Adc Main Features - ST STM32L4x6 Reference Manual

RM0351
16.2

ADC main features

• High-performance features
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Oversampler
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Low-power features
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Each ADC features an external analog input channel
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In addition, there are five internal dedicated channels
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Up to 3x ADCs, out of which two of them can operate in dual mode
ADC1 is connected to 16 external channels + 3 internal channels
ADC2 is connected to 16 external channels + 2 internal channels
ADC3 is connected to 12 external channels + 4 internal channels
12, 10, 8 or 6-bit configurable resolution
ADC conversion time:
Fast channels: 0.188 µs for 12-bit resolution (5.33 Ms/s)
Slow channels: 0.238 µs for 12-bit resolution (4.21 Ms/s)
ADC conversion time is independent from the AHB bus clock frequency
Faster conversion time by lowering resolution: 0.16 µs for 10-bit resolution
Can manage Single-ended or differential inputs (programmable per channels)
AHB slave bus interface to allow fast data handling
Self-calibration
Channel-wise programmable sampling time
Up to four injected channels (analog inputs assignment to regular or injected
channels is fully configurable)
Hardware assistant to prepare the context of the injected channels to allow fast
context switching
Data alignment with in-built data coherency
Data can be managed by GP-DMA for regular channel conversions
4 dedicated data registers for the injected channels
16-bit data register
Oversampling ratio adjustable from 2 to 256x
Programmable data shift up to 8-bit
Speed adaptive low-power mode to reduce ADC consumption when operating at
low frequency
Allows slow bus frequency application while keeping optimum ADC performance
(0.188 µs conversion time for fast channels can be kept whatever the AHB bus
clock frequency)
Provides automatic control to avoid ADC overrun in low AHB bus clock frequency
application (auto-delayed mode)
Up to 5 fast channels from dedicated GPIO pads
Up to 11 slow channels from dedicated GPIO pads
The internal reference voltage (V
The internal temperature sensor (V
The V monitoring channel (V
BAT
DAC1 and DAC2 internal channels, connected to ADC2 and ADC3
DocID024597 Rev 3
Analog-to-digital converters (ADC)
), connected to ADC1
REFINT
), connected to ADC1 and ADC3
TS
/3), connected to ADC1 and ADC3
BAT
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