LQFP64 datasheet(67/79 Pages) STMICROELECTRONICS

Part #	LQFP64

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

PDF	79 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

67 / 79 page

STM32F101x4, STM32F101x6

Electrical characteristics

Doc ID 15058 Rev 5

67/79

Figure 33.

Typical connection diagram using the ADC

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

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

ai14139d

STM32F10xxx

VDD

AINx

IL±1 µA

0.6 V

RAIN(1)

Cparasitic

VAIN

0.6 V

RADC(1)

CADC(1)

12-bit

converter

Sample and hold ADC

converter

VDDA

STM32F10xx4/6

1 µF // 10 nF

VSSA

ai15498

LQFP64 Datasheet(PDF) 67 Page - STMicroelectronics