SIM5218E Hardware Design
SIM5218E_ Hardware Design_V1.06
2012.09.21
61
@Power 21dBm Typical 450mA
@Power 10dBm Typical 300mA
HSDPA Data
WCDMA 2100
@Power 23dBm CQI=22 Typical 560mA
@Power 21dBm CQI=5 Typical 480mA
@Power -5dBm CQI=22 Typical 250mA
WCDMA 1900
@Power 23dBm CQI=22 Typical 580mA
@Power 21dBm CQI=5 Typical 500mA
@Power -5dBm CQI=22 Typical 250mA
WCDMA 900
@Power 23dBm CQI=22 Typical 570mA
@Power 21dBm CQI=5 Typical 500mA
@Power -5dBm CQI=22 Typical 250mA
5.5 Electro-Static discharge
Normally SIM5218E is mounted on customer host board, although some ESD components have
been added in SIM5218E, to improve ESD, one should put some ESD components on customer
host board. The ESD components should be placed beside the connectors which the human body
might touch, such as SIM card holder, T-flash card holder, audio jacks, switches, keys, etc..
Below is the SIM5218E ESD performance measurement table, the results are got from our EVB
board test.
Table 37:
The ESD performance measurement table (Temperature: 25
, Humidity:
℃
45% )
Part
Contact discharge
Air discharge
VBAT,GND
±4KV
±10KV
UART,USB
±3KV
±8KV
Antenna port
±4KV
±10KV
Other port
±3KV
±8KV
In order to get the best ESD performance, one must deal carefully with ground of SIM5218E
on host board, which is most important. Here are some advices:
1.
Bare the copper on the host board.
Figure 36 is SIM5218E PCB decal. There is a big area which is poured with copper.
When one mounts the SIM5218E on host board, the bottom shield of SIM5218E can be
connected to ground well through this copper area. The SIM5218E PCB decal can be got
from our FAE or sales people.
2.
Choose
2.0mm height 70-pin socket for host board.
Because the height of 70-pin plug on SIM5218E is 1.5mm, in order to better connecting the
SIM5218E to the ground of the host board, it is suggested to choose 2.0mm height 70-pin socket
for host board. NAS AXK770247G is suitable. 2.5mm will be too high, it will be suspending
above host board. 1.5mm will be too tight.
