參數(shù)資料
型號(hào)： MB89558APFV-XXX
廠商： FUJITSU LTD
元件分類： 微控制器/微處理器
英文描述： 8-bit Proprietary Microcontroller
中文描述： 8-BIT, MROM, 12.5 MHz, MICROCONTROLLER, PQFP100
封裝： PLASTIC, LQFP-100
文件頁數(shù)： 42/51頁
文件大?。?/td> 654K
代理商： MB89558APFV-XXX
MB89550A Series
42
(11) Notes for A/D Conversion
Analog input pins and input impedance
The A/D converter in the MB89550A series incorporates a sample & hold circuit as shown below. When an A/
D conversion starts, the voltage at the analog input pin is captured by the sample & hold capacitor for a period
of 16 instruction cycles.
Accordingly, if the output impedance of the external circuit connected to the analog input is high, the analog
input voltage may not stabilize within the period of the analog input sampling time. Therefore, it is recommended
that the output impedance of the external circuit be sufficiently low (10 k
or less) .
Error
The relative error increases as
AVR
AV
SS
becomes smaller.
Equivalent circuit for MB89558A and MB89557A analog input
C
=
30 pF
R
=
3.2 k
Closed for approximately 16 instruction
cycles after start of A/D conversion
Analog input pin
Sample & hold circuit
Compara-
tor
Analog channel selector
Equivalent circuit for MB89P558A and MB89PV550A analog input
C
=
64 pF
R
=
1.4 k
Closed for approximately 16 instruction
cycles after start of A/D conversion
Analog input pin
Sample & hold circuit
Compara-
tor
Analog channel selector
相關(guān)PDF資料
PDF描述
MB89560A 8-bit Proprietary Microcontroller CMOS
MB89567A 8-bit Proprietary Microcontroller CMOS
MB89567AC 8-bit Proprietary Microcontroller CMOS
MB89567ACPF 8-bit Proprietary Microcontroller CMOS
MB89567ACPFM 8-bit Proprietary Microcontroller CMOS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MB89560A 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller CMOS
MB89560H 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller CMOS
MB89567A 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller CMOS
MB89567AC 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller CMOS
MB89567ACPF 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller CMOS
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