STM32F101X6_08 STMICROELECTRONICS [STMicroelectronics], STM32F101X6_08 Datasheet - Page 59

• Manufacturer Part Number: STM32F101X6_08
• Description: Access line, advanced ARM-based 32-bit MCU with Flash memory, six 16-bit timers, ADC and seven communication interfaces
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STM32F101xx
Equation 1: R
The formula above
error below 1/4 of LSB. Here N = 12 (from 12-bit resolution).
Table 42.
1. Data guaranteed by design, not tested in production.
Table 43.
1. ADC DC accuracy values are measured after internal calibration.
2. Data based on characterization, not tested in production.
3. ADC Accuracy vs. Negative Injection Current: Injecting negative current on any of the standard (non-
1.5
7.5
13.5
28.5
41.5
55.5
71.5
239.5
Symbol
R
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
affect the ADC accuracy.
EO
EG
ED
ET
EL
AIN
<
--------------------------------------------------------------- - R
f
ADC
T
Total unadjusted error
Offset error
Gain error
Differential linearity error
Integral linearity error
s
R
(cycles)
ADC accuracy - limited test conditions
×
AIN
AIN
C
(Equation
ADC
Parameter
max for f
max formula:
(3)
t
(3)
S
×
ln
(
1) is used to determine the maximum external impedance allowed for an
2
ADC
N
(3)
(3)
+
0.11
0.54
0.96
2.04
2.96
3.96
5.11
17.1
2
= 14 MHz
(3)
)
–
f
f
V
T
Measurements made after
ADC calibration
V
ADC
PCLK2
ADC
A
DDA
REF+
= 25 °C
= 14 MHz, R
(1)
= 3 V to 3.6 V
t
= V
S
= 56 MHz,
Test conditions
(µs)
DDA
INJ(PIN)
AIN
(1)
and ΣI
< 10 kΩ ,
INJ(PIN)
1.2
10
19
41
60
80
104
350
Electrical characteristics
in
±1.3
±0.5
±0.7
±0.8
Typ
±1
Section 5.3.12
R
AIN
max (kΩ)
Max
±1.5
±1.5
±1.5
±2
±1
(2)
does not
Unit
LSB
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