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參數(shù)資料
| 型號(hào)： | MB95F118AWPMC |
| 廠商： | FUJITSU LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP52 |
| 封裝： | 10 X 10 MM, 1.70 MM HEIGHT, 0.65 MM PITCH, PLASTIC, LQFP-52 |
| 文件頁(yè)數(shù)： | 52/71頁(yè) |
| 文件大?。?/td> | 814K |
| 代理商： | MB95F118AWPMC |
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MB95110A Series
56
(2) Notes on Using A/D Converter
About the 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 resistor 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.
About errors
As |AVCC
AVSS| becomes smaller, values of relative errors grow larger.
R
C
During sampling
: ON
Analog input pin
Comparator
Note : The values are reference values.
Analog input equivalent circuit
RC
2.7 V
≤ AVcc ≤ 3.6 V
1.7 k
(Max)
14.5 pF (Max)
1.8 V
≤ AVcc < 2.7 V
84 k
(Max)
25.2 pF (Max)
0
5
10
15
20
25
30
35
40
0
10
20
30
40
50
60
70
80
90
100
01
23
4
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)
Minimum sampling time [
s]
External
impedance
[k
]
Minimum sampling time [
s]
External
impedance
[k
]
The relationship between external impedance and minimum sampling time
AVcc
≥ 2.7 V
AVcc
≥ 1.8 V
AVcc
≥ 2.7 V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB95F118BS | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontrollers |
| MB95F118BSPMC | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontrollers |
| MB95F118BSPMT | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontrollers |
| MB95F118BSPV2 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontrollers |
| MB95F118BW | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontrollers |
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