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STR750FV2 数据表(PDF) 75 Page - STMicroelectronics

部件名 STR750FV2
功能描述  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
PDF  84 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STR750FV2 数据表(HTML) 75 Page - STMicroelectronics

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STR750Fxx STR751Fxx STR752Fxx STR755Fxx
Electrical parameters
75/84
Figure 44.
ADC accuracy characteristics
Table 47.
ADC accuracy
ADC accuracy with fCK_SYS = 20 MHz, fADC=8 MHz, RAIN < 10 kΩ
This assumes that the ADC is calibrated(1)
1.
Calibration is needed once after each power-up.
Symbol
Parameter
Conditions
Typ
Max
Unit
|ET|
Total unadjusted error (2) (3)
2.
Refer to ADC accuracy vs. negative injection current on page 73
3.
ADC Accuracy vs. MCO (Main Clock Output): the ADC accuracy can be significantly degraded when
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.
VDDA_ADC=3.3 V
1
1.2
LSB
VDDA_ADC=5.0 V
1
1.2
|EO|
Offset error(2) (3)
VDDA_ADC=3.3 V
0.15
0.5
VDDA_ADC=5.0 V
0.15
0.5
EG
Gain Error (2) (3)
VDDA_ADC=3.3 V
-0.8
-0.2
VDDA_ADC=5.0 V
-0.8
-0.2
|ED|
Differential linearity error(2) (3)
VDDA_ADC=3.3 V
0.7
0.9
VDDA_ADC=5.0 V
0.7
0.9
|EL|
Integral linearity error (2) (3)
VDDA_ADC=3.3 V
0.6
0.8
VDDA_ADC=5.0 V
0.6
0.8
EO
EG
1LSBIDEAL
1LSB
IDEAL
V
DDA
V
SSA
–
1024
-----------------------------------------
=
Vin
(1) Example of an actual transfer curve
(2) The ideal transfer curve
(3) End point correlation line
ET=Total Unadjusted Error: maximum deviation
between the actual and the ideal transfer curves.
EO=Offset Error: deviation between the first actual
transition and the first ideal one.
EG=Gain Error: deviation between the last ideal
transition and the last actual one.
ED=Differential Linearity Error: maximum deviation
between actual steps and the ideal one.
EL=Integral Linearity Error: maximum deviation
between any actual transition and the end point
correlation line.
Digital Result ADCDR
1023
1022
1021
5
4
3
2
1
0
7
6
1
2
3
4567
1021 1022 1023 1024
(1)
(2)
ET
ED
EL
(3)
VDDA
VSSA



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