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TMP112: About TMP112x accuracy

Noriaki Fukazawa
Expert 1620 points
Part Number: TMP112

Hello Expert.

Thank you for your special support every day.

Please tell me about TMP 112x.
There are 3 types of TMP 112A, B, N.
The TMP112x divides the model name according to the accuracy test result.

I have some questions.

- Which of the 3 products is equivalent to TMP112?

- What is the maximum temperature accuracy when TMP 112 A is used at 1.8 V?
  Temperature accuracy maximum value = ± 0.5 ° C @ 3.3 V, 0 to 65 ° C. ± (3.3 V to 1.8 V) * (± 0.25 ° C.) = ± 0.875 ° C.
  Is this a wrong recognition that this is a guaranteed value?

Best Regars.

Noriaki

  • 0
    Expert 1620 points

    There are additional questions.

    Can I think that all slave addresses of TMP112A, TMP112B, TMP112N are the same specification?

    Best Regars.

    Noriaki

  • 0
    TI__Mastermind 28070 points

    Hello Noriaki-san,

    You are correct, the TMP112x family is named according to accuracy, with TMP112A being designed for 3.3V, and TMP112B being designed for 1.8V. 

    To answer your questions:

    - Which of the 3 products is equivalent to TMP112?

    All three are part of the TMP112 family, we could refer to any of them as a TMP112.

    - What is the maximum temperature accuracy when TMP 112 A is used at 1.8 V?

    Your accuracy calculation is correct, 0.25 °C/V is a guaranteed value. So you would not expect to see greater than 0.875 °C inaccuracy if using the TMP112A at 1.8V. Of course we would recommend using the TMP112B if operation at 1.8V is needed.

    - Can I think that all slave addresses of TMP112A, TMP112B, TMP112N are the same specification?

    Yes, all three devices will have the same address selection options.

    Please let me know if you have any additional questions.

    Best Regards,
    Brandon Fisher