Smart Machine Smart Decision
SIM900-DS_Hardware Design_V1.00
40
2013-01-20
PCL=0
167
DCS1800
PCS1900
PCL=7
85
PCL=15
68
mA
I
VBAT-peak
Peak current During Tx burst
2
A
* In above table the current consumption value is the typical one of the module tested in laboratory. In the mass production stage,
there may be differences among each individual.
5.9
Electro-Static Discharge
SIM900-DS is an ESD sensitive component, so more attention should be paid to the procedure of handling and
packaging. The ESD test results are shown in the following table.
Table
22
: The ESD characteristics (Temperature: 25
, Humidity
℃
: 45 %)
Pin
Contact discharge
Air discharge
VBAT
±5KV
±10KV
GND
±4KV
±10KV
RXD, TXD
±3KV
±6KV
Antenna port
±5KV
±10KV
SPK1_P/ SPK1_N/SPK2_P
MIC1_P/ MIC1_N/ MIC2_P
±2KV
±6KV
PWRKEY
±1KV
±6KV
5.10
Radio Characteristics
5.10.1
Module RF Output Power
The following table shows the module conducted output power, it is followed by the 3GPP TS 05.05 technical
specification requirement.
Table 23: SIM900-DS GSM850 and EGSM900 conducted RF output power
GSM850 and EGSM900
Tolerance (dB) for conditions
PCL
Nominal output power (dBm)
Normal
Extreme
0-2
39
±2
±2.5
3
37
±3
±4
4
35
±3
±4
5
33
±3
±4
6
31
±3
±4
7
29
±3
±4
8
27
±3
±4
