Resistive Detector

Last modified by Microchip on 2023/11/09 09:03

The circuit below shows a resistor (R1) that converts the sensor current (ISEN) to a voltage, as well as a difference amplifier that amplifies the voltage across the resistor while rejecting common mode noise.

circuit below shows a resistor  that converts the sensor current (ISEN) to a voltage

Advantages:

  • Good rejection of common mode noise
  • Resistive isolation from the source
  • Wide input voltage range

Disadvantages:

  • Resistive loading of the source
  • Input stage distortion

Sensor Examples:

  • High-side current sensor
  • Alternating Current (AC) line current

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