PRTD signal conditioning circuit composed of multi-functional sensor signal conditioner AD693

Published:2012/8/27 1:38:00 Author:Ecco | Keyword: PRTD , signal conditioning , multi-functional sensor, signal conditioner | From:SeekIC

Platinum thermal resistor is a common temperature sensor, and there is a linear relationship between RT and temperature. AD693 has the the Pt100 platinum thermal resistance interface, which can be configured directly as PRTD signal conditioner, and the circuit is shown in Fig. Pt100's resistance value is 100Ω at 0℃, and the resistance change rate TCR = 0.00385Ω / Ω / ℃. The resistor can convert the temperature in range of 0 ~ +104 ℃ into 4 ~ 20mA current to complete temperature / current (T / I) conversion. The AD693 can set 6 different temperature ranges to meet the needs of different users.



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