• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 415 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMP006 accuracy at a distance

Donald Bradley
Prodigy 10 points
Other Parts Discussed in Thread: TMP006

Assuming a restricted field of view apparatus is placed over a TMP006 creating an optical field of view of 6:1 (distance/spot size), will the TMP006 still show accurate results. If not would a Fresnel lens work ?

  • 0
    TI__Mastermind 27715 points

    Hello Donald,

    This will work, however the following considerations must be met when implementing a restricted field of view apparatus:

    1. A calibration of S0 will likely be required, since the restricted field of view means less signal will enter the TMP006 sensor. The default S0 value of 6E-14 is intended to be used with an uncovered TMP006. See the TMP006 User's Guide section 6 for more details.
    2. For best results, the apparatus should be a polished, shiny metal object with a low emissivity (such as aluminum, brass, copper, nickel, steel, etc.). This is to prevent the temperature of the apparatus from impacting the object temperature measurement, since the apparatus made of this type of material will radiate an insignificant amount of IR energy.
    3. The PCB layout should be such that the apparatus can be soldered or clipped to the GND plane, which should be electrically and thermally coupled to the GND pin of the TMP006. This is to ensure that no offsets are caused by the apparatus being at a different temperature than the GND plane/TMP006 die.

    By the way, I am in the process of writing an application report on this topic. It should be complete in the next 6-8 weeks or so.

    Best regards,

    Ian Williams
    Linear Applications Engineer
    High Performance Linear and Sensing Products