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the package choose of AD811

sir:

   I design my system with the AD811, which I supply power with +/-18V. Unfortunately, I choose the package of 8 Lead SOIC, which is the AD811JR series. But I did not notice the note in the datasheet which said: The AD811JR is specified with ±5 V power supplies only, with operation up to ±12 V.

I want to know that is there a 8 lead SOIC AD811 that can withstand a supply greater than +/-12V?  Or, if I want to provide the supply of +/-18v, I must choose other package of AD811?

best wishes

Thank you!

Jacky

  • Jacky,

      You are running into the laws of physics.  If you really need to go fast, then 16 mA times 36V = 0.576 Wt

    times 155 degC/wt means the junction temperature is very high and the system is unreliable.  You didn't

    say what gain, what load, and your highest frequency signal.  Also, we do all the measurments at +/-15V

    and have +/-18V as ABSOLUTE MAXIMUM.  The part is not designed to operate at +/-18V, we give

    you a safety factor when you operate at +/-15V.

    What do you really want to do?

    Harry

  • Harry:

         Thank you for your precious advice. Now, I adjust my supply to +/-12V, and I plan to use ad811a or ad811s series in the next version of design.

         But after I adjust my supply to +/-12V, one of the four AD811JR I used break down when I was doing the test. But even the AD811JR burn out, the device can still work. Can the device just burn out the package, and the die is OK? What is the possible reason that the AD811JR burn out when I provide the supply of +/-12V.

    Thank you

    best wishes!

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