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參數(shù)資料
| 型號： | MB89PV640 |
| 廠商： | Fujitsu Limited |
| 英文描述： | 8-Bit Proprietary Microcontroller(8位專用微控制器) |
| 中文描述： | 8位微控制器專利（8位專用微控制器） |
| 文件頁數(shù)： | 44/58頁 |
| 文件大?。?/td> | 424K |
| 代理商： | MB89PV640 |
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44
MB89640 Series
(1) A/D Glossary
Resolution
Analog changes that are identifiable with the A/D converter.
When the number of bits is 8, analog voltage can be divided into 2
Linearity error (unit: LSB)
The deviation of the straight line connecting the zero transition point (“0000 0000”
full-scale transition point (“1111 1111”
Differential linearity error (unit: LSB)
The deviation of input voltage needed to change the output code by 1 LSB from the theoretical value
Total error (unit: LSB)
The difference between theoretical and actual conversion values
8
= 256.
“0000 0001”) with the
“1111 1110”) from actual conversion characteristics
(2) Precautions
Input impedance of the analog input pins
The A/D converter used for the MB89640 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.
V
OT
V
NT
V
(N + 1)T
V
FST
Digital output
(1 LSB
×
N + V
OT
)
0000
0000
0000
0001
1111
1111
1110
1111
1 LSB =
AVRH – AVRL
256
Linearity error =
Differential linearity error =
Analog input
Actual conversion value
Theoretical conversion value
Total error =
V
NT
– (1 LSB
×
N + V
OT
)
1 LSB
V
( N + 1 ) T
– V
NT
1 LSB
V
NT
– (1 LSB
×
N + 1 LSB)
– 1
1 LSB
Linearity error
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MB89PV640CF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89PV650A | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89PV650ACF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89PV670A | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89PV670ACF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
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