LPWA Module Series
BG77 Hardware Design
BG77_Hardware_Design 47 / 76
Table 22: Pin Definition of ADC Interfaces
The following table describes the characteristics of ADC interfaces.
Table 23: Characteristics of ADC Interfaces
1. ADC input voltage must not exceed 1.8V.
2. It is prohibited to supply any voltage to ADC pin when VBAT is removed.
3. It is recommended to use resistor divider circuit for ADC application, and the divider resistor accuracy
should be no less than 1%.
3.18. SPI Interface*
BG77 module provides one SPI interface which support master/slave mode.
Master mode: up to 50MHz
Slave mode: up to 25MHz
Pin Name Pin No. Description
ADC0 17 General purpose analog to digital converter interface
ADC1 18 General purpose analog to digital converter interface
Parameter Min. Typ. Max. Unit
Voltage Range 0.1 1.8 V
Resolution (LSB) 64.979 uV
Analog Bandwidth 500 kHz
Sample Clock 4.8 MHz
Input Resistance 10 MΩ
NOTES
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