參數(shù)資料
型號(hào)： MB95F134MBS
廠商： Fujitsu Limited
元件分類： 8位微控制器
英文描述： 8-BIT SINGLE CHIP MICROCONTROLLERS
中文描述： 8位單晶片微控制器
文件頁(yè)數(shù)： 55/64頁(yè)
文件大?。?/td> 795K
代理商： MB95F134MBS
MB95130MB Series
55
(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
μ
F to the analog input pin.
Errors
As |AV
CC
AV
SS
| becomes smaller, values of relative errors grow larger.
R
C
Analog input
Note : The values are reference values.
Analog input equivalent circuit
R
C
4.5 V
≤
AV
CC
≤
5.5 V
4.0 V
≤
AV
CC
< 4.5 V
2.0 k
(Max)
8.2 k
(Max)
16 pF (Max)
16 pF (Max)
Comparator
During sampling : ON
20
18
16
14
12
10
8
6
4
2
0
0
2
1
3
4
100
90
80
70
60
50
40
30
20
10
0
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 [
μ
s]
E
]
Minimum sampling time [
μ
s]
E
]
AV
CC
≥
4.0 V
The relationship between external impedance and minimum sampling time
AV
CC
≥
4.5 V
AV
CC
≥
4.5 V
AV
CC
≥
4.0 V
相關(guān)PDF資料
PDF描述
MB95F133JBS 8-BIT SINGLE CHIP MICROCONTROLLERS
MB95F133JBW 8-BIT SINGLE CHIP MICROCONTROLLERS
MB95F133MBS 8-BIT SINGLE CHIP MICROCONTROLLERS
MB95F133MBW 8-BIT SINGLE CHIP MICROCONTROLLERS
MB95F133NBS 8-BIT SINGLE CHIP MICROCONTROLLERS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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MB95F134MBSPFV 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Microcontrollers
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MB95F134MBWPF 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Microcontrollers
MB95F134MBWPFV 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Microcontrollers
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