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ST7LITE0XY0 数据表(PDF) 107 Page - STMicroelectronics

部件名 ST7LITE0XY0
功能描述  8-bit microcontroller with single voltage Flash memory, data EEPROM, ADC, timers, SPI
PDF  124 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST7LITE0XY0 数据表(HTML) 107 Page - STMicroelectronics

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ADC CHARACTERISTICS (Cont’d)
Figure 84. ADC Accuracy Characteristics with Amplifier disabled
Figure 85. ADC Accuracy Characteristics with Amplifier enabled
Note: When the AMPSEL bit in the ADCDRL register is set, it is mandatory that fADC be less than or equal
to 2 MHz. (if fCPU=8MHz. then SPEED=0, SLOW=1).
EO
EG
1LSBIDEAL
1LSB
IDEAL
V
DDA
V
SSA
–
256
-----------------------------------------
=
Vin (LSBIDEAL)
(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
255
254
5
4
3
2
1
0
7
6
1
234567
253 254 255 256
(1)
(2)
ET
ED
EL
(3)
VDDA
VSSA
253
EO
EG
1LSBIDEAL
Vin (LSBIDEAL)
(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.
n
=Amplifier Offset
Digital Result ADCDR
n+5
n+4
n+3
n+2
n+1
0
n+7
n+6
1
234567
100 101 102 103
(1)
(2)
ET
ED
EL
(3)
250 mV
VSS



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