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3845 Views 3 Replies Latest reply: Apr 4, 2014 10:06 AM by davecuthbert RSS
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Apr 3, 2014 11:21 AM

UA741CP Op-Amp

Hi,

 

Can I use UA741CP operational amplifier as a comparator ?

  • davecuthbert Apprentice 87 posts since
    Feb 18, 2014
    Currently Being Moderated
    Apr 3, 2014 4:02 PM (in response to OSOO)
    UA741CP Op-Amp

    Yes you can. It won't be real fast but it will work. Make sure not to drive the inputs too close to the supply rails. The acceptable range is listed in the datasheet.

      • davecuthbert Apprentice 87 posts since
        Feb 18, 2014
        Currently Being Moderated
        Apr 4, 2014 10:06 AM (in response to OSOO)
        Re: UA741CP Op-Amp

        Looking at Linear Technology we see comparators with propagation delays as low as a few nanoseconds to those into the hundred microsecond range. And there are comparators that sip power at the microwatt level to those that consume tens of milliwatts. You can also chose the package; small surface mount, such as SO8, to leaded 8 pin DIP packages. And last but not least the supply voltage ranges from 1.2 to 40 volts.

         

        A versatile comparator available in a DIP package is the LT1017. It has a prop delay of 22us, needs only 30uA of supply current, can work with a supply from 1.2 to 40 volts. Two other important parameters are the input bias current of 15nA and an input offset voltage of 1mV.

         

        http://www.linear.com/parametric/Comparators

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