New developed Nordic nRF52840 BLE 5.0 module Sep 02, 2018
Overview

These Bluetooth modules are BLE RF modules. With advantages of low power consumption, compact design, long transmission distance and strong anti-interference capability, the modules embedded with high performance IFA, can be widely used in low power local area network communication.

RF-BM-ND05 built upon chip Nordic52840. The module can be used to develop consumer electronic products and phone peripherals over BLE 5.0. It provide a  quick BLE solution for the communication between customer’s products to mobile devices.

APPLICATION


Module Parameters

Pin assignment

Figure 1 Pin assignment


Pin

Name

Definition

Remarks

Pin1

GND

Ground

Ground

Pin2

VCC

Positive Input

Power Supply: 3.3V

Pin3

P21

I/O

Pin4

P22

I/O

Pin5

P23

I/O

Pin6

P24

I/O

Pin7

P25

I/O

Pin8

P28

I/O

Pin9

P29

I/O

Pin10

P30

I/O

Pin11

P26

I/O

Pin12

P27

I/O

Pin13

P02

I/O

Pin14

P03

I/O

Pin15

P04

I/O

Pin16

P05

I/O

Pin17

P06

I/O

Pin18

P07

I/O

Pin19

P08

I/O

Pin20

P09

I/O

Pin21

P10

I/O

Pin22

P11

I/O

Pin23

P12

I/O

Pin24

P13

I/O

Pin25

P14

I/O

Pin26

P15

I/O

Pin27

P16

I/O

Pin28

SWDIO

Pin29

SWCLK

Pin30

P17

I/O

Pin31

P18

I/O

Pin32

P19

I/O

Pin33

P20

I/O


Package Size

Thickness of the module is 2.3 ± 0.1 mm

Figure 2 Package Size


Layout Proposals

The serpentine antenna on PCB is free space electromagnetic radiation. The place and layout range are keys to enhance the data rate and transmit range.

Thus,Below are the layout proposals for antenna and route:

1. Place the antenna on the edge(corner) of the PCB backplane.

2. Make sure there is no signal or copper foil in each layer.

3. Hollowing out the yellow pane part (figure 3) to make less S11 interference.


Figure 3


Recommended Operating Conditions
Notes:

(1) The operating temperature is limited to the change of crystal’s frequency.

(2) To ensure the RF performance, the ripple wave of the source must be less than 300mV.


Identification

Test Condition

Min

Typ

Max

Unit

Source & IO

Battery mode

1.6

3.3

5.5

V

Operating Temperature

/

-20

25

70

Environmental Hot Pendulum

-20

20

℃/Min


Reflow Conditions
1. Heating mode:conventional convection or IR convection;

2. Times allowed to reflow: 2 times, for the below reflow (conditions)(figure 4);

3. Temperature curve: the reflow should be in accordance with the temperature curve shown below (figure 4);

4. Highest:245°C。
Figure 4 Parts’ heat-resistance temperature curve for welding(welding point)

Electrostatic Discharge

Module will be damaged for the discharge of static, RF star suggest that all modules should follow the 3 precautions below.:

1. According to the anti-static measures, bare hands are not allowed to touch modules.

2. Modules must be placed in anti- static areas.

3. Take the anti-static circuitry(when inputting HV or VHF) into consideration in product design. Static may result in the degradation in performance of module, even causing the failure.

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