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HDC2010: Calibration and Design Guide to Get Higher Accuracy

Wayne Liu
Expert 8605 points
Part Number: HDC2010

Hi,

My customer complains that the accuracy of HDC2010 is much worse than datasheet, and the differentiation is also very big in different boards, do we have any calibration and design guide to get good accuracy? I know there are some in the datasheet but I think it is not enough. Thanks.

  • 0
    TI__Expert 5695 points
    Hi Wayne,
    I assume you are referring to RH accuracy and not temperature, right? There are various reasons for an RH accuracy exceeding the +/- 3% spec from the data sheet. Key factors are:

    1. Long exposures to UV light, visible light or high concentration chemical vapors
    2. Package materials which can produce significant out-gassing
    3. Not following the soldering guidelines in the data sheet.

    These topics are well covered in the following documents:

    Humidity Sensor: Storage and Handling Guidelines
    www.ti.com/.../snia025.pdf

    HDC2010 Datasheet (Section 8.3 Manufacturing/Handling Guidelines)
    www.ti.com/.../hdc2010.pdf

    Please be sure that your customer is quite familiar and follows all these procedures. There is no required calibration if all these guidelines are followed.

    Regards,
    Jose
  • 0 in reply to Jose Arteaga4
    TI__Expert 8605 points

    Jose

    Thank you.

    I was also asking the same question for temp sensor accuracy, appreciate if you can also give me some materials!

  • 0 in reply to Wayne Liu
    TI__Expert 5695 points
    Hi Wayne,
    The maximum accuracy of the temp sensor is specified to be +/- 0.4C. We guarantee this value with no calibration needed.
    This max value is valid in the 5C to 60C. Outside this range there is no max spec , only typical.

    Regards.
    Jose