User's Manual

SIM7075G User Manual V1.00
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64ms ON, 300ms OFF
Data transmit (PPP dial-up state and use of data services such as
internal TCP/FTP/HTTP)
OFF
Power off or PSM mode
NETLIGHT output low level as
“
OFF
”
and high level as
“
ON
”
.
3.10 ADC interface
SIM7075G module provides a 10-bit high sample rate (ADC) interfaces. It is available for digitizing analog
signals such as battery voltage and so on. Its input voltage range is from 0V to 1.8v. That is the maximum
measurement range of ADC cannot exceed 1.8V. If the input voltage of ADC PIN exceeds its range, it is
necessary to implement the resistance partial pressure on the hardware.
The electronic specifications are shown in the following table.
Table 19: ADC electronic characteristics
Characteristics
Min.
Typ.
Max.
Unit
Input Range
0
1.875
V
Internal pull-up resistor
400
KΩ
Input serial resistance
1
–
–
M
Ω
“AT+CADC” can be used to read the voltage of the ADC pin, for more details, please refer to document
[1].
3.11 LDO output
SIM7075G has a LDO power output namedVDD_EXT. The output voltage is 1.8V. This voltage can only be
pulled up for the external GPIO or power supply for the level conversion circuit.
NOTE
NOTE