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TMP390: Technical issues

Part Number: TMP390

Tool/software:

Hi ti team,

The current problem is that the temperature fluctuates from 0 to 5 degrees, and the temperature lag function is lost. Please confirm if it is normal?

The chip was tested in a high and low temperature chamber from -5 degrees to 50 degrees. The resistance was set to low temperature 0 degrees protection, hysteresis +5 degrees recovery. I hope to see the interval of 0 to 5 degrees remain in the protection state, without any jump, and wait for the temperature to rise to 5 degrees before exiting the protection.

  • Hello,

    Could you please describe what the different curves in the provided scope shot mean, and also please provide a schematic of the TMP390 so we can verify that it is set up properly?

    Just so i understand, you are seeing one of the TMP390 outputs switch on and off during the 0C to 5C window, when it should stay low?

    Regards

    -Alex