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CC1310: Signal anti-interference and shielding problems.

Nick Sun
Intellectual 2265 points
Part Number: CC1310


Hi team,

Here's the request from customer:

They use 7mm * 7mm CC1310HSM for signal transmission, with a frequency band of 868MHz.

Currently, in PCB design, DIO8, 9, 10, and 11 are used as SPI interfaces, leading out from the TOP layer via where the chip is located to the BOTTOM layer.

At present, they plan to wrap the analog RF front-end part and CC1310 chip together in a shielding case. However, they have previously tested and found that the high order harmonics of the chip SPI signal can interfere with the analog RF signal at the receiving end.

Please provide reference shielding design suggestions to avoid such interference.

Could you help check this case? Thanks.

Best Regards,                                                        

Nick

  • 0
    TI__Mastermind 18875 points

    Hi Nick,

    A few questions:

    • It sounds like the customer is not using one of TI's CC1310 reference designs - please could you clarify?
    • What is the target output here that the customer needs to use a shield? Are they also using a FEM?
    • Can the customer clarify what they tested here; a CC1310 LaunchPad or custom hardware (and what was the test procedure)?

    If they are worried about their design, it could be best if they submit their review using Sub-1 GHz Design Review Submission: https://www.ti.com/tool/SIMPLELINK-SUB1GHZ-DESIGN-REVIEWS

    Regards,

    Zack