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STM32L486xx
6.3.17
Electrical characteristics
Analog-to-Digital converter characteristics
Unless otherwise specified, the parameters given in Table 63 are preliminary values derived
from tests performed under ambient temperature, fPCLK frequency and VDDA supply voltage
conditions summarized in Table 22: General operating conditions.
Note:
It is recommended to perform a calibration after each power-up.
Table 63. ADC characteristics(1) (2)
Symbol
Parameter
VDDA
Analog supply voltage
VREF+
Positive reference voltage
VREF-
Negative reference
voltage
fADC
ADC clock frequency
Min
Typ
Max
Unit
-
1.62
-
3.6
V
2
-
VDDA
V
VDDA ≥ 2 V
VDDA < 2 V
-
VDDA
V
VSSA
V
Range 1
-
-
80
Range 2
-
-
26
Resolution = 12 bits
-
-
5.33
Resolution = 10 bits
-
-
6.15
Resolution = 8 bits
-
-
7.27
Resolution = 6 bits
-
-
8.88
Resolution = 12 bits
-
-
4.21
Resolution = 10 bits
-
-
4.71
Resolution = 8 bits
-
-
5.33
Resolution = 6 bits
-
-
6.15
fADC = 80 MHz
Resolution
= 12 bits
External trigger frequency
-
-
5.33
MHz
Resolution = 12 bits
-
-
15
1/fADC
Sampling rate for FAST
channels
fs
Sampling rate for SLOW
channels
fTRIG
Conditions
MHz
Msps
Conversion voltage
range(2)
-
0
-
VREF+
V
RAIN
External input impedance
-
-
-
50
kΩ
CADC
Internal sample and hold
capacitor
-
-
5
-
pF
tSTAB
Power-up time
-
tCAL
Calibration time
tLATR
Trigger conversion
latency Regular and
injected channels without
conversion abort
VAIN (3)
fADC = 80 MHz
-
1
conversion
cycle
1.45
µs
116
1/fADC
CKMODE = 00
1.5
2
2.5
CKMODE = 01
-
-
2.0
CKMODE = 10
-
-
2.25
CKMODE = 11
-
-
2.125
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