Sunsea AIoT SimCom SIM7090G User Manual page 40

3.10 ADC interface
SIM7090G has two dedicated ADC pins. They are available for digitizing analog signals such as battery
voltage and so on. The 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
Table 19: Pin Definition of ADC Interfaces
Pin Name Pin No.
ADC0 17
ADC1 18
Table 20: ADC electronic characteristics
Characteristics
Input Range
Internal pull-up resistor
Input serial resistance
NOTE
"AT+CADC" can be used to read the voltage of the ADC pin, for more details, please refer to document
[1].
www.simcom.com
I/O Description
General purpose analog to
AI
digital converter interface.
General purpose analog to
AI
digital converter interface.
Min. Typ.
0
400
1 –
SIM7090G User Manual V1.01
Comment
1.8V power domain
1.8V power domain
Max. Unit
1.875 V
KΩ
– MΩ
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