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,
The Lm324 is not needed unless you are trying to set the output offset voltage to a particular value. If you are concerned about eliminating output offset consider using a composite amplifier (with the AD811 inside the feedback loop of the 1st amplifier) configuration with the 1st amplifier having extremely low offset voltage which will maintain the overall offset at the 1st amplifier specification. The overall gain will be the sum of amp1 gain and AD811 gain.
Also the AD811 is recommended to be used with a heat sink at +/- 15v supply voltages.
The optimal feedback resistor for the AD811 is 909 to 1000 ohms. Higher values will roll off the high end response.