In-amp (?)

What are the differences with op-amp and in-amp? First time to encounter in-amp. thank you.

An instrumentation amplifier is a fixed gain differential amplifier with high impedance voltage inputs. More or less. An op amp is an infinite gain differential amplifier with high impedance voltage inputs.

...just priming the pump... :)

thank you. :)

The instumentation amp has two inputs, both with very high input impedance. U use two or three op-amps to build an instr. amp