differential input from single ended

Discussion in 'The Projects Forum' started by ne89, Sep 25, 2006.

  1. ne89

    Thread Starter New Member

    Sep 25, 2006
    9
    0
    Hello all,

    I have a datalogger with software included,all inputs in single ended mode.I need a channel in differential input mode.
    Could you help me to build defferential input ADC from single ended input?
    Thank you.

    ne89
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Hi,

    Have you got the manual for the datalogger? If so, see if two inputs can be set up for a differential input. If the A to D in the device is single-ended only, then you're out of luck. Reengineering the internals of the datalogger is more trouble than it's worth.

    One possibility is to do the differential to single-ended conversion outside of the datalogger. Use an instrumentation amplifier to make the conversion so the datalogger sees the correct voltage.
     
  3. ne89

    Thread Starter New Member

    Sep 25, 2006
    9
    0
    Hi beenthere,

    The ADC in single ended mode only.One of the reasons I use differential input is to separate the ground input.
     
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