CC1352P: Frequency offset issue

EvanWuCN

Part Number: CC1352P

Hi,

I am designing a module with CC1352P (with the new silicon version of E (2.1)), but when I am testing the frequency offset using Smart RF Studio 7, I found it offsets over 500KHz from center frequency 2440MHz, which is obviously not acceptable. Here I attached the configurations and the spectrum data.

However, when I replaced the chip with previous silicon version of C (1.1), of which the result is totally fine. And this is the same board.

This experiment is also performed on TI's CC1352P-2 LauchPad, and the result is the same.

Please help to advise me what went wrong?

Thanks,

Evan

over 6 years ago

0 TER over 6 years ago

TI__Guru**** 317180 points

Do you use external load caps for the 48 MHz xtal on your board? SmartRF Studio assumes this for CC1352P and sets the internal cap array to minimum.

0 EvanWuCN over 6 years ago in reply to TER

Intellectual 325 points

Hi TER,

Thank you so much for your reply.

We do not use external caps. We tried and found that SmartRF Studio did set the internal cap array to minimum for CC1352P, so that's why it offsets so much.

Regards,

Evan

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CC1352P: Frequency offset issue