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參數(shù)資料
| 型號(hào)： | MB89663R |
| 廠商： | Fujitsu Limited |
| 英文描述： | Quadruple Bus Buffer Gates With 3-State Outputs 20-LCCC -55 to 125 |
| 中文描述： | 8位微控制器專有 |
| 文件頁數(shù)： | 34/47頁 |
| 文件大?。?/td> | 649K |
| 代理商： | MB89663R |
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34
MB89660R Series
7. A/D Converter
Input impedance of analog input pins
The A/D converter used for the MB89660R series contains a sample hold circuit as illustrated below to fetch
analog input voltage into the sample hold capacitor for eight instruction cycles after starting 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 2 k
).
Note that if the impedance cannot be kept low, it is recommended to connect an external capacitor of approx.
0.1
μ
F for the analog input pin.
Error
The smaller the | AVR – AV
SS
|, the greater the error would become relatively.
V
OT
V
NT
V
( N+I )T
V
FST
Digital output
(1 LSB
×
N + V
OT
)
0000
0000
0000
0001
1111
1111
1110
1111
1 LSB =
AVR
256
Linearity error =
V
NT
– (1 LSB
×
N + V
OT
)
1 LSB
Differential linearity error =
V
( N + 1 ) T
– V
NT
1 LSB
Analog input
Actual conversion value
Theoretical conversion value
– 1
Total error =
1 LSB
V
NT
– (1 LSB
×
N + 1 LSB)
Linearity error
Closes for 8 instruction cycles
after starting A/D conversion.
Sample hold circuit
C
33 pF
Analog channel selector
Analog input pin
R
6 k
Comparator
If the output impedance of
the external circuit is high, it
is recommended to connect
an external capacitor of
approx. 0.1
μ
F.
.
Analog Input Equivalent Circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB89663RP-SH | 8-bit Proprietary Microcontroller |
| MB89663RPF | 8-bit Proprietary Microcontroller |
| MB89665R | Quadruple Bus Buffer Gates With 3-State Outputs 14-CDIP -55 to 125 |
| MB89665RP-SH | Quadruple Bus Buffer Gates With 3-State Outputs 14-CFP -55 to 125 |
| MB89665RPF | 3-Line To 8-Line Decoders/Demultiplexers 20-LCCC -55 to 125 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB89663RPF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89663RP-SH | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89665 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89665PF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89665P-SH | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
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