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參數(shù)資料
| 型號： | MB89537HCPFM |
| 廠商： | FUJITSU LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-bit Original Microcontroller CMOS |
| 中文描述： | 8-BIT, MROM, 12.5 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | PLASTIC, QFP-64 |
| 文件頁數(shù)： | 45/56頁 |
| 文件大?。?/td> | 456K |
| 代理商： | MB89537HCPFM |
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MB89530H Series
45
(4) Precautionary Information
Input Impedance of Analog Input Pins
The A/D converter of MB89530H 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.
MB89537H/537HC/538H/538HC Analog Input Equivalent Circuit
C
=
31 pF
R
=
3.2 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 recommended.
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
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 recommended.
Analog input pin
Sample-and-hold circuit
Compara-
tor
Analog channel selector
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB89537HCPFV | 8-bit Original Microcontroller CMOS |
| MB89537HP | 8-bit Original Microcontroller CMOS |
| MB89537HPF | 8-bit Original Microcontroller CMOS |
| MB89537HPFM | 8-bit Original Microcontroller CMOS |
| MB89537HPFV | 8-bit Original Microcontroller CMOS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB89537HCPFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS |
| MB89537HP | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS |
| MB89537HPF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS |
| MB89537HPFM | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS |
| MB89537HPFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS |
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