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CC1352P: Design for 433MHz Tx Power up to 16~17dBm

Yuanchen Zhu
Intellectual 425 points
Part Number: CC1352P
Other Parts Discussed in Thread: CC1101, CC1200

Dear TI Friend,

 We know the reference design of CC1352P 433MHz Max power is up to 13dBm or so.

 And, our company has a request to have a 433MHz design, best based on CC1352P or CC1101, to achieve a max Tx power of 16~17dBm.

  In the aspect of regulation code, we have our policy to align with SRRC in China. However, we need a proposed and reliable reference design for this right now ASAP.

  Wonder anyone shed some light on it and give us some suggestion at least? Would be very grateful. If anything is still unclear here, please don't hesitate to point out.

Thanks

Yuanchen Zhu

  • 0
    TI__Mastermind 33630 points

    Hi,

    At 433 MHz according to SRRC the maximum output power is 10 dBm (erp).

    If you need to operate at a higher output power, then 470-510 MHz can be used in China that allows 17 dBm (erp).

    Regards,

       Richard

  • 0 in reply to RGW
    Intellectual 425 points

    Hello, Richard

      We know the regulation of 10dBm(ERP) power limit for 433MHz issued by Chinese MIIT (Ministry of Industry and Information Technology), in which case one would not have to make an explicit application for this frequency range becasue of low power transmission as defined.  However, in our case, we have a good reason for Industry control application purpose in certain area and certain timeslot and will make an explicit application and negotiiation with MIIT.  Please do not worry about the regulation side, we will take care of it carefully. If you are still in worry, please PM me. 

    Right now, we need a reference design for 433MHz high power transmission. We know 470-510MHz fact, but like CC1200 and CC1101, many chips do not support 470MHz-510MHz. We heard about SKY PA to amplifer the targeted signal, if you have some suggestion and thoughts. Please do tell us.

    Best Regards,

    Yuanchen Zhu

  • 0 in reply to Yuanchen Zhu
    TI__Mastermind 33630 points

    Hi,

    The previous versions of the LAUNCHXL-CC1352P-4 was designed for 20 dBm at 433-510 MHz but this was changed since generally the 433 MHz is a low-power band. 

    Attached schematic for 20 dBm PA port for 433-510 MHz:

    Best regards,

       Richard

  • 0 in reply to RGW
    Intellectual 425 points

    Thanks for your info on the C1352P matching network reference for PA port, Richard.  One more question, if best load impedence for front end PA is 50ohm according to PA datasheet, does that mean based on other chips like CC1200 for 433MHz, we can also add PA module direct into the assumed 50 ohm point of the front end chain to start with in schematics.  Anything else you advice we need to take care of, like input power limit to PA? Would really appreciate your help.

    Yuanchen

  • +1 in reply to Yuanchen Zhu
    TI__Mastermind 33630 points

    Hi,

    Yes, all our RF designs are terminated to 50 ohm at the SMA so this makes it easier to add additional RF stages like FEM, PAs, antennas etc.

    50 ohm termination makes the RF measurements easier as well since this is the industry standard impedance for RF equipment.

    Regards,

       Richard 

  • 0 in reply to RGW
    Intellectual 425 points

    Thanks a lot, Richard.

    Yuanchen