參數(shù)資料
型號(hào): MB89637RPF
廠商: Electronic Theatre Controls, Inc.
元件分類: 8位微控制器
英文描述: 8-bit Proprietary Microcontroller
中文描述: 8位微控制器專有
文件頁數(shù): 45/59頁
文件大小: 864K
代理商: MB89637RPF
MB89630R Series
45
7. Notes on Using A/D Converter
Input impedance of the analog input pins
The output impedance of the external circuit for the analog input must satisfy the followingconditions.
If the output impedance of the external circuit is too high, an analog voltage sampling time might beinsufficient
(sampling time = 6
μ
s at 10MHz oscillation.) Therefore, it is recommended to keep the output impedance of the
external circuit below 10 k
.
Error
The smaller the | AVR–AVss |, the greater the error would become relatively.
Analog input circuit model
Analog input
Note: The values mentioned here should be used as a guideline.
R
ON1
:
R
ON2
:
C
0
:
C
1
:
Converter
C
0
C
1
R
ON2
R
ON1
Approx. 1.5 k
Approx. 1.5 k
Approx. 60 pF
Approx. 4 pF
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