The resistance strain guage application circuit diagram of ADT70ADT70 platinum RTD signal conditioner

Published:2011/8/16 2:23:00 Author:Rebekka | Keyword: resistance strain guage , application circuit , platinum RTD signal conditioner | From:SeekIC

The application circuit of the ADT70 resistance strain instrument is shown in figure. The measurement bridge is composed of the temperature compensation chipR1, measurement strain gaugeR2, wire wound resistors R3, R4, its value is1 k Ω. The bridge road working currrent is provided by IOUTA and IOUTB. Each bridge arm passing current is 1 mA. Whenit has noexternal force, the balance of the bridgeshould beset. When the specimens are caused by external deformation, the measured resistance strain gauge change makes the bridge out of balance, the diagonal outputs weak voltage signal △ u, the formula:



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