SN8P1700
8-bit micro-controller build-in 12-bit ADC
SONiX TECHNOLOGY CO., LTD
Page 169
Revision 1.93
ADC CIRCUIT
AVREFH is connected to VDD.
AVREFH is connected to external AD reference voltage.
Figure 11-2. The AINx and AVREFH Circuit of AD Converter
Note: The capacitor between AIN and GND is a bypass capacitor. It is helpful to stable the analog signal.
Users can omit it.
VDD
AVREF
AIN0/P40
Analog Signal Input
0.1uF
MCU
VDD
AVREF
AIN0/P40
Analog Signal Input
0.1uF
MCU
VDD
AVREF
AIN0/P40
Analog Signal Input
0.1uF
MCU
Reference Voltage Input
47uF
VDD
AVREF
AIN0/P40
Analog Signal Input
0.1uF
MCU
Reference Voltage Input
47uF