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Purpose of capacitor in the ICL7107 voltmeter circuit

  1. Jul 6, 2012 #1
    Hi,

    I was wondering what is the purpose of connecting 0.01 micro farad capacitor across pin 30 and pin 31 of the circuits http://www.electro-tech-online.com/custompdfs/2012/07/fn3082.pdf(page 11 to page 12 every typical circuit does connecting it) ?
    I have tried to read through the datasheet but couldn't find the answer, guess you might know the answer. Thanks in advance.

    William
     
  2. jcsd
  3. Jul 6, 2012 #2

    berkeman

    User Avatar

    Staff: Mentor

    Looks to be a lowpass filter on the differential input voltage. Can you tell us what the cutoff frequency is and what order the filter is?
     
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