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STM32L433CB bảng dữ liệu(PDF) 153 Page - STMicroelectronics

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STM32L433CB bảng dữ liệu(HTML) 153 Page - STMicroelectronics

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DS11449 Rev 5
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STM32L433xx
Electrical characteristics
193
6.3.18
Analog-to-Digital converter characteristics
Unless otherwise specified, the parameters given in Table 76 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 76. ADC characteristics(1) (2)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VDDA
Analog supply voltage
-
1.62
-
3.6
V
VREF+
Positive reference voltage
VDDA ≥ 2 V
2
-
VDDA
V
VDDA < 2 V
VDDA
V
VREF-
Negative reference
voltage
-VSSA
V
fADC
ADC clock frequency
Range 1
0.14
-
80
MHz
Range 2
0.14
-
26
fs
Sampling rate for FAST
channels
Resolution = 12 bits
-
-
5.33
Msps
Resolution = 10 bits
-
-
6.15
Resolution = 8 bits
-
-
7.27
Resolution = 6 bits
-
-
8.88
Sampling rate for SLOW
channels
Resolution = 12 bits
-
-
4.21
Resolution = 10 bits
-
-
4.71
Resolution = 8 bits
-
-
5.33
Resolution = 6 bits
-
-
6.15
fTRIG
External trigger frequency
fADC = 80 MHz
Resolution = 12 bits
-
-
5.33
MHz
Resolution = 12 bits
-
-
15
1/fADC
VCMIN
Input common mode
Differential mode
(VREF++
VREF-)/2
- 0.18
(VREF++
VREF-)/2
(VREF++
VREF-)/2
+ 0.18
V
VAIN (3)
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
-
1
conversion
cycle
tCAL
Calibration time
fADC = 80 MHz
1.45
µs
-116
1/fADC



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