Datasheet

DS10668 Rev 6 85/126
STM32L031x4/6 Electrical characteristics
96
Figure 28. Recommended NRST pin protection
1. The reset network protects the device against parasitic resets.
2. The external capacitor must be placed as close as possible to the device.
3. The user must ensure that the level on the NRST pin can go below the V
IL(NRST)
max level specified in
Table 56. Otherwise the reset will not be taken into account by the device.
6.3.15 12-bit ADC characteristics
Unless otherwise specified, the parameters given in Table 57 are values derived from tests
performed under ambient temperature, f
PCLK
frequency and V
DDA
supply voltage conditions
summarized in Table 20: General operating conditions.
Note: It is recommended to perform a calibration after each power-up.
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Table 57. ADC characteristics
Symbol Parameter Conditions Min Typ Max Unit
V
DDA
Analog supply voltage for
ADC on
Fast channel 1.65 - 3.6
V
Standard channel 1.75
(1)
-3.6
I
DDA (ADC)
Current consumption of the
ADC on V
DDA
1.14 Msps - 200 -
µA
10 ksps - 40 -
Current consumption of the
ADC on V
DD
(2)
1.14 Msps - 70 -
10 ksps - 1 -
f
ADC
ADC clock frequency
Voltage scaling Range 1 0.14 - 16
MHzVoltage scaling Range 2 0.14 - 8
Voltage scaling Range 3 0.14 - 4
f
S
(3)
Sampling rate 0.05 - 1.14 MHz
f
TRIG
(3)
External trigger frequency
f
ADC
= 16 MHz - - 941 kHz
--171/f
ADC
V
AIN
Conversion voltage range 0 - V
DDA
V
R
AIN
(3)
External input impedance
See Equation 1 and
Table 5 8 for details
--50kΩ
R
ADC
(3)(4)
Sampling switch resistance - - 1 kΩ
C
ADC
(3)
Internal sample and hold
capacitor
--8pF
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