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STM32L071VB Folha de dados(PDF) 101 Page - STMicroelectronics

Nome de Peças STM32L071VB
Descrição Electrónicos  Access line ultra-low-power 32-bit MCU Arm®-based Cortex®-M0, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, ADC
PDF  148 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
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STM32L071VB Folha de dados(HTML) 101 Page - STMicroelectronics

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DS10690 Rev 7
101/148
STM32L071xx
Electrical characteristics
112
Figure 31. Typical connection diagram using the ADC
1. Refer to Table 62: ADC characteristics 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 32 or Figure 33,
depending on whether VREF+ is connected to VDDA or not. The 10 nF capacitors should be
ceramic (good quality). They should be placed as close as possible to the chip.
Figure 32. Power supply and reference decoupling (VREF+ not connected to VDDA)
MSv34712V1
VDDA
AINx
IL±50nA
VT
RAIN(1)
Cparasitic
VAIN
VT
RADC
12-bit
converter
CADC
Sample and hold ADC
converter
MS39601V1
VREF+
STM32Lxx
VDDA
VSSA / VREF–
1 μF // 100 nF
1 μF // 100 nF



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