LTE Standard Module Series
EC200T Series Hardware Design
EC200T_Series_Hardware_Design 52 / 90
Make sure the adjacent trace spacing is 2 times of the trace width and bus capacitance is less than
15 pF.
“*” means under development.
“
①
”
means only QuecOpen
scheme support
3.14. ADC
Interfaces
The module provides two analog-to-digital converter (ADC) interfaces.
AT+QADC=0
can be used to read
the voltage value on ADC0 pin.
AT+QADC=1
can be used to read the voltage value on ADC1 pin. For
more details about these AT commands, see
document [2]
.
In order to improve the accuracy of ADC, the trace of ADC should be surrounded by ground.
Table 19: Pin Definition of ADC Interfaces
Pin Name
Pin No.
Description
Comment
ADC1 44 General-purpose
ADC
interface
If unused, keep it open.
ADC0 45 General-purpose
ADC
interface
If unused, keep it open.
The following table describes the characteristic of the ADC function.
Table 20: Characteristic of the ADC
Parameter
Min.
Typ.
Max.
Unit
ADC1 Voltage Range
0
VBAT_BB
V
ADC0 Voltage Range
0
VBAT_BB
V
ADC Resolution
12
bits
NOTE