參數(shù)資料
型號(hào)： MB89P538PF-101
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 12.5 MHz, MICROCONTROLLER, PQFP64
封裝： 14 X 20 MM, 3.35 MM HEIGHT, 1 MM PITCH, PLASTIC, QFP-64
文件頁數(shù)： 48/69頁
文件大?。?/td> 1239K
代理商： MB89P538PF-101
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.
About error
The smaller the absolute value |AVR - AVss| is, the greater the relative error becomes.
MB89535A/537A/537AC/538A/538AC Analog Input Equivalent Circuit
C
= 45 pF
R
= 2.2 k
Comparator
If analog input impedance is
10 k
or more, the use of a
capacitor of approximately
0.1
F is recommended.
Analog input pin
Sample-and-hold circuit
Closes 8 instruction cycles
after the start of A/D conversion
Analog channel selector
MB89P538 and MB89PV530 Analog Input Equivalent Circuit
C
= 64 pF
R
= 3 k
Comparator
If analog input impedance is
10 k
or more, the use of a
capacitor of approximately
0.1
F is recommended.
Analog input pin
Sample-and-hold circuit
Closes 8 instruction cycles
after the start of A/D conversion
Analog channel selector
MB89F538 Analog Input Equivalent Circuit
C
= 30 pF
R
= 3.2 k
Comparator
Analog channel selector
Analog input pin
If analog input impedance is
10 k
or more, the use of a
capacitor of approximately
0.1
F is recommended.
Closes 8 instruction cycles
after the start of A/D conversion
Sample-and-hold circuit
相關(guān)PDF資料
PDF描述
MB89535APFV 8-BIT, MROM, 12.5 MHz, MICROCONTROLLER, PQFP64
MB89535AP 8-BIT, MROM, 12.5 MHz, MICROCONTROLLER, PDIP64
MB89P538-101PV 8-BIT, OTPROM, 12.5 MHz, MICROCONTROLLER, PBCC64
MB89538APFM 8-BIT, MROM, 12.5 MHz, MICROCONTROLLER, PQFP64
MB89P538P-101 8-BIT, OTPROM, 12.5 MHz, MICROCONTROLLER, PDIP64
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MB89P538PF-201 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
MB89P538PFM-101 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
MB89P538PFM-201 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS
MB89P558A 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller
MB89P558A-201PFT 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller
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