str755fvx STMicroelectronics, str755fvx Datasheet - Page 67

• Manufacturer Part Number: str755fvx
• Description: Arm7tdmi-s, 32-bit Mcu With Flash, Smi, 3 Std 16-bit Timers Pwm Timer, Fast 10-bit Adc, I2c, Uart, Ssp, Usb And Can
• Manufacturer: STMicroelectronics

STR750F
Table 42.
1. Calibration is needed once after each power-up.
2. Refer to
3. ADC Accuracy vs. MCO (Main Clock Output): the ADC accuracy can be significantly degraded when
Figure 32. ADC accuracy characteristics
ADC Accuracy with f
This assumes that the ADC is calibrated
Symbol
activating the MCO on pin P0.01 while converting an analog channel (especially those which are close to
the MCO pin). To avoid this, when an ADC conversion is launched, it is strongly recommended to disable
the MCO.
|E
|E
|E
|E
E
O
G
T
D
L
1023
1022
1021
|
|
|
|
7
6
5
4
3
2
1
0
V
ADC Accuracy vs. Negative Injection Current on page 65
SSA
Total unadjusted error
Offset error
Gain Error
Differential linearity error
Integral linearity error
Digital Result ADCDR
1LSB
ADC accuracy
1
E
O
IDEAL
2
3
CK_SYS
=
(2) (3)
(2) (3)
V
---------------------------------------- -
DDA
4
Parameter
1024
–
5
1 LSB
= 20 MHz, f
V
SSA
E
6
T
IDEAL
(2) (3)
(2) (3)
E
7
L
(2) (3)
(2)
ADC
E
D
(1)
1021 1022 1023 1024
=8 MHz, R
(3)
(1)
V
V
V
V
V
V
V
V
V
V
DDA_ADC
DDA_ADC
DDA_ADC
DDA_ADC
DDA_ADC
E
DDA_ADC
DDA_ADC
DDA_ADC
DDA_ADC
DDA_ADC
G
Conditions
V
AIN
DDA
< 10 kΩ
(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.
=3.3 V
=3.3 V
=3.3 V
=3.3 V
=3.3 V
T
O
G
D
L
=5.0 V
=5.0 V
=5.0 V
=5.0 V
=5.0 V
=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
Vin
0.15
0.15
Typ
-0.8
-0.8
0.7
0.7
0.6
0.6
1
Electrical parameters
1
Max
-0.2
-0.2
1.2
0.5
0.5
0.9
0.8
1.2
0.9
0.8
Unit
LSB
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