current sensing

Discussion in 'General Electronics Chat' started by Jaguarjoe, Feb 7, 2011.

  1. Jaguarjoe

    Thread Starter Active Member

    Apr 7, 2010
    Is there any one current sensing IC better than all the rest? My plan is to use a 0.01 ohm sense resistor and a CS IC with a gain of 100. That way 1 amp max will be 1 volt out of the chip.
  2. timrobbins

    Active Member

    Aug 29, 2009
    A cheap IA may be the best way to go. Eg. as used for microphone amps such as INA217, INA163. If you scope out the performance you need a bit more, or the circuit limitations (eg. supply rail, bipolar output, noise level, frequency response).

    Ciao, Tim
  3. Wendy


    Mar 24, 2008
    I have a project that will need a instrumentation amplifier across a low value resistor. The advantage is no reference points such as ground or Vcc need be considered.

    I know this in theory, but have yet to work out the fine points.
  4. jaclement

    Active Member

    Apr 15, 2009
    Jameco sells a hall effect device with output proportional to the magnetic field . If it sensitive enough, this could be used to sense current. this would isolate the current sense from the measuring circuit.