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IWR6843AOP: Condensation prevention for AOP devices

Tom Fisher
Expert 1440 points
Part Number: IWR6843AOP

Hi,

Our AOP based devices are going to be installed in bath rooms where condensation comes to a serious issue. The radome design considers heat dissipation as the first priority so that condensation prevention has to be done on PCB. 

The questions:

1. Is AOP applicable to condensation environments such as bath rooms?

2. What do we have to consider if paint spraying is used to protect PCB? thickness, smoothness or etc?

Cheers,

Tom

  • 0
    TI__Mastermind 25785 points

    Tom,

        Yes, Radars are deployed in Automotive environments where driver assistance is provided in rainy, foggy, snowy conditions, Same technology is used here as well. PCBs are susceptible for the moisture/condensation, hence common practice of PCB level care and precautions need to be taken such as hermetically sealing, conformal coating,  etc. without affecting the antenna regions.

    Care need to be taken, AOP antennas are not disturbed and It's field of view is not affected in this process.

    2) Coating and Painting should not be on the AOP device and closer to it's field of view, otherwise antenna performance would be degraded. Avoid any coating/painting on the AOP package surface, Typically environmental protection is provided with the help of Radome.

    Please refer section 5 https://www.ti.com/lit/an/spracg5/spracg5.pdf of the TI mmWave Radar sensor RF PCB Design, Manufacturing and Validation Guide on Radome design guideline.  

    Thanks and regards,

    CHETHAN KUMAR Y.B.

  • 0 in reply to CHETHAN KUMAR Y.B.
    Expert 1440 points

    Hi CHETHAN,

    Really appreciate your quick and thorough response.

    Cheers,

    Tom