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参数资料
| 型号： | MB89538ACPFM |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 12.5 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | 12 X 12 MM, 1.70 MM HEIGHT, 0.65 MM PITCH, PLASTIC, LQFP-64 |
| 文件页数： | 48/69页 |
| 文件大小： | 1239K |
| 代理商： | MB89538ACPFM |
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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
相关PDF资料 |
PDF描述 |
|---|---|
| MB89F538PFM-201 | 8-BIT, FLASH, 12.5 MHz, MICROCONTROLLER, PQFP64 |
| MB89485P-SH | 8-BIT, MROM, 12.5 MHz, MICROCONTROLLER, PDIP64 |
| MB90372PMT-G-XXX | 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP144 |
| MB90F462P-SH | 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PDIP64 |
| MSM64152AL-XXX | 4-BIT, MROM, 0.075 MHz, MICROCONTROLLER, UUC57 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MB89538ACPFV | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series |
| MB89538AP | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series |
| MB89538APF | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series |
| MB89538APFM | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series |
| MB89538APFV | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series |
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