5 Replies Latest reply on May 10, 2011 2:25 PM by user_1269049

    problem with ADC1

    user_1269049

      Hi all,

         

      I am stuck with a problem with the ADC14.

         

      When the PSOC gets warm, the reading of the ADC14 suddenly drops down a significant number and stays down until the chip has cooled down again. I have a simple PT1000 with a resistor attached to the input, nothing should happen there. The voltage should be stable at 5.00V.

         

      I could prove this several times by heating the PSOC with hot air and cooling it down again.

         

      I am talking about a start temperature of 20 degrees centigrade (normal room temperature) and a top temperature of 50 degrees centigrade (not too hot). The jump happens at around 40 degrees centigrade.

         

      Until now I can not exclude that there is another design problem on my board, but I think this may be a problem with the ADC or its settings.

         

      Could you please let me know what problem I might have run into?

         

      Best regards,

         

      Turtle