6 Replies Latest reply on Jun 4, 2016 2:42 AM by user_418291904

    Opamp: 5A DC current sampling  with 0.01ohm resistor

    龙勃.韩

      Hello everyone,

         

      I'm trying to examine the DC current(range form -5A to 5A) on a user-circuit Vss wire using SARADC and Opamp components of "CY8C4247 /PSoC 4", the attachment is the demo circuit.
      R0 equals 0.01ohm.

         

      Since the difference voltage between Vi+&Vi- is small(50mv under 5A condition), with Opamps to amplify the voltage difference of ADC differential input ADC_in+&ADC_in- by 19.18times(gain=19.18). I wonder if this application would work properly?

         

      signals Vin+&Vin- equals SARADC channel1 input+&input- in schematic demo2.

         

      thx a lot