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Saturday 29 January 2011

Interfacing Pressure Transducer Circuit

This is a design circuit of 3 kΩ pressure transducer bridge circuit that is powered from 5 V. This circuit is based on the AD620 that is especially suitable for higher resistance pressure. Here’s the figure of the circuit; 
 

In such a circuit, the bridge consumes only 1.7 mA. Adding the AD620 and a buffered voltage divider allows the signal to be conditioned for only 3.8 mA of total supply current. Small size and low cost make the AD620 especially attractive for voltage output pressure transducers.

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