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STM32L053C8 Fiches technique(PDF) 95 Page - STMicroelectronics

No de pièce STM32L053C8
Description  Ultra-low-power 32-bit MCU Arm®-based Cortex®-M0, up to 64KB Flash, 8KB SRAM, 2KB EEPROM, LCD, USB, ADC, DAC
PDF  136 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L053C8 Fiches technique(HTML) 95 Page - STMicroelectronics

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DS10152 Rev 9
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STM32L053x6 STM32L053x8
Electrical characteristics
113
Figure 27. 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 28 or Figure 29,
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 28. 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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