Noise in Instrumentation Amps

Abstract

The difference between the op-amp and the instrumentation amps (in-amps) is the fact that, usually, the input of an op-amp is configured for single ended (non-symmetrical, un-balanced) purposes and the in-amp is configured as an amp with a true differential (symmetrical, balanced) input. However, both types of amps can be configured the opposite way – but coming along with certain disadvantages. In addition, in most IC cases, the in-amp’s gain can be set by only one resistor whereas the op-amp’s gain can be set by a range of different possibilities.