參數(shù)資料
型號(hào)： MB90F952MBSPF
廠商： FUJITSU LTD
元件分類(lèi)： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 32 MHz, MICROCONTROLLER, PQFP100
封裝： 14 X 20 MM, 3.35 MM HEIGHT, 0.65 MM PITCH, PLASTIC, QFP-100
文件頁(yè)數(shù)： 74/84頁(yè)
文件大?。?/td> 2562K
代理商： MB90F952MBSPF
MB90950 Series
76
DS07-13752-1E
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. 4.2 k
or lower (4.5 V ≤ AVCC ≤ 5.5 V,
sampling period
= 0.4 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.
C
Comparator
Analog input
R
MB90F952
4.5 V
≤ AVCC ≤ 5.5 V : R := 4.1 k, C := 8.5 pF
3.0 V
≤ AVCC < 4.5 V : R := 10.33 k, C := 8.5 pF
MB90V340F
4.5 V
≤ AVCC ≤ 5.5 V : R := 2.52 k, C := 10.7 pF
4.0 V
≤ AVCC < 4.5 V : R := 13.6 k, C := 10.7 pF
Analog input circuit model
Note : Use the values in the figure only as a guideline.
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