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STM32L151RE Datasheet(PDF) 106 Page - STMicroelectronics

Part # STM32L151RE
Description  Ultra-low-power 32-bit MCU Arm®-based Cortex®-M3 with 512KB Flash, 80KB SRAM, 16KB EEPROM, LCD, USB, ADC, DAC
PDF  136 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32L151RE Datasheet(HTML) 106 Page - STMicroelectronics

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Electrical characteristics
STM32L151xE STM32L152xE
106/136
DS10002 Rev 10
Figure 27. ADC accuracy characteristics
Figure 28. Typical connection diagram using the ADC
1. Refer to Table 57: Maximum source impedance RAIN max for the value of RAIN and Table 55: ADC
characteristics for the value of 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 downgrades conversion accuracy. To remedy this,
fADC must be reduced.
E
T = total unajusted error: maximum deviation
between the actual and ideal transfer curves
E
O = offset error: maximum deviation between the
first actual transition and the first ideal one
E
G = gain error: deviation between the last ideal
transition and the last actual one
E
D = differential linearity error: maximum deviation
between actual steps and the ideal one
E
L = integral linearity error: maximum deviation
between any actual transition and the end point
correlation line
(1) Example of an actual transfer curve
(2) Ideal transfer curve
(3) End-point correlation line
2n-1
2n-2
2n-3
7
6
5
4
3
2
1
0
23
4
5
6
1
72n-3
2n-2
2n-1
2n
V
REF+ (or VDDA)
Output code
E
O
E
T
E
L
E
G
E
D
1 LSB IDEAL
(1)
(3)
(2)
MS19880V4
= ADC resolution
n
ai17856e
STM32Lxx
VDDA
AINx
IL± 50 nA
RAIN(1)
Cparasitic
VAIN
12-bit
converter
CADC(1)
Sample and hold
ADC converter



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