2018-09-02 13:48:24 信驰达科技 7

l 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.


 
图片关键词 
 
 


l module parameters

soc

nrf52840qiaa

supply voltage

1.7v ~ 5.5v,3. 3v will be recommended

frequency

2400 mhz ~ 2483.5mhz

tx power

-20dbm ~  8dbm

sensitivity

-96 dbm

frequency error

±20 khz

flash

1mb

ram

256kb

operating temperature range

-20℃ ~ 70℃
(chip support -40℃~ 85℃,can adjust the working temperature by change the crystal)

storage temperature range

-40℃ ~ 125℃

module size

24.8*15.0*2.3mm

 

 
 

pin assignment

图片关键词 
 
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
图片关键词 
 
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.

thusbelow 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.


图片关键词 
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 modeconventional 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. highest245°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.