Looking for opamps with ability to tolerate input voltage above V+ ?

(setting a Fup2 s.e.c)

Christopher Ott schrieb:

If the high input voltages are only due to miswires, you might as well add protection circuitry to a more common, standard OP.

When looking for OPs that accept voltages significantly above V+, they all are rather esoteric, expensive and/or hard to get. The good ol' TL072, however, at least accepts input voltages /up to/ V+, which might be sufficient in some cases.

Zener diodes??

Add a clamping diode from the input to the positive supply rail of the op amp, and add a small resistor on the input signal to keep it from frying the diode (assuming there isn't already one there for the circuitry)

That sort of problem could be designed out.

the way I'm reading that, they just need to survive, they don't need to function correctly in those conditions - right???

two:

build your own op-amps from discrete transistors. pass labs have an article on their web site.

use series resistors (eg 1K) and shunt diodes to VCC or to a 3.9V zener,

and might eliminate need for a fancy ESD protection device as well.