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Question asked by PDES on Mar 27, 2012
Latest reply on Mar 27, 2012 by VickyW



I have to buffering a signal, derived from an AD8226 INAMP, using an opamp like the ADA4638-1.

The INAMP is powered with +12V, while the opamp uses +3.3V because it's interfaced with an ADC that works in the range 0:3V.


in the following table are summarized the absolute maximum ratings of the ADA4638-1:


In order to protect the opamp it's enough to mantain the input current within the specified value (10mA) or I also need to protect the input against the overvoltage?

To avoid a permanently damage on the internal protection diodes it's enough limit the input current, even if the input voltage could be 12V ?


Thanks in advance