Table 57. Maximum Source Impedance Rain Max; Figure 27. Adc Accuracy Characteristics; Figure 28. Typical Connection Diagram Using The Adc - STMicroelectronics STM32L151QCH6 Manual

STM32L151xC/C-A STM32L152xC/C-A
1. Refer to
characteristics
2. C
parasitic
pad capacitance (roughly 7 pF). A high C
this, f
ADC

Figure 27. ADC accuracy characteristics

Figure 28. Typical connection diagram using the ADC

Table 57: Maximum source impedance RAIN max
for the value of C
ADC
represents the capacitance of the PCB (dependent on soldering and PCB layout quality) plus the
should be reduced.
DocID026119 Rev 5
for the value of R
.
value will downgrade conversion accuracy. To remedy
parasitic
Electrical characteristics
and Table 55: ADC
AIN
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