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An instrumentation amplifier (sometimes shorthanded as in-amp or InAmp) is a type of differential amplifier that has been outfitted with input buffer amplifiers, which eliminate the need for input impedance matching and thus make the amplifier particularly suitable for use in measurement and test equipment.
Instrumentation is a collective term for measuring instruments, used for indicating, measuring, and recording physical quantities.It is also a field of study about the art and science about making measurement instruments, involving the related areas of metrology, automation, and control theory.
A commonly used amplifier is the instrumentation amplifier. Instrumentation amplifiers such as the integrated circuit (IC) AD620 amplifier are able to amplify the difference between two different voltage inputs while maintaining little offset voltage and a high CMRR , allowing it to amplify low frequency signals while rejecting noise.
A Bioamplifier is an electrophysiological device, a variation of the instrumentation amplifier, used to gather and increase the signal integrity of physiologic electrical activity for output to various sources. It may be an independent unit, or integrated into the electrodes.
The "instrumentation amplifier", which is also shown on this page, is a modification of the differential amplifier that also provides high input impedance. The circuit shown computes the difference of two voltages, multiplied by some gain factor.
ADI's companion amplifier ICs provide accurate, high-speed and precise signals for driving data converters and are key for applications such as digital audio, current sensing, and precision instrumentation. [50] The company's data converter chips are used by National Instruments in high-precision measurement instrumentation systems. [51]
Instrumentation engineering is the science of the measurement and control of process variables within a production or manufacturing area. [1] Meanwhile, control engineering, also called control systems engineering, is the engineering discipline that applies control theory to design systems with desired behaviors.
Amplifiers with an isolation barrier allow the front-end of the amplifier to float with respect to common mode voltage to the limit of the barrier's breakdown voltage, which is often 1,000 volts or more. This action protects the amplifier and the instrument connected to it, while still allowing a reasonably accurate measurement.