MAX471 Voltage & Current Sensor – 3A

The Voltage and Current Sensor Module based on the MAX471 is designed for DC voltage and current measurement in embedded and Arduino-based systems. It supports current sensing up to 3A with a 1V/A output ratio and 2% typical accuracy. The onboard resistive voltage divider scales input voltage by a factor of 5, allowing safe measurement up to 25V when used with 5V ADC systems. With 10-bit ADC resolution, it enables precise monitoring of power consumption. Ideal for power analysis, battery monitoring, and load testing applications.

Features

- MAX471 High-Side Current Sensor IC

- DC Current Measurement 0–3A

- 1V/A Analog Output Ratio

- Typical Accuracy ±2%

- Voltage Divider Ratio 1:5

- Input Voltage Up To 25V (5V ADC)

- Compatible With 3.3V And 5V Systems

- 10-bit ADC Resolution Support

- High-Side Load Monitoring

- Suitable For Arduino And MCU Platforms

- Compact PCB Design

- Screw Terminal Input Connectors

Specifications

- Current Sensing IC: MAX471

- Current Measurement Range: 0–3A DC

- Current Accuracy: ±2%

- Current Output Ratio: 1V/A

- Voltage Divider Ratio: 1:5

- Input Voltage Range (5V ADC): 3–25V DC

- Input Voltage Range (3.3V ADC): 3–16.5V DC

- ADC Resolution Reference: 10-bit (0–5V)

- Minimum Detectable Input Voltage: 0.02445V

- Output Type: Analog Voltage Output

- Operating Supply Voltage: 5V DC

- Mounting Type: PCB Module

Links

- MAX471 Datasheet

- MAX471 Symbol and Footprint

Tutorials

- MAX471 Current Sensor | Cheap Electronics