Datasheet

Electrical characteristics STM8S207xx, STM8S208xx
84/103 Doc ID 14733 Rev 12
Figure 41. ADC accuracy characteristics
1. Example of an actual transfer curve.
2. The ideal transfer curve
3. End point correlation line
E
T
= Total unadjusted error: maximum deviation between the actual and the ideal transfer curves.
E
O
= Offset error: deviation between the first actual transition and the first ideal one.
E
G
= Gain error: deviation between the last ideal transition and the last actual one.
E
D
= Differential linearity error: maximum deviation between actual steps and the ideal one.
E
L
= Integral linearity error: maximum deviation between any actual transition and the end point correlation
line.
Figure 42. Typical application with ADC
E
O
E
G
1LSB
IDEAL
1LSB
IDEAL
V
DDA
V
SSA
–
1024
-----------------------------------------=
1023
1022
1021
5
4
3
2
1
0
7
6
1234567
1021102210231024
(1)
(2)
E
T
E
D
E
L
(3)
V
DDA
V
SSA
AINx
STM8
V
DD
I
L
±1µA
V
T
0.6V
V
T
0.6V
C
ADC
V
AIN
R
AIN
10-bit A/D
conversion
C
AIN