參數(shù)資料
型號(hào)： MB89945
廠商： Fujitsu Limited
英文描述： 8-bit Proprietary Microcontrolle
中文描述： 8位專(zhuān)有Microcontrolle
文件頁(yè)數(shù)： 33/38頁(yè)
文件大?。?/td> 197K
代理商： MB89945
MB89940 Series
33
7.
Notes on Using A/D Converter
Input impedance of the analog input pins
The A/D converter used for the MB89940 series contains a sample hold circuit as illustrated below to fetch
analog input voltage into the sample hold capacitor for eight instruction cycles after activating A/D conversion.
For this reason, if the output impedance of the external circuit for the analog input is high, analog input voltage
might not stabilize within the analog input sampling period. Therefore, it is recommended to keep the output
impedance of the external circuit low (below 10 k
).
Note that if the impedance cannot be kept low, it is recommended to connect an external capacitor of about
0.1
μ
F for the analog input pin.
Error
The smaller the | AV
CC
– AV
SS
|, the greater the error would become relatively.
Analog Input Equivalent Circuit
Sample hold circuit
C .
Analog channel selector
Close for 8 instruction cycles after activating
A/D conversion.
If the analog input
impedance is higher
than 10 k
, it is
recommended to
connect an external
capacitor of approx.
0.1
μ
F.
Analog input pin
Comparator
R .
相關(guān)PDF資料
PDF描述
MB89945PF 8-bit Proprietary Microcontrolle
MB89943 Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 20-LCCC -55 to 125
MB89943PF Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 16-CDIP -55 to 125
MB8994x Quadruple 2-Line To 1-Line Data Selectors/Multiplexers 16-CFP -55 to 125
MB89PV940CF 8-bit Proprietary Microcontroller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MB89945PF 制造商:FUJITSU 制造商全稱(chēng):Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontrolle
MB8994X 制造商:FUJITSU 制造商全稱(chēng):Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller
MB89951 制造商:FUJITSU 制造商全稱(chēng):Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller
MB89951PFM 制造商:FUJITSU 制造商全稱(chēng):Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller
MB89953 制造商:FUJITSU 制造商全稱(chēng):Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller
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