Precision bridge isolated amplifier circuit with ISO101

Published:2011/4/18 21:39:00 Author:Jessie | Keyword: bridge isolated amplifier | From:SeekIC

As shown in figureis precision bridge isolated amplifier circuit. Bridge circuit is widely used in automatic control, test, and data acquisition system. Figure (a) is a kind of high precision and high gain bridge isolated amplifier circuit. The sensor Rin bridge can be heat-sensitive, photosensitive or thermistor, etc. The signal voltage of sampling bridgeis single polarity signal, its value is 0~-10mV. This input signal firstamplifiered byhigh precision instrument INA101, and the voltage amplifier multiples of this amplifier is 100. INA101's internal circuit diagrams are as shown in figure (b), (c).



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