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Measuring temperature with i.MX286 via PT1000

Question asked by Christian Koelling on Aug 23, 2016
Latest reply on Aug 24, 2016 by Christian Koelling

Hi!
I want to measuer the temperature with the chip mentioned above.
In the refence manual is only stated, that the sensor can be connected. My question ist: how? I tried to connect ot between ADC0 and GND with inducing a current of 100µA and 300µA, but the results is nrearly constant at 2215 digits (with 1/2 divider).
There is no other source connected. My fluke tells me there is only 50mV between these two pins...
Futhermore I have not found the corredponding maximum voltage to 4095 digits without divider.

 

I hope you can help me.
Best regards
Christian

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