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參數(shù)資料
| 型號： | MB95F136MSPFV |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 16.25 MHz, MICROCONTROLLER, PDSO28 |
| 封裝： | 8.60 X 17.75 MM, 2.80 MM HEIGHT, 1.27 MM PITCH, PLASTIC, SOP-28 |
| 文件頁數(shù)： | 50/63頁 |
| 文件大?。?/td> | 522K |
| 代理商： | MB95F136MSPFV |
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MB95130M Series
54
(2) Notes on Using A/D Converter
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 charged 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 register value and operating
frequency or decrease the external impedance so that the sampling time is longer than the minimum value.
Also, if the sampling time cannot be sufficient, connect a capacitor of about 0.1
F to the analog input pin.
Errors
As |AVCC
AVSS| becomes smaller, values of relative errors grow larger.
R
C
Analog input
Note : The values are reference values.
Analog input equivalent circuit
RC
4.5 V
≤ AVCC ≤ 5.5 V
2.0 k
(Max)
16 pF (Max)
4.0 V
≤ AVCC < 4.5 V
8.2 k
(Max)
16 pF (Max)
Comparator
During sampling : ON
20
18
16
14
12
10
8
6
4
2
0
02
13
4
100
90
80
70
60
50
40
30
20
10
0
2
4
6
8
10
12
14
(External impedance
= at 0 k to 100 k)
(External impedance
= at 0 k to 20 k)
Minimum sampling time [
s]
External
impedance
[k
]
Minimum sampling time [
s]
External
impedance
[k
]
AVCC
≥ 4.0 V
The relationship between external impedance and minimum sampling time
AVCC
≥ 4.5 V
AVCC
≥ 4.5 V
AVCC
≥ 4.0 V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB95F136MW | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontrollers |
| MB95F136MWPF-GE1 | 制造商:Fujitsu 功能描述:8 F2MC 16.25MHz 28SOP 32KB 1KB 18ch/20ch Tube |
| MB95F136NBS | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Microcontrollers |
| MB95F136NBSPF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Microcontrollers |
| MB95F136NBSPF-GE1 | 制造商:FUJITSU 功能描述:8-bit Microcontrollers |
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