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STM32L412C8I6TR bảng dữ liệu(PDF) 137 Page - STMicroelectronics

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STM32L412C8I6TR bảng dữ liệu(HTML) 137 Page - STMicroelectronics

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DS12469 Rev 4
137/192
STM32L412xx
Electrical characteristics
163
6.3.18
Analog-to-Digital converter characteristics
Unless otherwise specified, the parameters given in Table 75 are preliminary values derived
from tests performed under ambient temperature, fPCLK frequency and VDDA supply voltage
conditions summarized in Table 21: General operating conditions.
Note:
It is recommended to perform a calibration after each power-up.
Table 75. 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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