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  1. 參數(shù)資料
    型號: MB90348ESPFV
    元件分類: 微控制器/微處理器
    英文描述: MICROCONTROLLER, PQFP100
    封裝: 14 X 14 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LQFP-100
    文件頁數(shù): 65/84頁
    文件大小: 1142K
    代理商: MB90348ESPFV
    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
    Ω or lower (4.0 V ≤ AVCC ≤ 5.5 V,
    sampling period
    = 0.5 μs)
    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
    4.5 V
    ≤ AVCC ≤ 5.5 V : R := 2.52 kΩ, C := 10.7 pF
    4.0 V
    ≤ AVCC < 4.5 V : R := 13.6 kΩ, C := 10.7 pF
    Analog input circuit model
    Note : Use the values in the figure only as a guideline.
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