4 to 20 mA Current Loop Controller using DAC0832

Discussion in 'General Electronics Chat' started by otomatis, Dec 17, 2010.

  1. otomatis

    Thread Starter New Member

    Jan 4, 2010
    1
    0
    Hi all,
    Does somebody have tried to build 4-20mA converter using IC DAC0832 (datasheet on page 20)...?
    I have been build it but its not working. I was test the input data by SPST toggle switches to ground but the output always 18.9mA (single supply 12vdc 500ma) although switch has changed (0...255).
    I could not find the 92PE37B transistor in my country so i changed to 2sc4408.
    Could somebody help me, why is it not working...?

    Regards.
     
  2. happyganl

    Active Member

    Dec 17, 2009
    149
    48
    I have been built one with AD421,one point of this device need to keep its ground "float "
     
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