Instrumentation Amplifier Circuit with Program Controlled Integrated Operational Amplification

Published:2011/7/18 7:10:00 Author:Sue | Keyword: Instrumentation Amplifier, Program Controlled, Integrated, Operational Amplification | From:SeekIC

The circuit uses program controlled operational amplifier F4250 as amplifier, which has a low static power. The power voltage is ±1.5V, which can use two dry batteries. The main features of the circuit: Every input terminal's input resistance value over the ground is 100MΩ. Input bias current is 0.2nA. Working current is 2.8μA. Power consumption is 8.4μW. The circuit voltage gain is 100. The circuit alternating current common-mode rejection ratio can be changed by adjusting RW1. When the load is 100kΩ, output peak value is 1.8V and input terminal's equivalent noise voltage is 8μV.



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