RN52 datasheet(13/26 Pages) MICROCHIP

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 2015 Microchip Technology Inc.

DS70005120A-page 13

RN52

2.0

APPLICATIONS

The following sections provide information on design-

ing with the RN52 module, including restoring factory

defaults, using the LED interface, minimizing radio

interference, solder reflow profile, typical application,

etc.

2.1

Minimizing Radio Interference

When laying out the host PCB for the RN52 module,

the areas under the antenna and shielding connections

should not have surface traces, ground planes or

exposed via (see Figure 2-1). For optimal radio perfor-

mance, the RN52 module’s antenna end should

protrude at least 31 mm beyond any metal enclosure.

Figure 2-2 shows examples of good, bad, and

acceptable positioning of the RN52 on the host PCB.

FIGURE 2-1:

MINIMIZING RADIO INTERFERENCE

FIGURE 2-2:

PCB EXAMPLE LAYOUT

21.4 mm

4.6 mm

(Top View)

Dimensions are in millimeters

Keep area around antenna

(approximately 31 mm) clear

of metallic structures for

best performance

31 mm

Edge of Ground Plain

RN52

Good

Acceptable

Bad

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