STM32F101R4 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM32F101R4

Low-density access line, ARM-based 32-bit MCU with 16 or 32 KB Flash, 5 timers, ADC and 4 communication interfaces

STMicroelectronics 

STM32F101x4, STM32F101x6

Electrical characteristics

Figure 33. Typical connection diagram using the ADC

RAIN(1) AINx

VAIN

Cparasitic

VDD

VT

0.6 V

VT

0.6 V

STM32F10xxx

Sample and hold ADC

converter

RADC(1) 12-bit

converter

IL±1 µA

CADC(1)

ai14139d

1. Refer to Table 42 for the values of RAIN, RADC and CADC.

2. Cparasitic represents the capacitance of the PCB (dependent on soldering and PCB layout quality) plus the

pad capacitance (roughly 7 pF). A high Cparasitic value will downgrade conversion accuracy. To remedy

this, fADC should be reduced.

General PCB design guidelines

Power supply decoupling should be performed as shown in Figure 34. The 10 nF capacitors

should be ceramic (good quality). They should be placed them as close as possible to the

chip.

Figure 34. Power supply and reference decoupling

STM32F10xx4/6

VDDA

1 µF // 10 nF

VSSA

ai15498

Doc ID 15058 Rev 5

67/79

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