CC1312R: Question with custom board with CC1190

Alejandro Diaz Olea

Part Number: CC1312R
Other Parts Discussed in Thread: CC1190, , LAUNCHXL-CC13-90

I'm designing a custom board with the CC1312R and the amplifier CC1190 based on the LaunchPad https://www.ti.com/tool/LAUNCHXL-CC13-90.

But I want the board to be a bit smaller and I noticed the Launchad had three 0ohm resistors between the SAW filter and the CC1190 RF IOs.

Are those components necessary for a good RF performance?

For what purpose are those 0ohm resistors?

Can I just remove those resistors and put the SAW filter closer to the CC1190 and just be symmetrical with the un-balance RF signal traces on the board?

Thank you in advance for your response.

over 3 years ago

0 Vegard H over 3 years ago

TI__Expert 4560 points

You should be able to remove the 0ohms. These are used if output matching of the SAW filter is needed, but for the SAW filter on the LAUNCHXL-CC13-90 and the CC1190 this is not required.

Vegard