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參數(shù)資料
| 型號(hào)： | MB89538C |
| 廠商： | Fujitsu Limited |
| 英文描述： | 8-bit Original Microcontroller |
| 中文描述： | 8位微控制器原件 |
| 文件頁(yè)數(shù)： | 51/65頁(yè) |
| 文件大?。?/td> | 503K |
| 代理商： | MB89538C |
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MB89530 Series
51
(5) Precautionary Information
Input Impedance of Analog Input Pins
The A/D converter 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.
About error
The smaller the absolute value |AVR - AVss| is, the greater the relative error becomes.
MB89537/537C/538/538C/F538L Analog Input Equivalent Circuit
C
=
49 pF
R
=
7.1 k
Closes 8 instruction cycles
after the start of A/D conversion
If analog input impedance is 10 k
or more, the use of a capacitor of
approximately 0.1
μ
F is recom-
mended.
Analog input pin
Sample-and-hold circuit
Compara-
tor
Analog channel selector
MB89P538 and MB89PV530 Analog Input Equivalent Circuit
C
=
64 pF
R
=
3 k
If analog input impedance is 10 k
or more, the use of a capacitor of
approximately 0.1
μ
F is recom-
mended.
Analog input pin
Sample-and-hold circuit
Compar-
ator
Closes 8 instruction cycles after
the start of A/D conversion
Analog channel selector
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB89538CP | 8-bit Original Microcontroller |
| MB89538CPF | 8-bit Original Microcontroller |
| MB89538CPFM | 8-bit Original Microcontroller |
| MB89538CPFV | 8-bit Original Microcontroller |
| MB89538P | 8-bit Original Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB89538CP | 制造商:FUJITSU 制造商全稱(chēng):Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller |
| MB89538CPF | 制造商:FUJITSU 制造商全稱(chēng):Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller |
| MB89538CPFM | 制造商:FUJITSU 制造商全稱(chēng):Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller |
| MB89538CPFV | 制造商:FUJITSU 制造商全稱(chēng):Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller |
| MB89538H | 制造商:FUJITSU 制造商全稱(chēng):Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS |
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