Cancel

What needs to be considered in the design of NB module PCB pads?

Last Updated on：2023-01-30 09:45:29

The user should fully consider the EMC problems caused by signal integrity and power integrity when designing the whole machine. When wiring the peripheral circuit of the module, for the wiring of power and signal lines, keep twice the line spacing width. Effectively reduce the coupling between signals, so that the signal has a relatively "clean" return path.

When designing the peripheral power supply circuit, the decoupling capacitor should be placed close to the module power supply pin, high-frequency high-speed circuits and sensitive circuits should be far away from the edge of the PCB, and the layout between them should be isolated as much as possible to reduce mutual interference and protect sensitive signals , Carry out shielding design for circuits or devices that may interfere with the operation of the module on the system board side.

We suggest that when designing the package pads on the motherboard, the 14 pads in the middle should be designed according to the size in the structure diagram, and for 52 signal pads a week, add a length of 0.3mm or more to the module. The other three sides of the pad Extend 0.05mm outward. For the main antenna, please use 50 ohm impedance line design.