Hall effect sensor

Discussion in 'General Electronics Chat' started by Dritech, Mar 18, 2014.

  1. Dritech

    Thread Starter Well-Known Member

    Sep 21, 2011
    756
    5
    Hi all,

    I bought the ACS758xCB which is listed as Unidirectional Current Directionality. In the datasheet, the two power side pins (Primary circuit) are labeled with a plus and minus symbols. Does that indicate something? Since these sensors are connected in series with the Vcc line, what difference does polarity really make?

    Thanks in advance.

    Datasheet: http://www.idl.ku.edu/ARA/AARPS/Documents/Sensors/Current/Allegro_0758-Current-sensor.pdf
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,524
    2,369
    The input is bi directional AC or DC, presumably the polarity is for when sensing DC only for the unidirectional versions only.
    Max.
     
  3. Dritech

    Thread Starter Well-Known Member

    Sep 21, 2011
    756
    5
    So basically I connect the + to the power supply positive terminal and the - to the load, right?
    Also, what is the best op-amp to use for amplifying the 60mV/A please?
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,524
    2,369
    If you are talking the primary, it goes in series with the load, for DC that would be the correct connection, what do you intend to do with the signal?
    Anything from a 741 etc.
    Max.
     
Loading...