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参数资料
| 型号： | MB89PV210CF |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, 12.5 MHz, MICROCONTROLLER, CQFP48 |
| 封装： | CERAMIC, MQFP-48 |
| 文件页数： | 35/46页 |
| 文件大小： | 473K |
| 代理商： | MB89PV210CF |
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MB89210 Series
40
(3) Precautionary Information of A/D conversion
Input Impedance of Analog Input Pins
The A/D converter 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 16 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 4 k
or less.
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.
About errors
The smaller the absolute value |VCC
VSS| is, the greater the relative error becomes.
Analog input equivalent circuit
RC
If analog input impedance is 4 k
or
more, the use of a capacitor of ap-
proximately 0.1
F is recommend-
ed.
Analog input pin
Sample-and-hold
circuit
Comparator
Closes 16 instruction cycles
after the start of A/D conversion
Analog channel selector
MB89215
R
= approx. 2.2 k, C = approx. 45 pF
MB89F217, MB89P215 R
= approx. 3.2 k, C = approx. 30 pF
相关PDF资料 |
PDF描述 |
|---|---|
| MB89F217PFM | 8-BIT, FLASH, 12.5 MHz, MICROCONTROLLER, PQFP48 |
| MB89215PFM | 8-BIT, MROM, 12.5 MHz, MICROCONTROLLER, PQFP48 |
| MB89P215PFV | 8-BIT, OTPROM, 12.5 MHz, MICROCONTROLLER, PDSO30 |
| MB89351PSH | SCSI BUS CONTROLLER, PDIP64 |
| MB89485LP-SH | 8-BIT, MROM, 12.5 MHz, MICROCONTROLLER, PDIP64 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MB89PV470 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89PV470-101CF | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89PV470-201CF | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89PV480 | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89PV480-101CF | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
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