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Heat problem in AD811ANZ

Hello all,

    I am using AD811 in my amplifier circuit.In this circuit ,I am giving 1V sine ,triangular and square wave signal at 10Hz to2MHz  to the input of amplifier.If I  use this IC ,over a  long period of time ,it produce the heat on the surface of the IC.Eventhough I got a good  output response form this IC .If  I use this IC continuously  the heat problem completely affect the IC of  functionality and it will lead to IC dead.

Hereby, I attached the my amplifer circuit for your reference.

Please suggest the good solution for this problem.

Thanks with Regards,

Newengg

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  • Newengg,

      Yes, I think you can eliminate the LM324 buffer.  It only adds more error/noise.

    As I mentioned earlier, noise on the +15V or on the -15V will affect the voltage on

    the wiper of the pot, so it will get into your signal path.  That is why you need a

    cap on the wiper to ground.

    Harry

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  • Newengg,

      Yes, I think you can eliminate the LM324 buffer.  It only adds more error/noise.

    As I mentioned earlier, noise on the +15V or on the -15V will affect the voltage on

    the wiper of the pot, so it will get into your signal path.  That is why you need a

    cap on the wiper to ground.

    Harry

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