STM8S105C4B3 STMICROELECTRONICS [STMicroelectronics], STM8S105C4B3 Datasheet - Page 101

• Manufacturer Part Number: STM8S105C4B3
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STM8S105xx
1. Example of an actual transfer curve.
2. The ideal transfer curve
3. End point correlation line
Symbol
|E
(1)
in production.
(2)
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
pin characteristics
L
E
curves.
E
E
E
one.
Data based on characterisation results for LQFP80 device with V
ADC accuracy vs. negative injection current: Injecting negative current on any of the
|
T
O
G
D
= Total unadjusted error: maximum deviation between the actual and the ideal transfer
= Differential linearity error: maximum deviation between actual steps and the ideal
= Offset error: deviation between the first actual transition and the first ideal one.
= Gain error: deviation between the last ideal transition and the last actual one.
Parameter
Integral linearity error
does not affect the ADC accuracy.
Figure 45: ADC accuracy characteristics
DocID14771 Rev 9
(2)
Conditions
f
f
f
ADC
ADC
ADC
= 4 MHz
= 2 MHz
= 4 MHz
INJ(PIN)
Electrical characteristics
Typ
0.7
0.6
0.6
and ΣI
REF+
/V
INJ(PIN)
Max
1
1.5
1.5
REF-
(1)
, not tested
in
I/O port
Unit
101/127