential signal measurement IC

These alternatives offer similar capabilities and can be considered based on specific application requirements.

In conclusion, the MAX861IUA is a versatile sensor module that combines biopotential and optical heart rate monitoring capabilities. With its compact size, low power consumption, and high-performance features, it is suitable for a wide range of applications in the healthcare and wellness industry.