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M20 Hardware Design
5.2 Absolute maximum ratings
The absolute maximum rating for power supply and voltage on digital and analog pins of module
are listed in the following table:
Table 32: Absolute maximum ratings
Parameter
VBAT
Peak current of power supply
RMS current of power supply (during one TDMA- frame)
Voltage at digit pins
Voltage at analog pins
Voltage at digit/analog pins in POWER DOWN mode
5.3 Operating temperatures
The operating temperature is listed in the following table:
Table 33: Operating temperature
Parameter
Normal temperature
Restricted operation*
Storage temperature
* When the module works in this temperature range, the deviations from the GSM specification
may occur. For example, the frequency error or the phase error could increase.
5.4 Power supply ratings
Table 34: The module power supply ratings
Param
Description
eter
VBAT
Supply voltage
Voltage
during
transmitting burst
M20_HD_V1.01
Conditions
Voltage must stay within the
min/max
values,
voltage drop, ripple, and spikes.
drop
Normal
condition,
control level for Pout max
Min
Max
0
4.7
0
2
0
0.7
-0.3
3.3
-0.3
3.0
-0.25
0.25
Min
Typ
-35
25
-45 to -35
-45
Min
3.4
including
power
Unit
V
A
A
V
V
V
Max
Unit
80
℃
80 to 85
℃
+90
℃
Typ
Ma
Unit
x
4.0
4.5
V
400 mV
- 66 -
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