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HDC1080: Inquiry Regarding Heater Lifespan and Daily Self-Test Procedure

Nandini M N
Prodigy 20 points
Part Number: HDC1080

Tool/software:

Dear sir,

I am reaching out to inquire about the expected lifespan of the heater in the  HDC1080. Specifically, I am interested in understanding whether it is feasible to run a daily self-test with the heater activated for 5 minutes each day over the course of 5 years, without causing significant aging or degradation of the part.

Could you kindly provide insights on whether this usage pattern would have any adverse effects on the heater or part?

Thanks in advance.

Warm regards,
Nandini M N

  • +1
    TI__Genius 10445 points

    Hi Nandini,

    From a heater reliability perspective, this will work just fine. I do not consider this to be a strenuous use of the heater, I anticipate no problems with the heater using it this way for many years.

    I also think this usage pattern is a good idea, and should not have adverse effects on the RH accuracy. The most delicate aspects of these RH sensors is the RH accuracy because of how the sensing polymer captures and holds moisture or chemical contaminants. Theoretically, if you over bake the part, it will dry out the polymer and it will read too negatively. However, your described heater use case does not approach this territory, and will be useful to mitigate high-humidity positive RH errors from entering into the part.

    So I think you should proceed with this plan, it should work well for you.

    Regards

    -Alex Thompson