Isolated electric bridge measurement amplifier circuit composed of INA102

Published:2011/8/4 20:50:00 Author:Rebekka | Keyword: Isolated electric bridge , measurement amplifier | From:SeekIC

The isolated electric bridge measurement amplifier circuit is composed of ISO102 and low-noise low-power INA102, whichis widely used in industrial process control, andit is shown as above. ISO102 is the buffer capacitor coupled isolation amplifier, the gain of the INA102 is 1000,and itmain amplifies 300Ωbridge signal. Bridge power supply is composed of two parts: One part is l4mA current provided by the supply side (INA102 12 feet) passing the 680Ω resistor; Another part is 2.7mA current provided by the +5 V reference from the ISO102 incentive. The 2 parts supply 16.7mA to the electric bridge.



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