RN4870 datasheet(15/48 Pages) MICROCHIP

Part #	RN4870

Description	Bluetooth 4.2 Low Energy Module

PDF	48 Pages

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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15 / 48 page

 2016 Microchip Technology Inc.

DS50002489A-page 15

RN4870/71

4.2

RN4870U Module

Figure 4-4 shows the physical dimensions of the

RN4870U module. Figure 4-5 illustrates the recom-

mended PCB layout, and Figure 4-6 shows the recom-

mended mounting details.

A low-impedance ground plane ensures the best radio

performance (best range; lowest noise). Pin 30

(BT_RF) is a 50 ohm connection that can be connected

to an external antenna such as a PCB trace antenna, a

component (chip) antenna, or through a host PCB 50

ohm micro-strip trace. This trace can be extended to

include passive parts for antenna attenuation padding,

impedance matching, or to provide test posts. It is

recommended that the micro-strip trace to be as short

as possible for minimum loss and best impedance

matching. If the micro-strip trace is longer, a 50 ohm

impedance is recommended.

FIGURE 4-4:

RN4870U MODULE DIMENSIONS

RN4870 Datasheet(PDF) 15 Page - Microchip Technology