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CC1110-CC1111: Advanced Output Power Programming

Braeden Muller
Prodigy 10 points
Part Number: CC1110-CC1111


I am using the CC1111Fx for academic research and am trying to increase the output power beyond 10dBm without using any external hardware. To get specific measurements, I am deliberately trying to induce distortion of the output signal by saturating the power amplifier.

Referring to datasheet sections 13.15 and Table 72: In the 433 MHz band, I see a positive correlation between PA_TABLE settings and output power. However, the corresponding entry for 10 dBm is 0xC0 while for 7 dBm it is 0xC8. Because of this, I am unsure exactly what the relationship is.

What will a setting like 0xFF or 0xF0 do?

  • 0
    TI__Mastermind 33330 points

    Please refer to app note: https://www.ti.com/lit/swra151

    This is also valid for the CC1111Fx

  • 0 in reply to RGW
    Prodigy 10 points

    I was specifically trying to find a register setting to reach the P_1dB compression point, but reading the linked document and datasheet for that transceiver, I am unable to find any mention of that. Is it safe to assume that there is no way to achieve this with PATABLE settings?

  • 0 in reply to Braeden Muller
    TI__Mastermind 18435 points

    Hi,

    The only other register that I can find that could potentially affect this is the LODIV_BUF_CURRENT_TX[1:0] in the configuration register 0xDF1B: FREND0 - Front End TX Configuration (p225 of the datasheet). However, it looks to be limited in what effect this will have but is still worth experimenting with.

    So, achieving this using only register settings is not possible if that does not have any impact.

    Otherwise, you would have to see if, by tuning the external RF matching components, you can find a better match for TX output power (at the expense of current consumption) if you are able to manually rework the EVM you are using.


    Regards,

    Zack