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STM32F031x4 STM32F031x6
Electrical characteristics
86
Figure 23. Recommended NRST pin protection
1.
The external capacitor protects the device against parasitic resets.
2.
The user must ensure that the level on the NRST pin can go below the V
IL(NRST)
max level specified in
Table 49: NRST pin characteristics
. Otherwise the reset will not be taken into account by the device.
6.3.16 12-bit
ADC
characteristics
Unless otherwise specified, the parameters given in
are preliminary values derived
from tests performed under ambient temperature, f
PCLK
frequency and V
DDA
supply voltage
conditions summarized in
Table 18: General operating conditions
.
Note:
It is recommended to perform a calibration after each power-up.
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Table 50. ADC characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
V
DDA
Analog supply voltage for
ADC ON
-
2.4
-
3.6
V
I
DDA (ADC)
Current consumption of
the ADC
(1)
V
DD
= V
DDA
= 3.3 V
-
0.9
-
mA
f
ADC
ADC clock frequency
-
0.6
-
14
MHz
f
S
(2)
Sampling rate
-
0.05
-
1
MHz
f
TRIG
(2)
External trigger frequency
f
ADC
= 14 MHz
-
-
823
kHz
-
-
-
17
1/f
ADC
V
AIN
Conversion voltage range
-
0
-
V
DDA
V
R
AIN
(2)
External input impedance
See
Equation 1
and
for details
-
-
50
k
R
ADC
(2)
Sampling switch
resistance
-
-
-
1
k
C
ADC
(2)
Internal sample and hold
capacitor
-
-
-
8
pF
t
CAL
(2)
Calibration time
f
ADC
= 14 MHz
5.9
µs
-
83
1/f
ADC
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http://www.vicor.top/
021-31660491