Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
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DocID17659 Rev 10
Figure 28. Maximum dynamic current consumption on V
REF+
supply pin during ADC
conversion
General PCB design guidelines
Power supply decoupling should be performed as shown in The 10 nF capacitors should be
ceramic (good quality). They should be placed as close as possible to the chip.
ADC clock
Sampling (n cycles)
Conversion (12 cycles)
I
ref+
300µA
700µA
Table 56. R
AIN
max for f
ADC
= 16 MHz
(1)
Ts
(cycles)
Ts
(µs)
R
AIN
max (kOhm)
Multiplexed channels
Direct channels
2.4 V < V
DDA
< 3.6 V 1.8 V < V
DDA
< 2.4 V 2.4 V < V
DDA
< 3.3 V 1.8 V < V
DDA
< 2.4 V
4
0.25
Not allowed
Not allowed
0.7
Not allowed
9
0.5625
0.8
Not allowed
2.0
1.0
16
1
2.0
0.8
4.0
3.0
24
1.5
3.0
1.8
6.0
4.5
48
3
6.8
4.0
15.0
10.0
96
6
15.0
10.0
30.0
20.0
192
12
32.0
25.0
50.0
40.0
384
24
50.0
50.0
50.0
50.0
1. Guaranteed by design, not tested in production.