AD623AN Op-Amp to measure current

Discussion in 'General Electronics Chat' started by Jim_cliff11, May 12, 2016.

  1. Jim_cliff11

    Thread Starter Member

    Sep 5, 2015
    Hi all,

    Can anyone comment on whether an AD623 op-amp is suitable to measure a 0-3A current with an output of 0-5v?

    Last edited: May 12, 2016
  2. DickCappels


    Aug 21, 2008
    More or less, yes, it can be used for that. Don't be disappoint if it does not quite give the full 0 to 5 volt output if your power supply is 5.0V or even a little less.

    In order to use this instrumentation amp to measure current you would have to design a circuit, and the design itself is highly dependent of what you are measuring, how much the measurement circuit would be allowed to affect the circuit in which the current is being measured, and the accuracy requirements for the measurement.
  3. mcasale

    Active Member

    Jul 18, 2011
    As mentioned above, you need to be more specific as to what your needs are, like noise, offset, minimum detectable, maximum signal, etc.

    Check out this tutorial in measuring current (high- and low-side):