ST7232AK2-Auto STMicroelectronics, ST7232AK2-Auto Datasheet - Page 181

• Manufacturer Part Number: ST7232AK2-Auto
• Description: 8-bit MCU for automotive, 16 Kbyte Flash, 10-bit ADC, 4 timers, SPI, SCI
• Manufacturer: STMicroelectronics

Specifications of ST7232AK2-Auto

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators and bypass for external clock
• Four Power Saving Modes: halt, active halt, wait and slow
• Main Clock Controller With: real time base, beep and clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, PWM and pulse generator modes

ST7232Axx-Auto
12.12.3
ADC accuracy
Table 94.
1. Data based on characterization results, monitored in production to guarantee 99.73% within ± max value
2. ADC accuracy vs. negative injection current: Injecting negative current may reduce the accuracy of the
Figure 85. ADC accuracy characteristics
1. Legend:
Symbol
|E
|E
|E
|E
|E
from -40°C to 125°C (± 3σ distribution limits).
conversion being performed on another analog input. Any positive injection current within the limits
specified for I
E
E
E
E
E
line
1023
1022
1021
Digital result ADCDR
T
O
G
D
L
O
G
T
D
L
= Integral linearity error: maximum deviation between any actual transition and the end point correlation
= Total unadjusted error: maximum deviation between the actual and the ideal transfer curves
= Offset error: deviation between the first actual transition and the first ideal one
= Differential linearity error: maximum deviation between actual steps and the ideal one
|
|
= Gain error: deviation between the last ideal transition and the last actual one
|
|
|
7
6
5
4
3
2
1
0
V
SSA
Total unadjusted error
Offset error
Gain error
Differential linearity error
Integral linearity error
1LSB
1
E
ADC accuracy with V
O
INJ(PIN)
IDEAL
2
Parameter
3
(2)
and ΣI
(2)
=
V
--------------------------------------------
4
AREF
INJ(PIN)
5
1024
1 LSB
–
E
V
(2)
6
(2)
T
in
SSA
IDEAL
(2)
Section 12.8
E
7
L
(2)
DD
CPU in run mode @ f
= 5.0V
E
D
10211022 1023 1024
(3)
does not affect the ADC accuracy.
Conditions
(1)
E
G
V
AREF
ADC
(1) = Example of an actual transfer curve
(2) = Ideal transfer curve
(3) = End point correlation line
= 2 MHz.
V
in
(LSB
Electrical characteristics
IDEAL
)
Typ
0.5
1.5
1.5
4
3
Max
4.5
4.5
4.5
6
5
(1)
181/201
Unit
LSB