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CC1352P: 14dBm output

Arthur Thompson27
Expert 1800 points
Part Number: CC1352P

Hello,

Our primary market for the CC1352P product will use a 915MHz +20dBm output.  However, for some secondary markets we need to reduce the power to +14dBm.

Is it better to output the +14dBm from the "PA" output set to a reduced power level?  Or is it better to output the +14dBm from the "Sub-1GHz" output, at its full output power?

Thanks,

Arthur

  • 0
    TI__Guru**** 317180 points

    +14 dBm from the HPA that is capable of + 20 dBm will give higher output power variation than using the "Sub-1GHz" at max power. If I understand your question correctly you are not going to use + 20 dBm and +14 dBm in the same product. The reason I ask is that using +14 dBm at the "Sub-1GHz" output require setting VDDR to max but using +20 dBm uses the nominal VDDR and setting VDDR is only possible at bootup. 

    If possible I would use +14 dBm from the "Sub-1GHz"  output. 

  • 0 in reply to TER
    Expert 1800 points

    Hi TER,

    Yes, we would either choose +14dBm or +20dBm based on what country the device is in.  So it won't switch back and forth at runtime.

    Is it possible to configure VDDR as you suggest with SmartRF studio?  Do we just uncheck "disable high output power PA" to achieve the correct settings?  Eventually we will want to set this in device firmware, but for now we would just like to perform a conducted test to measure the characteristics of the +14dBm output.

    Thanks,

    Arthur

  • 0 in reply to Arthur Thompson27
    TI__Guru**** 317180 points

    In SmartRF Studio this is set indirectly  meaning that if you select +14 dBm the correct VDDR is set accordingly, the same with 20 dBm. Meaning that for SmartRF Studio testing you don't have to think about it.