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Things they don't tell you in the Datasheets!

Discussion in 'General Electronics Discussion' started by GonzoEngineer, Dec 26, 2011.

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  1. GonzoEngineer

    GonzoEngineer

    321
    2
    Dec 2, 2011
    I had an interesting problem last week, thought I would share it.

    I have been designing circuits with Comparators for years, and never had this problem before, and I have to admit I felt pretty foolish when I discovered what was wrong.

    If you power a comparator with a single ended supply, and if either either of the inputs goes negative, you will get false triggering!

    Just sharing this for anyone who has the same problem!:D
     
  2. Resqueline

    Resqueline

    2,848
    2
    Jul 31, 2009
    Yes, exceeding the common mode ranges can make anything happen with the output.
     
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