A user is asking what the recommended PCB stackup is for the CC3220MODSF?
The stackup information is present for a 4-layer board chip design in appnote swru458 (i.e., CC3220-LAUNCXL), but not for the module.
But the user is finding the calculated impedance of the antenna trace is 43 Ohm when using the module recommendations for the trace, not 50 Ohm. If he uses the trace recommendation for the chip, he gets 50 Ohm.
Recommended antenna trace for the module, from swrs206a:
Recommended antenna trace for the chip, from swru458:
Allegro layout tool:
Thank you,
David
