2 Replies Latest reply on Sep 21, 2018 6:57 AM by scott_2272156

    How to set up ADC for measuring current across low side shunt

    scott_2272156

      I am trying to measure the current across a low side shunt as shown below.  My question is can I do this as I show in my schematic?  If I can do it what is the proper configuration of the ADC?  Do  I need to make sure I set it up a non-signed or some other configuration?

       

      I have tried it in the signed configuration and it works fine as long as i do not ground either input.  When I ground the bottom input as shown in my schematic the ADC  only reports zero basically when i run any current through shunt.  I am using a CY8CKIT-043 prototyping board mounted to a PCB I had made for a production test project I am trying to implement.

       

      Thanks