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TMP108: TMP108 accuracy after calibration

Doris Mutschall
Prodigy 10 points
Part Number: TMP108

Hi,

I would like to use the TMP108 for temperature sensing in an application, where I need high relative accuracy. I am doing a calibration in the beginning, so the absolute accuracy is not the point.

The absolute temperature accuracy of ±0.75°C (max) from –20°C to +85°C specified in the data sheet . The relative accuracy should be much smaller.

Could anyone provide data on the hysteresis behavior of this device or the long term stability?

Thank you

Best Regards

Doris

  • 0
    TI__Expert 5695 points
    TI support team will look into the question and contact you with an answer.
  • 0
    TI__Mastermind 43725 points
    I'm sorry, but we cannot guarantee an accuracy other than what is written in the datasheet.

    That said, our max specification covers a wide temperature range, and is guardbanded for measurement uncertainty.

    Typically, the largest errors are at the edges of a specified temperature range. This is because the error function is either parabolic or s-shaped with regards to temperature. Most of our products are trimmed to zero error (to the best of our test equipment's ability) at room temperature.

    When we set a max specification, we do so with the expectation that we will never produce a failing product. This is the purpose of guardbanding. The value listed in typical column is more representative of the performance we expect without guardbanding, but is not guaranteed.

    Finally, we guarantee that the device will meet specification for the lifetime of the product. Prior to a new product launch, we subject a sample of devices to accelerated aging. This accelerated aging can simulate 10-20 years of use depending on the temperature of the application. All devices subjected to accelerated aging must also meet the max specification.

    Ren