参数资料
型号: PIXLITE-SO-PLFE
厂商: Flexipanel
文件页数: 8/13页
文件大小: 0K
描述: MODULE ZIGBEE SW FAST 24-SMD
标准包装: 1
系列: Pixie™
频率: 2.4GHz
调制或协议: 802.15.4 Zigbee
功率 - 输出: 0dBm
电源电压: 2.1 V ~ 3.6 V
电流 - 接收: 25mA
电流 - 传输: 25mA
数据接口: PCB,表面贴装
存储容量: 32kB ROM,1536B RAM
天线连接器: PCB,表面贴装
工作温度: -40°C ~ 85°C
封装/外壳: 26-SMD
包装: 管件
其它名称: 658-1008-5
PIXIE-LITE-SO-PLFE
A high location is recommended, particularly for
avoiding interference from transient objects such as
passers-by and their cellphones. Microwave ovens are
particularly problematic for the short periods in which
they and operational. Where possible, orient all the
antennas in the same direction so that their
polarizations are the same. In a mesh network, a highly
attenuating medium such as a floor may be bridged by
placing two routers close to each other, one on either
side of the barrier.
Table 2. Attenuation of typical bulk materials
Material
Reinforced concrete floor
Brick wall with window
Office wall
Metal cabinet
5mm potting compound
Vegetation
Reduces range by factor of
30
1.25
2
3
2-3
1.25 per meter
Compact materials, e.g. humans, have an complex effect,
In general attenuating most noticeably when closest to the antenna.
Mechanical
PCB Layout
4. Press the generate button to create a file of MAC
addresses. When the file is created, dismiss the
Settings… dialog by pressing OK. The file that was
created contains a hex record each MAC address
containing nine RETLW instructions encoding the
address.
5. .Each time programming session, select Load
SQTP file… form the Programmer menu. In each
programming cycle, MPLAB will read one hex
record and inset the values into ROM locations
0x006A to 0x007B. It will then comment out the
line so it is not used again. In this way the MAC
addresses will be automatically allocated in
sequence. NEVER maintain more than one copy of
the SQTP file, otherwise you risk duplicating MAC
addresses.
Radio Frequency
Optimizing RF Performance
For PCB pad layout, refer to the engineering drawing on
page 10. Note how the pads on the main board
protrude out from beneath the module. This provides a
point to apply heat when manually soldering and also for
continuity testing. In addition, the size of the pad
ensures a large reservoir of solder is available to the
actual contact area.
Soldering
If soldered using a reflow oven, the surface mount
module may be treated like a BGA package. The
quality of the joint may be tested by checking for
continuity between the pad on the upper side of the
board and the protruding part of the pad on the main
board.
The recommended reflow profile is shown in figure 8.
Small increases in temperature (no larger than 15oC)
may be needed depending on the density of the main
board. The module should be reflowed one time only.
The integral antenna supplied with Pixie is a modified
quarter wave F antenna with efficiency of approximately
70%. This is comparable to a dipole and about as high
as physically possible. Its radiation pattern is
approximately omnidirectional.
Free space range is approximately 120m. In-building
ranges of 20m to 40m would normally be expected.
The enclosure employed may affect antenna
performance. Avoid the use of metal enclosures. Gray
300
250
200
150
100
Figure 8. Recommended reflow profile
and black plastics should be used with caution. They
often contain carbon, which degrades performance
considerably. To test for the presence of carbon, heat
the plastic in a microwave oven for one minute. If it
melts, it probably contains carbon.
50
0
0
100
200 300
Time, Seconds
400
500
p8
17-Mar-08
Pixie DS481-17
? FlexiPanel Ltd
Patents may apply and/or pending
www.FlexiPanel.com
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