Quectel BG950A-GL - ADC Interfaces

LPWA Module Series
BG950A-GL&BG951A-GL_Hardware_Design
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Figure 21: Reference Design of PCM Application with Audio Codec
4.5. ADC Interfaces
The module provides two Analog-to-Digital Converter (ADC) interfaces. To improve the accuracy of ADC
voltage values, the traces of ADC should be surrounded with ground.
Table 20: Pin Definition of ADC Interfaces
The voltage value on ADC pins can be read via AT+QADC=<port>:
 AT+QADC=0: read the voltage value on ADC0
 AT+QADC=1: read the voltage value on ADC1
For more details about the AT command, see document [3].
The resolution of the ADC is up to 12 bits. The following table describes the characteristic of the ADC
interfaces.
Pin Name
Pin No.
I/O
Description
Comment
ADC0
24
AI
General-purpose ADC interface
Voltage range: 0–1.8 V
ADC1
2
AI
General-purpose ADC interface