Adc Introduction - ST STM32F413 Reference Manual

RM0430
13 Analog-to-digital converter (ADC)
13.1

ADC introduction

The 12-bit ADC is a successive approximation analog-to-digital converter. It has up to 19
multiplexed channels allowing it to measure signals from 16 external sources, two internal
sources, and the V
single, continuous, scan or discontinuous mode. The result of the ADC is stored into a left-
or right-aligned 16-bit data register.
The analog watchdog feature allows the application to detect if the input voltage goes
beyond the user-defined, higher or lower thresholds.
13.2 ADC main features
•
12-bit, 10-bit, 8-bit or 6-bit configurable resolution
• Interrupt generation at the end of conversion, end of injected conversion, and in case of
analog watchdog or overrun events
•
Single and continuous conversion modes
•
Scan mode for automatic conversion of channel 0 to channel 'n'
•
Data alignment with in-built data coherency
•
Channel-wise programmable sampling time
•
External trigger option with configurable polarity for both regular and injected
conversions
•
Discontinuous mode
•
Configurable delay between conversions in Dual/Triple interleaved mode
•
ADC supply requirements: 2.4 V to 3.6 V at full speed and down to 1.8 V at slower
speed
• ADC input range: ≤ V
•
DMA request generation during regular channel conversion
Figure 59
13.3 ADC functional description
Figure 59
Name
V
REF+
V
DDA
channel. The A/D conversion of the channels can be performed in
BAT
≤ V
IN
shows the block diagram of the ADC.
shows a single ADC block diagram and
Figure 59. Single ADC block diagram
Signal type
Input, analog reference
positive
Input, analog supply
DocID029473 Rev 3
REF+
Table 74
Table 74. ADC pins
The higher/positive reference voltage for the ADC,
1.8 V ≤ V
REF+
Analog power supply equal to V
2.4 V ≤V
DDA
1.8 V ≤V
DDA
Analog-to-digital converter (ADC)
gives the ADC pin description.
Remarks
≤ V
DDA
and
DD
≤V (3.6 V) for full speed
DD
≤V (3.6 V) for reduced speed
DD
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