XTR108 Three-Wire RTD Connection Circuit

Published:2011/5/19 18:07:00 Author:Robert | Keyword: Three-Wire, RTD, Connection | From:SeekIC

The XTR108 three-wire RTD connection circuit is shown in the picture shown below. It may cause errors by connecting RTD sensor lead resistance. Using the 1 and 2 connection method in the picture, the lead resistances would be the same if 1 and 2 have the same lead length to XTR108. And the caused disturbance size and direction also are the same. This disturbance is common-mode voltage. The common-mode voltage ca be limited by the XTR108's PGA. This circuit has 5 optional temperature range by choosing R21~R25 to choose 5 different minimum temperature features.



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