參數(shù)資料
型號: MB90F362TES
廠商: Fujitsu Limited
英文描述: 16-bit Proprietary Microcontroller
中文描述: 16位微控制器專有
文件頁數(shù): 52/60頁
文件大小: 676K
代理商: MB90F362TES
MB90360E Series
52
About the external impedance of analog input and its sampling time
A/D converter with sample and hold circuit. If the external impedance is too high to keep sufficient sampling
time, the analog voltage changed to the internal sample and hold capacitor is insufficient, adversely affecting A/
D conversion precision. Therefore, to satisfy the A/D conversion precision standard, consider the relationship
between the external impedance and minimum sampling time and either adjust the resistor value and operating
frequency or decrease the external impedance so that the sampling time is longer than the minimum value. And,
if the sampling time cannot be sufficient, connect a capacitor of about 0.1
μ
F to the analog input pin.
R
C
Analog input equivalent circuit model
Analog input
During sampling : ON
Comparator
MB90F362E/TE/ES/TES, MB90F367E/TE/ES/TES
MB90362E/TE/ES/TES, MB90367E/TE/ES/TES,
MB90V340E-101/102/103/104
R
C
4.5 V
AV
CC
5.5 V
4.0 V
AV
CC
< 4.5 V
2.0 k
(Max)
8.2 k
(Max)
16.0 pF (Max)
16.0 pF (Max)
R
C
4.5 V
AV
CC
5.5 V
4.0 V
AV
CC
< 4.5 V
2.0 k
(Max)
8.2 k
(Max)
14.4 pF (Max)
14.4 pF (Max)
Note : The values are reference values.
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