SWRS037B – JANUARY 2006 – REVISED MARCH 2015
Each decoupling capacitor ground pad should be connected to the ground plane by separate vias. Direct
connections between neighboring power pins will increase noise coupling and should be avoided unless
absolutely necessary. Routing in the ground plane underneath and between the chip, the balun/RF
matching circuit and the decoupling capacitor’s ground vias should also be avoided. This improves the
grounding and ensures the shortest possible return path for stray currents.
The external components should ideally be as small as possible (0402 is recommended) and surface
mount devices are highly recommended. Please note that components smaller than those specified may
have differing characteristics.
Precaution should be used when placing the microcontroller in order to avoid noise interfering with the RF
circuitry.
It is strongly advised that the CC1150EM reference design (see
and
) layout is followed very closely
in order to get the best performance. Gerber files and schematics for the reference designs are available
for download from the TI website.
Circles are Vias
Figure 6-4. Left: Top Solder Resist Mask (Negative) and Right: Top Paste Mask
56
Applications, Implementation, and Layout
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