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SWRS224A – FEBRUARY 2019 – REVISED AUGUST 2019
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Applications, Implementation, and Layout
Copyright © 2019, Texas Instruments Incorporated
7.3
PCB Layout Guidelines
This section details the PCB guidelines to speed up the PCB design using the CC3235MODx . The
integrator of theCC3235MODx modules must comply with the PCB layout recommendations described in
the following subsections to minimize the risk with regulatory certifications for the FCC, IC/ISED, ETSI/CE,
and MIC. Moreover, TI recommends customers follow the guidelines described in this section to achieve
similar performance to that obtained with the TI reference design.
7.3.1
General Layout Recommendations
Ensure that the following general layout recommendations are followed:
•
Have a solid ground plane and ground vias under the module for stable system and thermal
dissipation.
•
Do not run signal traces underneath the module on a layer where the module is mounted.
7.3.2
CC3235MODx RF Layout Recommendations
The RF section of this wireless module gets top priority in terms of layout. It is very important for the RF
section to be laid out correctly to ensure optimum performance from the module. A poor layout can cause
low-output power, EVM degradation, sensitivity degradation, and mask violations.
shows the RF placement and routing of the CC3235MODx module with external antenna.