• Resolved

How to calibrate the TMP102

Hello

Datasheet of TMP102 shows typical error 0.5C (max 2.0C) between range -25~+85C. Is it possible to get +/-0.2 error between range +25~+45C range through calibration? Any advice is appreciated. TMP112 has better performance, but it is more expensive.

Best Regards

Alex

  • Hi Alex,

    I will get back to you on this topic tomorrow.

    Mayrim

    Mayrim Verdejo

    TI Current Shunt Monitors Applications Support

  • In reply to Mayrim Verdejo:

    Hi Alex, 

    +/- 0.5°C is the best accuracy you can obtain with TMP102.  Calibration is possible on TMP112 not TMP102.  TMP112 comes precalibrated for 0.5C accuracy and can be calibrated to get less than 0.2C.

    Can you please share more information about your application? 

    Mayrim 

     

    Mayrim Verdejo

    TI Current Shunt Monitors Applications Support

  • In reply to Mayrim Verdejo:

    Hi Mayrim

    Thanks. Could you please introduce why TMP102 can't be calibrated? We can talk through mail if necessary.

    The application is to measure the body surface temperature. A metal path will transfer the thermal charactor from body surface to sensor GND plane.

    Regards

    Alex

  • In reply to alex xu2:

    Hi Alex,

    Please share your email or email me mayrim.verdejo@ti.com

    Thanks,

    Mayrim

    Mayrim Verdejo

    TI Current Shunt Monitors Applications Support

  • In reply to Mayrim Verdejo:

    Hi Mayrim,

    We are facing the same problem as mentioned above.Can i know the reason why we can't calibrate using TMP102. Here we want an accuracy of +-0.5°C. But as per your data we are getting 2°C deviation.  Here our area of interest is in between 0°C  to 10°C. If you want you can even mail me on jayesh1.embedded@gmail.com

    Best Regards

  • In reply to Jayesh Patel:

    Jayesh,

     

    First of all I would like to bring to your attention our next generation temperature sensors that have higher accuracy spec: TMP112 as you may already be aware of, and TMP107 which is going to be available by the end of this month. Both devices boast a guaranteed MAX temperature error spec of 0.5C. You are certainly welcome to consider these devices for your application. As a matter of fact I think you can easily swap TMP112 for TMP102 in your system without HW and SW retooling.

     

    In my opinion, any temperature sensor can be calibrated; it all depends on target accuracy and how much effort is budgeted for the calibration process itself. Another aspect to consider is whether each system will be calibrated individually or the calibration is done on a sampled basis. You can always create a look-up table to account for the offsets.

     

    Regard, Guang

    Apps-Sensing Products

  • In reply to Jayesh Patel:

    Hi Jayesh,

    As Guang mentioned on previous reply any temperature sensor can be calibrated. The reason I mentioned (I should have been more clear) of calibrating TMP112 and not TMP102 is because in TMP112 dataheet we are providing the look-up table to account for the offsets as you can see in Page 22. This information is not provided for TMP102 (not available either) so the look-u table need to be created by the customer.

    Hope this helps!

    Mayrim Verdejo

    TI Current Shunt Monitors Applications Support

  • In reply to Mayrim Verdejo:

    HI Mayrim,

    I'm Tina from Shanghai Cydiance Technology company, mainly provide and export temperature data loggers to overseas countries, like USA and Mexico. We've purchased around 100,000pcs tmp102 digital temperature sensors from the agent, and our customers are requesting for NIST-traceable calibration certificate, I couldn't find it on your website, could you please help me on this issue?

    Best regards
    Tina Sun
    Cydiance Technology
  • In reply to Tina Sun:

    Hi Tina,

    I have a document which may suit your needs. Please contact me 

    Thanks,
    Ren

  • In reply to Ren Schackmann:

    Hi Ren,

    Thank  you for your reply and help, could you please share the document with me by email (tina@cydiance.com)? 

    Best regards

    Tina Sun

    Marketing & Sales

    Mob/Whatsapp - +86 15000 56 4488

    Skype - tina.sun.reme

    Shanghai Cydiance Technology Co., Ltd.