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參數(shù)資料
| 型號： | MB90822PFV |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 10-Bit Buffers/Drivers With 3-State Outputs 24-CFP -55 to 125 |
| 中文描述： | 16位微控制器專有 |
| 文件頁數(shù)： | 92/98頁 |
| 文件大?。?/td> | 1415K |
| 代理商： | MB90822PFV |
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MB90820 Series
92
7.
About the external impedance of the 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 charged to the internal sample and hold capacitor is insufficient, adversely affecting
A/D conversion precision.
Notes on Using A/D Converter
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.
If the sampling time cannot be sufficient, connect a capacitor of about 0.1
μ
F to the analog input pin.
About the error
The accuracy gets worse as
|
AVR
AV
SS
|
becomes smaller.
R
C
R
C
MB90822
MB90F822
2.0 k
(Max)
2.0 k
(Max)
14.4 pF (Max)
16.0 pF (Max)
Analog input circuit model
Analog input
During sampling : ON
Comparator
Note : The values are reference values.
MB90F822
MB90822
0
5
10
15
20
25
30
35
0
10
20
30
40
50
60
70
80
90
100
MB90F822
MB90822
0
1
2
3
4
5
6
7
8
0
2
4
6
8
10
12
14
16
18
20
(External impedance
=
0 k
to 100 k
)
(External impedance
=
0 k
to 20 k
)
E
]
Minimum sampling time [
μ
s]
E
]
Minimum sampling time [
μ
s]
The relationship between the external impedance and minimum sampling time
相關PDF資料 |
PDF描述 |
|---|---|
| MB90822 | 16-bit Proprietary Microcontroller |
| MB90822PF | 16-bit Proprietary Microcontroller |
| MB90822PFM | 16-bit Proprietary Microcontroller |
| MBI5169 | 8 bit CONSTANT CURRENT LED SINK DRIVER WITH ERROR DETECTION |
| MBI5169CD | 8 bit CONSTANT CURRENT LED SINK DRIVER WITH ERROR DETECTION |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MB90823 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90823B | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Microcontroller |
| MB90823BPF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Microcontroller |
| MB90823BPMC | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Microcontroller |
| MB90823BPMC1 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Microcontroller |
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