CC1352R: What is the maximum safe RF power this device can see coming back thru output pins 1-4 when receiving power through antenna and it's not transmitting power?

Lauren Mayfield

Part Number: CC1352R

What is the maximum safe RF power the CC1352R can see coming back through its output pins 1,2,3, and 4 (RF_N, RF_P, RF_P_SUB..,…) in the scenario where we are receiving power through our antenna and the CC1352 is NOT transmitting power through these ports?

Thanks,

Lauren

over 5 years ago

0 Keith Barkley over 5 years ago

Guru 39960 points

0 Lauren Mayfield over 5 years ago in reply to Keith Barkley

TI__Expert 7290 points

This table only covers the VDDS pins and Vin pins. I need to know about the output, as well as what applies in this scenario: where we are receiving power through our antenna and the CC1352 is NOT transmitting power through these ports?

We are also using a Johansson balun: https://www.digikey.com/product-detail/en/johanson-technology-inc/0900PC15A0036E/712-1760-1-ND/9863734 on those pins so that should be taken into account since it should provide some additional protection.

0 Keith Barkley over 5 years ago in reply to Lauren Mayfield

Guru 39960 points

It says "RF Pins" - it does not specify input or output.

0 Lauren Mayfield over 5 years ago in reply to Keith Barkley

TI__Expert 7290 points

Ok, so I can assume these ratings apply to both input and output.

How much power is allowed after taking into account the Johansson balun since it provides extra protection?

0 Keith Barkley over 5 years ago in reply to Lauren Mayfield

Guru 39960 points

That is the power *at the pins* you need to account for any loss - especially since it may be out of band.

0 Simon J over 5 years ago

TI__Genius 11810 points

Hi,

As Keith has pointed out; the maximum input power on the Sub-1 GHz pins is 10 dBm and 5 dBm on the 2.4 GHz pins. This is when the radio is not transmitting. You need to calculate the loss in you BALUN, filters and antenna to be able to estimate the maximum power you an apply to the antenna.

-Simon

0 Keith Barkley over 5 years ago in reply to Simon J

Guru 39960 points

I know some military radios that use 20 W RF power MOSFETS in the RX front end since they live on a ships antenna mast and can get painted by the radar!

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CC1352R: What is the maximum safe RF power this device can see coming back thru output pins 1-4 when receiving power through antenna and it's not transmitting power?