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LMT70: spectral wavelength range

kanaya dutta
Prodigy 30 points
Part Number: LMT70

What is the spectral wavelength range of LMT70? 

Is this sensor suitable for land surface temperature monitoring from a vehicle?

  • 0
    TI__Expert 6475 points

    Kanaya,

    Please clarify your application context.  What surface temperature are you trying to measure? e.g. PCB?  We do not have data regarding spectral response of the device.  What spectral environment are you operating in?  What accuracy and footprint are you targeting?

    -Kelvin

  • 0 in reply to Kelvin Le THS
    Prodigy 30 points

    Roads and residential areas surface temperature. Is this instrument suitable? and by spectral range I meant about the wavelength range (e.g. 6-10 micrometer) which is sensed by this sensor.

  • 0 in reply to kanaya dutta
    TI__Expert 6475 points

    I will need to know about the accuracy, thermal time constant, cost etc. requirements before recommending a specific sensor suited for your application.

    If cost is not a concern I would recommend starting looking at our digital temperature sensors where the system accuracy is guaranteed.

    Our IC temperature sensor senses temperature by measuring the change in the junction Vbe as function of temperature.  This junction can be either on the same die (local) or external (remote).  Temperature change is a function of heat transfer, which can include conduction, convection, and/or radiation.  A more detailed explanation of this can be found here:

  • 0 in reply to Kelvin Le THS
    Prodigy 30 points

    Accuracy should be within 0.5 deg.C. Is there any document available which gives information about spectral wavelength ranges of your sensors?

  • 0 in reply to kanaya dutta
    TI__Expert 5695 points
    Hi Kanaya,
    All of the supported temperature sensors in TI portfolio are contact based sensors. This means that the IC needs to physically touch the temperature it needs to measure. E.g. the PCB where the Temp IC is mounted or a remote zone where an external BJT needs to be mounted). The first use case are for the ones called Local Temp Sensors, the second are for the ones called Remote Temp sensors.
    Regardless, none of those have any relationship with radiation (or wavelength).
    If you are referring to IR (infrared) based temperature sensors, these are contact-less (no need to touch the sensing zone) but TI don't support these products now.

    Hope this helps.
    Jose