| Instrumentation Amplifier |
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| CATEGORIES ABOUT INSTRUMENTATION AMPLIFIER | |
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An instrumentation amplifier is a type of Differential Amplifier that has been specifically designed to have characteristics suitable for use in measurement and Test Equipment . These characteristics include very low DC offset, low Drift , low Noise , very high Open-loop Gain , very high Common-mode Rejection Ratio , and very high Input Impedance s. They are used where great Accuracy and Stability of the Circuit both short- and long-term are required. The 3 Opamp version of the instrumentation amplifier is shown here. The gain for this circuit is calculated as follows: : There are also integrated devices available such as the AD620 (approx $12) or AD624 (approx $35) from Analog Devices SEE ALSO EXTERNAL LINKS
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