Does AD8056 and AD8058 OP amp internal circuit have clamping diodes ?
The AD8056 and AD8058 have one ESD diode connected to the positive supply and one to the negative supply for the ESD protection. There are no additional clamping diodes across the inputs.
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I do know that ADI amplifiers have input clamping diodes as well as ESD protection circuits built internally however, I don't know if this applies to AD8056 and AD8058 since these were released a decade ago. I had asked the product owner more details on this and still waiting for feedback. I'll get back to you.
the quickest way to answer your question would be to test it on one sample.
Use series resistors (some kOhm) for the +IN and -IN inputs, power your sample,
connect double the supply voltage to the resistors and check if the voltages on the
input pins are clamped to about the supply voltage.
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