STM32F103C4H6ATR STMICROELECTRONICS [STMicroelectronics], STM32F103C4H6ATR Datasheet - Page 65

• Manufacturer Part Number: STM32F103C4H6ATR
• Description: Low-density performance line, ARM-based 32-bit MCU with 16 or 32 KB Flash, USB, CAN, 6 timers, 2 ADCs, 6 communication interfaces
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Table 48.
1. ADC DC accuracy values are measured after internal calibration.
2. Better performance could be achieved in restricted V
3. ADC Accuracy vs. Negative Injection Current: Injecting negative current on any of the standard (non-
4. Based on characterization, not tested in production.
Figure 29. ADC accuracy characteristics
4095
4094
4093
Symbol
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
7
6
5
4
3
2
1
0
V
SSA
[1LSB
1
E
Total unadjusted error
Offset error
Gain error
Differential linearity error
Integral linearity error
O
IDEAL
ADC accuracy
2
=
V
4096
3
REF+
Parameter
4
(or
V
5
1 LSB
4096
DDA
E
6
(1) (2) (3)
T
depending on package)]
IDEAL
Doc ID 15060 Rev 3
E
7
L
(2)
f
f
V
Measurements made after
ADC calibration
E
PCLK2
ADC
D
DDA
4093 4094 4095 4096
(3)
= 14 MHz, R
= 2.4 V to 3.6 V
= 56 MHz,
Test conditions
DD
(1)
, frequency and temperature ranges.
E
INJ(PIN)
G
V
DDA
AIN
and  I
< 10 k,
(1) Example of an actual transfer curve
(2) The ideal transfer curve
(3) End point correlation line
E
between the actual and the ideal transfer curves.
E
transition and the first ideal one.
E
transition and the last actual one.
E
between actual steps and the ideal one.
E
between any actual transition and the end point
correlation line.
T
O
G
D
L
=Total Unadjusted Error: maximum deviation
=Integral Linearity Error: maximum deviation
=Differential Linearity Error: maximum deviation
=Offset Error: deviation between the first actual
=Gain Error: deviation between the last ideal
INJ(PIN)
in
±1.5
±1.5
±1.5
Typ
±2
±1
Section 5.3.12
Max
±2.5
±3
±2
±5
±3
(4)
does not
ai14395b
Unit
LSB
65/80