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Fast response temperature sensor

David Woo
Prodigy 530 points
Other Parts Discussed in Thread: TMP102, TMP112, TMP103, TMP108, LMT70

Our customer need a temperature sensor with fast response. Any suggestion?

  • 0
    TI__Mastermind 34260 points

    Hi David,

     

    In general, the speed at which variations in external temperature are transferred to the internal sensing elements determines the overall response time. The thermal path in turn is determined by a number of factors with package size/material, PCB size and layout among them.

     

    Smaller packages tend to reach thermal equilibrium faster. In this regard please check out TMP102/TMP112, the temperature step responses are shown in the application curves section (figure16 for TMP102 and figure21 for TMP112).

     

    If it is an option to use WCSP package, please consider TMP103/4 and TMP108. We are in the process of updating the data sheets for these devices, and will have data related to temperature step response published shortly, but I expect it to be much faster.

     

    Regard, Guang

    Apps-Sensing Products

  • 0
    TI__Expert 7220 points
    Hi David,

    The LMT70 has a fast response time of 1.5 seconds in stirred oil due to its small 0.88 x 0.88mm chip scale packaging. The part is also our most accurate analog temperature sensor with 0.05C (typ) 0.13C (max) accuracy from 20C to 42C.

    -Michael Wong