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Custom CC2650 PCB Bluetooth connection issues

Kevin Parkes
Prodigy 60 points
Other Parts Discussed in Thread: CC2650

Gerbers Mislate Hub P1 25thMay17.zipHi,

We have designed two PCB's for a CC2650 hub and client. We find that the client PCB gives us a similar range to the SmartRF06 dev board, but the hub PCB has a much shorter range of just a few metres before the Bluetooth connection drops.

I have attached a schematic and gerbers if you could possibly offer any insight into whether our PCB layout has some issues. The hub and client are both 5x5 with internal bias so we can't think of any other software reasons why they should perform any differently.

Thanks,

Kevin.

MiSlate Hub schematic 25thMay17.pdf

  • 0
    TI__Guru** 106705 points
    Hi Kevin,

    Have you done any measurement to check you radiated performance and/or antenna impedance match?

    How are you measuring the range and what HW are your boards communicating with during the test?

    You should ideally have more ground vias around the DCDC regulator, maybe you can try to disable the regulator and see if that helps?

    The 24 MHz should not have external load capacitors.

    Cheers,
    Fredrik