Electro-Static Discharge - Quectel M12 Hardware Design

M12 Hardware Design
DCS 1800
DATA mode, GPRS ( 4 Rx,1 Tx ) CLASS 12
EGSM 900
DCS 1800
DATA mode, GPRS ( 1 Rx, 4 Tx ) CLASS 12
EGSM 900
DCS 1800
Note: GPRS Class 12 is the default setting. The module can be configured from GPRS Class 1
to Class 12 by "AT+QGPCLASS". Setting to lower GPRS class would make it easier to design
the power supply for the module.

5.5. Electro-static discharge

Although the GSM engine is generally protected against Electrostatic Discharge (ESD),
precautions about ESD protection should still be emphasized. Proper ESD handling and packaging
procedures must be applied throughout the processing, handling and operation of any applications
using the module.
The measured ESD values of the module are shown as the following table:
Table 32: The ESD endurance (Temperature:25℃,Humidity:45 %)
Tested point
VBAT,GND
Antenna port
PWRKEY
SIM Card Interface
SPK1P/1N, SPK2P/2N,
MIC1P/1N, MIC2P/2N
M12_Hardware_Design_V3.3
@power level #19,Typical 111mA
@power level #0 <490mA,Typical 464mA
@power level #7,Typical 172mA
@power level #15,Typical 102mA
@power level #5 <350mA,Typical 230mA
@power level #12,Typical 118mA
@power level #19,Typical 93mA
@power level #0 <300mA,Typical 216mA
@power level #7,Typical 118mA
@power level #15,Typical 94mA
@power level #5 <660mA,Typical 520mA
@power level #12,Typical 180mA
@power level #19,Typical 120mA
@power level #0 <530mA,Typical 477mA
@power level #7,Typical 198mA
@power level #15,Typical 106mA
Contact discharge
± 5KV
± 5KV
± 2KV
± 2KV
± 2KV
Air discharge
± 12KV
± 10KV
± 4KV
± 4KV
± 4KV
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