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MULTI-CAL-SYSTEM pre-cal file 设置及电路问题

1  使用外部Rt温度传感器PT100,电路一端接在tempin、一端接地,这样有问题么?Enable I_temp是不是要打开?没有接在传感器电桥的R+或R-。

2  在pre-cal file中The Configure Temperature ADC utility设置时,Vexc is used for RT mode,ADC Pre Gain选最大8V/V,Dif Input 选The Tempin-GND,这样采集的温度AD特别小。问题主要在哪?

几种设置组合都试了,温度AD一直不对。

之前使用the internal temperature sensor  diode mode 补偿没有问题,但是芯片发热,补偿完的数据通电10min有漂移。

求回复