Table 52. Adc Accuracy - STMicroelectronics STM32F031F4 Manual

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STM32F031x4 STM32F031x6
T (cycles)
s
55.5
71.5
239.5
1. Guaranteed by design, not tested in production.
Symbol
ET Total unadjusted error
EO Offset error
EG Gain error
ED Differential linearity error
EL Integral linearity error
ET Total unadjusted error
EO Offset error
EG Gain error
ED Differential linearity error
EL Integral linearity error
ET Total unadjusted error
EO Offset error
EG Gain error
ED Differential linearity error
EL Integral linearity error
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 I
accuracy.
3. Better performance may be achieved in restricted V
4. Data based on characterization results, not tested in production.
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Table 51. R max for f
AIN

Table 52. ADC accuracy

Parameter
f
f
V
T
f
f
V
T
f
f
V
T
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= 14 MHz (continued)
ADC
t (µs)
S
3.96
5.11
17.1
(1)(2)(3)
Test conditions
= 48 MHz,
PCLK
= 14 MHz, R < 10 k
ADC AIN
= 3 V to 3.6 V
DDA
= 25 °C
A
= 48 MHz,
PCLK
= 14 MHz, R < 10 k
ADC AIN
= 2.7 V to 3.6 V
DDA

= 40 to 105 °C
A
= 48 MHz,
PCLK
= 14 MHz, R < 10 k
ADC AIN
= 2.4 V to 3.6 V
DDA
= 25 °C
A
and I
INJ(PIN) INJ(PIN)
, frequency and temperature ranges.
DDA
DocID025743 Rev 3
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Electrical characteristics
R max (k)
AIN
50
NA
NA
Typ Max
±1.3
±1 ±1.5
±0.5 ±1.5
±0.7
±0.8 ±1.5
±3.3
±1.9 ±2.8
±2.8
±0.7 ±1.3
±1.2 ±1.7
±3.3
±1.9 ±2.8
±2.8
±0.7 ±1.3
±1.2 ±1.7
in Section 6.3.14 does not affect the ADC
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(1)
(4)
Unit
±2
LSB
±1
±4
±3 LSB
±4
±3 LSB
77/113
86
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