MCP601 opamp common mode range

[treez]

Hello,

The MCP601 opamp , on page 2 of its datasheet , says its common mode input range is Vdd-1.2V.

We have Vdd = 3.3V.

So what happens if i try to use an MCP601 as a simple buffer for an input voltage >2.1V?

MCP601 datasheet
https://ww1.microchip.com/downloads/en/devicedoc/21314g.pdf

 

[FvM]

You can expect either signal clipping or some increase of buffer output voltage above the CM range. According to the datasheet, no phase reversal takes place.

 

[treez]

some increase of buffer output voltage

do you think there's a possibility of the op-amp getting "railed" and staying railed even if the input voltage falls back into the common mode range?

 

[FvM]

You mean latch-up? Not if the input current is limited to 2 mA when exceeding the supply rails, and never if it stays within the supply rails.