參數資料
型號: ST7FLIT19B
廠商: 意法半導體
英文描述: 8-Bit MCU With Single Voltage Flash Memory, Data EEPROM, ADC, 5 Timers, SPI(內部RC,PLL,ADC,ROP,ICP, IAP,SPI的8位MCU)
中文描述: 8位微控制器單電壓閃存存儲器,數據EEPROM,模數轉換器,5計時器和SPI(內部鋼筋,鎖相環(huán),藝發(fā)局,人事,電感,國際檢察官聯合會的SPI的8位微控制器)
文件頁數: 137/155頁
文件大?。?/td> 2968K
代理商: ST7FLIT19B
ST7LITE1xB
137/155
ADC CHARACTERISTICS
(Cont’d)
ADC Accuracy with V
DD
=5.0V
Notes:
1.
Data based on characterization results. Not tested in production.
2.
Injecting negative current on any of the analog input pins significantly reduces the accuracy of any conversion being
performed on any analog input.
Analog pins can be protected against negative injection by adding a Schottky diode (pin to ground). Injecting negative
current on digital input pins degrades ADC accuracy especially if performed on a pin close to the analog input pins.
Any positive injection current within the limits specified for I
INJ
(PIN) and
Σ
I
INJ
(PIN) in
Section 13.8
does not affect the
ADC accuracy.
3.
Data based on characterization results over the whole temperature range, monitored in production.
Figure 111. ADC Accuracy Characteristics with amplifier disabled
Symbol
E
T
E
O
E
G
E
D
E
L
Parameter
Conditions
Typ
4
3
0.5
1.5
1.5
Max
6
1)
5
1)
4
1)
3
2)
3
2)
Unit
Total unadjusted error
Offset error
Gain Error
Differential linearity error
3)
Integral linearity error
3)
f
CPU
=8MHz, f
ADC
=4MHz
LSB
E
O
E
G
1 LSB
IDEAL
1LSBIDEAL
VDD
VSS
1024
=
V
in
(LSB
IDEAL
)
(1) Example of an actual transfer curve
(2) The ideal transfer curve
(3) End point correlation line
E
=Total Unadjusted Error: maximum deviation
between the actual and the ideal transfer curves.
E
=Offset Error: deviation between the first actual
transition and the first ideal one.
E
=Gain Error: deviation between the last ideal
transition and the last actual one.
E
=Differential Linearity Error: maximum deviation
between actual steps and the ideal one.
E
=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
4
5
6
7
1021 10221023 1024
(1)
(2)
E
T
E
D
E
L
(3)
V
DD
V
SS
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