stm8af6166t STMicroelectronics, stm8af6166t Datasheet - Page 72

• Manufacturer Part Number: stm8af6166t
• Description: Automotive 8-bit Mcu, With Up To 128 Kbytes Flash, Eeprom, 10-bit Adc, Timers, Lin, Can, Usart, Spi, I2c, 3 V To 5.5 V
• Manufacturer: STMicroelectronics

Electrical characteristics
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Table 40.
1. ADC accuracy vs. negative injection current: Injecting negative current on any of the standard (non-robust)
Figure 24. ADC accuracy characteristics
Figure 25. Typical application with ADC
Symbol
1023
1022
1021
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
|E
|E
|E
|E
|E
7
6
5
4
3
2
1
O
G
D
T
L
V
0
|
|
|
|
|
SSA
V
1LSB
1
AIN
E
Total unadjusted error
Offset error
Gain error
Differential linearity error
Integral linearity error
O
ADC accuracy with f
INJ(PIN)
2
IDEAL
3
R
AIN
=
and ΣI
4
(1)
Parameter
V
---------------------------------------- -
(1)
DDA
5
C
1 LSB
1024
AIN
INJ(PIN)
–
E
6
V
T
AINx
IDEAL
SSA
E
7
L
(1)
in
(1)
(2)
Section 11.3.5
(1)
ADC
E
D
1021102210231024
= 2 MHz, R
(3)
V
DD
(1)
does not affect the ADC accuracy.
V
0.6V
V
0.6V
E
T
T
G
Conditions
AIN
V
< 10 kΩ R
DDA
I
±1µA
L
(1) Example of an actual transfer curve
(2) The ideal transfer curve
(3) End point correlation line
E
deviation between the actual and the ideal
transfer curves.
E
first actual transition and the first ideal one.
E
ideal transition and the last actual one.
E
deviation between actual steps and the
ideal one.
E
ation between any actual transition and the
end point correlation line.
T
O
G
D
L
= Total unadjusted error: maximum
= Integral linearity error: maximum devi-
= Gain error: deviation between the last
= Differential linearity error: maximum
= Offset error: deviation between the
STM8AF61xx, STM8AF51xx
conversion
10-bit A/D
AIN
, V
Typ
1.5
1.5
2
2
1
DDA
= 3.3 V
STM8
Max
2.5
C
4
2
2
2
ADC
Unit
LSB