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參數(shù)資料
| 型號(hào)： | MB89530A |
| 廠商： | Fujitsu Limited |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 52/69頁 |
| 文件大?。?/td> | 1206K |
| 代理商： | MB89530A |
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MB89530A Series
52
(4) Precautionary Information
Input Impedance of Analog Input Pins
The A/D converter of MB89530A has a sample & hold circuit as shown below, which uses a sample-and-hold
capacitor to obtain the voltage at the analog input pin for 8 instruction cycles following the start of A/D conversion.
For this reason if the external circuits providing the analog input signal have high output impedance, the analog
input voltage may not stabilize within the analog input sampling time. It is therefore recommended that the output
impedance of external circuits be reduced to 10 k
or less.
MB89535A/537A/537AC/538A/538AC Analog Input Equivalent Circuit
About error
The smaller the absolute value |AVR - AVss| is, the greater the relative error becomes.
C
=
45 pF
R
=
2.2 k
Closes 8 instruction cycles
after the start of A/D conversion
Comp
a
r
a
tor
If analog input impedance is
10 k
or more, the use of a
capacitor of approximately
0.1
μ
F is recommended.
Analog input pin
Sample-and-hold circuit
Analog channel selector
MB89P538 and MB89PV530 Analog Input Equivalent Circuit
C
=
64 pF
R
=
3
k
Closes 8 instruction cycles
after the start of A/D conversion
Comp
a
r
a
tor
If analog input impedance is
10 k
or more, the use of a
capacitor of approximately
0.1
μ
F is recommended.
Analog input pin
Sample-and-hold circuit
Analog channel selector
MB89F538 Analog Input Equivalent Circuit
C
=
3
0 pF
R
=
3
.2 k
Closes 8 instruction cycles
after the start of A/D conversion
Comp
a
r
a
tor
Analog channel selector
Analog input pin
If analog input impedance is
10 k
or more, the use of a
capacitor of approximately
0.1
μ
F is recommended.
Sample-and-hold circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB89530 | 8-bit Original Microcontroller |
| MB89537 | 8-bit Original Microcontroller |
| MB89537C | 8-bit Original Microcontroller |
| MB89537CP | 8-bit Original Microcontroller |
| MB89537CPF | 8-bit Original Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB89535A | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series |
| MB89535AP | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series |
| MB89535APF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series |
| MB89535APFM | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series |
| MB89535APFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series |
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