AT32F413
Series Reference Manual
2022.06.27
Page 268
Rev 2.00
19
Analog-to-digital converter (ADC)
19.1 ADC introduction
The ADC is a peripheral that converts an analog input signal into a 12-bit digital signal. Its sampling
rate is as high as 2 MSPS. It has up to 18 channels for sampling and conversion.
19.2 ADC main features
In terms of analog part:
12-bit resolution
Self-calibration time: 172 ADC clock cycles
ADC conversion time
ADC conversion time is 0.5
μs at 28 MHz
ADC supply requirement: Refer to the Datasheet
ADC input range: V
REF-
≤
V
IN
≤
V
REF+
In terms of digital control:
Regular channels and injected channels with different priority
Regular channels and injected channels both have their own trigger detection circuit
Each channel can independently define its own sampling time
Conversion sequence management supports various multi-channel conversion modes
Optional data alignment mode
Programmable voltage monitor threshold
Regual channels with DMA transfers
Interrupt generation at one of the following events:
―
End of the conversion of preempted group
―
End of the conversion of channels
―
Voltage outside the threshold programmed
―
ADC Master/slave mode
19.3 ADC structure
shows the block diagram of ADC1.
Differences between ADC2 and ADC1:
1.
ADC2 is not connected to the internal temperature sensor and internal reference voltage
2.
ADC2 has no DMA request. Refer to
Section 19.4.2
for more details