Max471 Module

Max471 3A Current Sensor Module

Bidirectional Measurement Phone Portable Device Battery Capacity Power Monitoring Analog Output

     It is a Max471 3A current measurement sensor module. It transmits the measurement result as an analog voltage using the resistor division principle. It measures the supply passing through the RS pins. Due to the voltage division the signals drop by a factor of 5. This increases the voltage range that can be measured. On 5V systems it can measure electrical signals up to 25V. On 3.3V systems the maximum input voltage can be 16.5V. Arduinos work with 5V and have 10 bit adcs. You get a resolution of 5V /1023= 0.00489V. You can find the real value of the signal reduced by a factor of 5 by multiplying by 5. Measurement is done with a resolution of 0.00489 x5 = 0.02445V. The current calculation is done with the voltage that forms across the 2000ohm resistor on the board.

Features:

•     Max471 sensor module
•     It can work on the high side ( High Side ).
•     Operating voltage: 3V to 25V ( 16.5V on 3.3V systems)
•     Current measurement range: DC 0 / 3A
•     High precision measurement resistor on the board.
•     Accuracy: 2%
•     It can measure in 2 directions.
•     Maximum operating current: 100uA    
•     Sleep mode current:  18uA
•     Color: Black / Blue
•     Operating temperature:   -20C  / 65C
•     4 Pin connection terminal block.
•     Dimensions:  20mm x 20mm
•     Weight:  4gr

Pin descriptions:

•     Operating Voltage: DC 5V – 25V or  DC 3V - 16.5V
•     Current measurement range : DC 0 - 3A
•     VT: Voltage measurement ratio. 1/5
•     AT: Current measurement pin
•     GND: Ground terminal
•     VOUT/VIN: VOUT=VIN

Package contents:

•       1 pcs  Max471 Voltage Current Sensor Module