參數(shù)資料
型號(hào)： MB89538ACPF
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, F-2MC-8L MB89530A Series
中文描述： 8-BIT, MROM, 12.5 MHz, MICROCONTROLLER, PDSO64
封裝： 14 X 20 MM, 3.35 MM HEIGHT, 1 MM PITCH, PLASTIC, QFP-64
文件頁(yè)數(shù)： 50/62頁(yè)
文件大?。?/td> 488K
代理商： MB89538ACPF
MB89530A Series
50
(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
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
MB89F538 Analog Input Equivalent Circuit
C
=
30 pF
R
=
3.2 k
Closes 8 instruction cycles
after the start of A/D conversion
Analog channel selector
Compara-
tor
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
MB89538ACPFM 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series
MB89538ACPFV 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series
MB89538AP 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series
MB89538APF 37MM/EMI/FLEX/SHIELD SLEEVE/50 METER
MB89538APFM 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MB89538ACPFM 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
MB89538ACPFV 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
MB89538AP 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
MB89538APF 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
MB89538APFM 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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