Datasheet

changes of the analog input voltage have no effect on the conversion result. Values for the
sample clock t
S
depend on programming.
Table 46: ADC accuracy with R
AIN
< 10 kΩ , V
DDA
= 5 V
UnitMax
(1)
TypConditionsParameterSymbol
LSB2.51.0f
ADC
= 2 MHzTotal unadjusted error
(2)
|E
T
|
3.01.4f
ADC
= 4 MHz
3.51.6f
ADC
= 6 MHz
2.00.6f
ADC
= 2 MHzOffset error
(2)
|E
O
|
2.51.1f
ADC
= 4 MHz
2.51.2f
ADC
= 6 MHz
2.00.2f
ADC
= 2 MHzGain error
(2)
|E
G
|
2.50.6f
ADC
= 4 MHz
2.50.8f
ADC
= 6 MHz
1.50.7f
ADC
= 2 MHzDifferential linearity error
(2)
|E
D
|
1.50.7f
ADC
= 4 MHz
1.50.8f
ADC
= 6 MHz
1.50.6f
ADC
= 2 MHzIntegral linearity error
(2)
|E
L
|
1.50.6f
ADC
= 4 MHz
1.50.6f
ADC
= 6 MHz
(1)
Data based on characterisation results, not tested in production.
(2)
ADC accuracy vs. negative injection current: Injecting negative current on any of the
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.
97/124DocID14771 Rev 12
Electrical characteristicsSTM8S105xx