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参数资料
| 型号： | MB89P485L-104PMC |
| 厂商： | FUJITSU LTD |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | MICROCONTROLLER, PQFP64 |
| 封装： | 12 X 12 MM, 1.70 MM HEIGHT, 0.65 MM PITCH, PLASTIC, LQFP-64 |
| 文件页数： | 37/56页 |
| 文件大小： | 1476K |
| 代理商： | MB89P485L-104PMC |
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MB89480 Series
42
DS07-12559-2E
(3) Notes on Using A/D Converter
Input impedance of the analog input pins
The A/D converter used for the MB89480 series contains a sample and hold circuit as illustrated below to
fetch analog input voltage into the sample and hold capacitor for 16 instruction cycles after activation A/D
conversion.
For this reason, if the output impedance of the external circuit for the analog input is high, analog input
voltage might not stabilize within the analog input sampling period. Therefore, it is recommended to keep
the output impedance of the external circuit low
.
Note that if the impedance cannot be kept low, it is recommended to connect an external capacitor of about
0.1
F for the analog input pin.
MB89485
MB89PV480
MB89485L
MB89P485
MB89P485L
R: analog input equivalent resistance
2.2 k
2.8 k
2.6 k
7.1 k
C: analog input equivalent capacitance
45 pF
46 pF
28 pF
48.3 pF
Analog input pin
Sample and hold circuit
Comparator
R
C
Analog channel selector
Close for 16 instruction cycles after
activating A/D conversion.
If the analog input
impedance is higher
than 10 k
, it is
recommended to
connect an external
capacitor of approx.
0.1
F.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MB89P485L-104P-SH | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89P538 | 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 |
| MB89P538-101 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS |
| MB89P538-101P | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller |
| MB89P538-101PF | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Original Microcontroller CMOS |
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