MAX471 Ampere Metering Module (0-3A)

The MAX471 module (HCSENS0041) is a complete, bidirectional, highside current-sense amplifier for portable PCs, telephones, and other systems where battery/DC power-line monitoring is critical. High-side power-line monitoring is especially useful in battery-powered systems, since it does not interfere with the ground paths of the battery chargers or monitors often found in “smart” batteries. You can also use it with like Arduino® boards and use it in power imaging projects.The MAX471 has an internal 35mΩ current-sense resistor and measures battery currents up to ±3A. The module has a built-in 2K Ohm sens resitor giving the module a full sensor range of +/- 3A. An open-collector SIGN output indicates current-flow direction, so the user can monitor whether a battery is being charged or discharged. Operation is from 3V to 36V, and draws less than 100µA over temperature. 

The module is also disassembled with 2-pin terminal and 6-pin header(soldering is required).

Technical specifications:

• Input Voltage: 3-36V
  
• Maximum Current Measurement: +/- 3A
  
• Dimensions: 20mm x 19.5mm
  
  

Pinout:

Sensor:

• RS +: Input Voltage (3-36V)
  
• RS-: Part of the load to be measured

Interface:

• RS +: An optional input voltage pin to the RS + pin in the sensor section
  
• GND: Common ground output (For both load, input voltage and other output devices)
  
• OUT: Sensor current output (1V / Ampere, 3V maximum)
  
• SIGN: Current flow direction
  
• GND: Alternative GND
  
• RS-: Alternative RS-pin

Technical Documents:

• Example project with Arduino