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DocID030538 Rev 3 161/226
STM32H743xI Electrical characteristics
196
Figure 39. Typical connection diagram using the ADC
1. Refer to Table 84 for the values of R
AIN
, R
ADC
 and C
ADC
.
2. C
parasitic
 represents the capacitance of the PCB (dependent on soldering and PCB layout quality) plus the 
pad capacitance (roughly 5 pF). A high C
parasitic
 value downgrades conversion accuracy. To remedy this, 
f
ADC
 should be reduced.
ai17534b
STM32
V
DD
AINx
I
L
±1 μA
0.6 V
V
T
R
AIN
(1)
C
parasitic
V
AIN
0.6 V
V
T
R
ADC
(1)
C
ADC
(1)
12-bit
converter
Sample and hold ADC 
converter
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