GigaDevice Semiconductor GD32VF103 - Functional Description

GD32VF103 User Manual
154
– Oversampling ratio adjustable from 2 to 256x
– Programmable data shift up to 8-bit
 ADC supply requirements: 2.6V to 3.6V, and typical power supply voltage is 3.3V
 ADC input range: V
REF-
≤V
IN
≤V
REF+
11.3. Pins and internal signals
Figure 11-1. ADC module block diagram shows the ADC block diagram. Table 11-1. ADC
internal signals gives the ADC internal signals and Table 11-2. ADC pins definition gives
the ADC pin description.
Table 11-1. ADC internal signals
Internal signal name
Signal type
Description
V
SENSE
Input
Internal temperature sensor output voltage
V
REFINT
Input
Internal voltage reference output voltage
Table 11-2. ADC pins definition
Name
Signal type
Remarks
V
DDA
Input, analog power
supply
Analog power supply equal to V
DD
and
2.6 V ≤ V
DDA
≤ 3.6 V
V
SSA
Input, analog power
supply ground
Ground for analog power supply equal to V
SS
V
REF+
Input, positive reference
voltage
The positive reference voltage for the ADC, 2.4 V
≤ V
REF+
≤ V
DDA
V
REF-
Input, negative reference
voltage
The negative reference voltage for the ADC,V
REF-
= V
SSA
ADCx_IN[15:0]
Input, Analog signals
Up to 16 external channels
Note: The ADC_IN[15:0] should set as Analog Input mode.
11.4. Functional description
Figure 11-1. ADC module block diagram