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STM32F101X8 bảng dữ liệu(PDF) 68 Page - STMicroelectronics

tên linh kiện STM32F101X8
Giải thích chi tiết về linh kiện  Medium-density access line, ARM-based 32-bit MCU with 64 or 128 KB Flash, 6 timers, ADC and 7 communication interfaces
PDF  85 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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STM32F101X8 bảng dữ liệu(HTML) 68 Page - STMicroelectronics

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Electrical characteristics
STM32F101x8, STM32F101xB
68/85
Doc ID 13586 Rev 13
Figure 34.
Typical connection diagram using the ADC
1.
Refer to Table 41 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 35 or Figure 36,
depending on whether VREF+ is connected to VDDA or not. The 10 nF capacitors should be
ceramic (good quality). They should be placed them as close as possible to the chip.
Figure 35.
Power supply and reference decoupling (VREF+ not connected to VDDA)
1.
VREF+ and VREF- inputs are available only on 100-pin packages.
ai14139d
STM32F10xxx
VDD
AINx
IL±1 µA
0.6 V
VT
RAIN(1)
Cparasitic
VAIN
0.6 V
VT
RADC(1)
CADC(1)
12-bit
converter
Sample and hold ADC
converter
V REF+
STM32F10xxx
V DDA
V SSA/V REF-
1 µF // 10 nF
1 µF // 10 nF
ai14380b



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