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STM32F030C8 датащи(PDF) 65 Page - STMicroelectronics

номер детали STM32F030C8
подробное описание детали  Value-line ARM-based 32-bit MCU with 16 to 64-KB Flash, timers, ADC, communication interfaces, 2.4-3.6 V operation
PDF  88 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM32F030C8 датащи(HTML) 65 Page - STMicroelectronics

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STM32F030x4 STM32F030x6 STM32F030x8
Electrical characteristics
73
Equation 1: RAIN max formula
The formula above (Equation 1) is used to determine the maximum external impedance
allowed for an error below 1/4 of LSB. Here N = 12 (from 12-bit resolution).
Table 49. RAIN max for fADC = 14 MHz
Ts (cycles)
tS (µs)
RAIN max (k)
(1)
1. Guaranteed by design, not tested in production.
1.5
0.11
0.4
7.5
0.54
5.9
13.5
0.96
11.4
28.5
2.04
25.2
41.5
2.96
37.2
55.5
3.96
50
71.5
5.11
NA
239.5
17.1
NA
Table 50. ADC accuracy(1)(2)(3)
1. ADC DC accuracy values are measured after internal calibration.
2. ADC Accuracy vs. Negative Injection Current: Injecting negative current on any of the standard
(non-robust) analog input pins should be avoided as this significantly reduces the accuracy of
the conversion being performed on another analog input. It is recommended to add a Schottky
diode (pin to ground) to standard analog pins which may potentially inject negative current.
Any positive injection current within the limits specified for IINJ(PIN) and IINJ(PIN) in
Section 6.3.14 does not affect the ADC accuracy.
3. Better performance may be achieved in restricted VDDA, frequency and temperature ranges.
Symbol
Parameter
Test conditions
Typ
Max(4)
4. Data based on characterization results, not tested in production.
Unit
ET
Total unadjusted error
fPCLK = 48 MHz,
fADC = 14 MHz, RAIN < 10 k,
VDDA = 2.7 V to 3.6 V
TA = 40 to 85 °C
±3.3
±4
LSB
EO
Offset error
±1.9
±2.8
EG
Gain error
±2.8
±3
ED
Differential linearity error
±0.7
±1.3
EL
Integral linearity error
±1.2
±1.7
R
AIN
T
S
f
ADC
C
ADC
2
N2
+

ln
--------------------------------------------------------------
R
ADC
–



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