Platinum thermal resistance linear temperature measurement circuit
Source: InternetPublisher:吃掉星星 Keywords: Platinum thermal resistance temperature measurement circuit BSP Updated: 2020/07/25
The platinum thermal resistance linearized temperature measurement circuit is shown in the figure. This circuit can adjust the linearity of the platinum thermal resistor
,
and also has drift adjustment and gain adjustment functions. The temperature measurement range is 0 - looqc, and the temperature accuracy is 0.025℃.
ICI and IC2 are low-drift, high common-mode rejection ratio operational amplifiers. Icl and platinum resistor RP form a temperature detection amplifier.
IC2 is an amplifier with drift (RPc), gain (RP2), and linear (RP3) adjustment. The output of Icl The signal is further
amplified, and at a temperature of O~loo'lc, a voltage of O~10V is output. The LM129 provides a reference voltage of 6.9V.
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