CC1311R3: CC1311 evaluation in 434MHz variant

Hi Tobias,

The 433 MHz path on the LAUNCHXL-CC1352P-4 has comparable performance to the LAUNCHXL-CC1312R if a 433 MHz BOM was mounted.

However, if you wish to directly evaluate the CC1311R3 RGZ package then mounting a CC1311R3 onto either a LAUNCHXL-CC1312R or LP-CC1312R7 would be the best option.

There are some important comments on this:

• The LAUNCHXL-CC1312R and LAUNCHXL-CC1352P-4 use 0402 components.
• The LP-CC1312R7 and LP-CC1352P7-4 use 0201 components.
• You do not need the components after the RF switch on the LAUNCHXL-CC1352P-4 if you are not using it, only this part of the RF path:
• The LAUNCHXL-CC1312R has enough pads for the same BOM.
• The LP-CC1312R7 does not, so you would need to manually modify the board. The thread you linked to in the "Original Question" section was for a customer designing their own board (and what they should base the design on) rather than a recommendation for modifying a LaunchPad for evaluation.
• The easiest option for evaluation of an 0201 BOM would be the LP-CC1352P7-4 (but wouldn't be directly testing the CC1311R3). You could mount a CC1311P3 if you wanted to test a CC1311x3 device; the radio for the +14 dBm, Sub-1 GHz output is the same on the R3/P3 variants so will have the same performance.

Are you aiming to use 0201 components for this design?

Regards,

Zack

Hi Zack,

thank you! Your last bullet point sounds interesting for me. If I understand correctly, the LP-CC1352P7-4 is already available in a 434 MHz variant. So the only thing would be to change the chip from CC1352 to CC1311 and thats all?

Is there a difference between the 0201 and 0402 boards because you ask?

As in the other ticket. I want to evaluate the CC1311 for single ended and differential ended also in the 434 variant. I would prefer the easiest way to do so, with less modifications on any board.

Best regards

Tobias

The other difference on the LP-CC1352P7-4 is the inclusion of an RF Switch (as there are 3 RF paths on the CC1352x devices). As the RF Switch requires a 50 Ohm input on each port, we recommend the same BOM for designs with/without the switch - you can see this when comparing the LP-CC1352P7-1 and LP-CC1312R7 designs. 

So, yes; swapping the CC1352P7 for a CC1311P3 device will allow you to evaluate the differential 434 MHz design's performance using a CC1311x device and the results should be comparable to a 434 MHz CC1311x design without the switch.

Are you okay with swapping over the devices on the LaunchPads (I am only asking because of the other thread)?

We have optimised the designs to have essentially the same performance for designs that use either 0402/0201 component sizes, but there are some advantages to using 0201 components. Please see the following thread for a summary: https://e2e.ti.com/support/wireless-connectivity/zigbee-thread-group/zigbee-and-thread/f/zigbee-thread-forum/735969/cc1352p-using-0402-size-components-for-rf-circuitry  

Regards,

Zack  

Hi Zack,

it would be a big help for us if you could do the swap.

Would it be possible to have a single ended version for 434 too, like you said for the 868? If yes, it would be great to have them too.

Best regards

Tobias