ST72324 STMICROELECTRONICS [STMicroelectronics], ST72324 Datasheet - Page 145

• Manufacturer Part Number: ST72324
• Description: 5V RANGE 8-BIT MCU WITH 8 TO 32K FLASH, 10-BIT ADC, 4 TIMERS, SPI, SCI INTERFACE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

10-BIT ADC CHARACTERISTICS (Cont’d)
12.13.3 ADC Accuracy
Conditions: V
Notes:
1. ADC Accuracy vs. Negative Injection Current: Injecting negative current may reduce the accuracy of the conversion
being performed on another analog input.
Any positive injection current within the limits specified for I
accuracy.
2. Data based on characterization results, monitored in production to guarantee 99.73% within ± max value from -40°C
to 125°C (± 3σ distribution limits).
Figure 87. ADC Accuracy Characteristics
Symbol
1023
1022
1021
|E
|E
|E
|E
|E
7
6
5
4
3
2
1
O
G
D
T
L
0
V
|
|
|
|
|
SSA
Digital Result ADCDR
1LSB
Total unadjusted error
Offset error
Gain Error
Differential linearity error
1)
Integral linearity error
1
E
O
IDEAL
DD
2
Parameter
=5V
1)
3
=
1)
V
--------------------------------------------
1)
AREF
4
1024
5
–
1 LSB
1)
V
1)
SSA
E
6
T
IDEAL
CPU in run mode @ f
CPU in run mode @ f
E
7
L
(2)
E
D
1021 1022 1023 1024
(3)
Conditions
INJ(PIN)
(1)
ADC
ADC
E
2 MHz.
2 MHz.
G
V
AREF
and ΣI
(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.
INJ(PIN)
T
O
G
D
L
=Total Unadjusted Error: maximum deviation
=Integral Linearity Error: maximum deviation
=Offset Error: deviation between the first actual
=Gain Error: deviation between the last ideal
=Differential Linearity Error: maximum deviation
V
in
(LSB
in
Section 12.9
IDEAL
)
Flash Devices
Typ
0.5
1.5
1.5
4
3
does not affect the ADC
Max
4.5
4.5
4.5
6
5
2)
ST72324
145/163
Unit
LSB
1