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STM32F030x4 bảng dữ liệu(PDF) 66 Page - STMicroelectronics

tên linh kiện STM32F030x4
Giải thích chi tiết về linh kiện  Value-line ARM-based 32-bit MCU with 16 to 64-KB Flash, timers, ADC, communication interfaces, 2.4-3.6 V operation
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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STM32F030x4 bảng dữ liệu(HTML) 66 Page - STMicroelectronics

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Electrical characteristics
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DocID024849 Rev 1
Figure 20. ADC accuracy characteristics
Figure 21. Typical connection diagram using the ADC
1.
Refer to Table 48: 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 10: Power supply
scheme. The 10 nF capacitor should be ceramic (good quality) and it should be placed as
close as possible to the chip.
EO
EG
1LSBIDEAL
(1) Example of an actual transfer curve
(2) The ideal transfer curve
(3) End point correlation line
ET=Total Unadjusted Error: maximum deviation
between the actual and the ideal transfer curves.
EO=Offset Error: deviation between the first actual
transition and the first ideal one.
EG=Gain Error: deviation between the last ideal
transition and the last actual one.
ED=Differential Linearity Error: maximum deviation
between actual steps and the ideal one.
EL=Integral Linearity Error: maximum deviation
between any actual transition and the end point
correlation line.
4095
4094
4093
5
4
3
2
1
0
7
6
12
3
4
5
6
7
4093 4094 4095 4096
(1)
(2)
ET
ED
EL
(3)
VDDA
VSSA
MS19880V1
1LSBIDEAL
4096
VDDA
MS19881V2
VDDA
AINx
IL±1 μA
0.6 V
VT
RAIN(1)
Cparasitic
VAIN
0.6 V
VT
RADC
12-bit
converter
CADC
Sample and hold ADC
converter



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