參數(shù)資料
型號(hào): MB90F349ES
廠商: Fujitsu Limited
英文描述: 16-bit Microcontroller
中文描述: 16位微控制器
文件頁(yè)數(shù): 68/84頁(yè)
文件大?。?/td> 1098K
代理商: MB90F349ES
MB90340E Series
68
7.
Notes on A/D Converter Section
Use the device with external circuits of the following output impedance for analog inputs :
Recommended output impedance of external circuits are : Approx. 1.5 k
or lower (4.0 V
AV
CC
5.5 V,
sampling period
=
0.5
μ
s)
If an external capacitor is used, in consideration of the capacitive voltage dividing effect between the external
capacitor and the internal on-chip capacitor, it is recommended that the capacitance of the external capacitor
be several thousand times greater than the capacitance of the internal capacitor.
If the output impedance of the external circuit is too high, a sampling period for an analog voltage may be
insufficient.
Analog input circuit model
C
Comparator
Analog input
R
4.5 V
AV
CC
5.5 V : R : 2.52 k
, C : 10.7 pF
4.0 V
AV
CC
< 4.5 V : R : 13.6 k
, C : 10.7 pF
Note : Use the values in the figure only as a guideline.
相關(guān)PDF資料
PDF描述
MB90F342CEPF 16-bit Microcontroller
MB90F342CEPFV 16-bit Microcontroller
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