CD00237391 Datasheet, PDF (118/177 Pages) STMicroelectronics – ARM-based 32-bit MCU, 150DMIPs, up to 1 MB Flash/128+4KB RAM

Electrical characteristics
STM32F20xxx
Figure 50. Typical connection diagram using the ADC
RAIN(1) _AINx
VAIN
Cparasitic
VDD
VT
0.6 V
VT
0.6 V
STM32F
Sample and hold ADC
converter
RADC(1) _12-bit
converter
IL±1 µA
CADC(1)
ai17534
1. Refer to Table 64 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 7 pF). A high C_parasitic value downgrades conversion accuracy. To remedy this,
f_ADC should be reduced.
118/177
Doc ID 15818 Rev 9