Current Shunt Monitor

Discussion in 'General Electronics Chat' started by R!f@@, May 13, 2014.

  1. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
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    I got some samples from TI.
    I love those guys. :p

    The attached data Name is what I got.

    I like to clear a confusion regarding gain
    It is on the first page under Choice of Gains.

    I have INA199B3 : 200V/V
    & INA211 and 212 which has 500V/V and 1000V/V

    I was wondering what exactly it means.
    AM I right to think they are
    200V/V is 200 Gain and so on.

    I was thinking of using them in my charger.

    Which will have a max of 5 Amps.
    I wanna use them to scale the Current shunt value to ADC to 5 Volts.
    Haven't figure out the shunt value yet but I got two shunts from those cheap ebay Current meters.
    I haven't yet measured the resistance of those shunt yet
     
  2. ErnieM

    AAC Fanatic!

    Apr 24, 2011
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    No your links do not work.

    Yes that is the correct gain.

    No to connecting a shunt to show 5V for 5A with a 5V reference is horrible because 100 amps reads the same as 5 amps does.

    Any resistor in series with the regulator output will effect regulation. A better place is before the regulator, even better is before the regulator and in the hot high side (not ground).
     
  3. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
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    They are not links but pdf attached to the forum

    What is correct ? about gain being 200 for 200V/V.

    The PDF shows how to connect the shunts.
     
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