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LPV521 CM range question

Other Parts Discussed in Thread: LPV521

Hi all,

I'm using a LPV521 nanopower opamp at Vcc=1.8V with its inputs slightly below the lower rail (about -25mV)

The datasheet specifies common mode input ranges 100mV beyond either rail for Vcc =3.3V and 5V.

For 1.8V supply voltage this 100mV allowance is not specified. Is there a reason for the difference and what will be the implication if I use it with mentioned -25mV CM input voltage?

Thank you,