參數(shù)資料
    型號: AD8138ARMZ-REEL
    廠商: ANALOG DEVICES INC
    元件分類: 通用總線功能
    英文描述: Low Distortion Differential ADC Driver
    中文描述: LINE DRIVER, PDSO8
    封裝: LEAD FREE, MO-187AA, MSOP-8
    文件頁數(shù): 16/24頁
    文件大小: 318K
    代理商: AD8138ARMZ-REEL
    AD8138
    OPERATIONAL DESCRIPTION
    DEFINITION OF TERMS
    Rev. F | Page 16 of 24
    AD8138
    +IN
    –IN
    +OUT
    –OUT
    C
    F
    C
    F
    R
    F
    R
    F
    +D
    IN
    –D
    IN
    V
    OCM
    R
    G
    R
    G
    V
    OUT, dm
    R
    L, dm
    0
    Figure 42. Circuit Definitions
    Differential voltage refers to the difference between two node
    voltages. For example, the output differential voltage (or
    equivalently output differential-mode voltage) is defined as
    V
    OUT, dm
    = (
    V
    +OUT
    V
    OUT
    )
    where
    V
    +OUT
    and
    V
    OUT
    refer to the voltages at the +OUT and
    OUT terminals with respect to a common reference.
    Common-mode voltage refers to the average of two node
    voltages. The output common-mode voltage is defined as
    V
    OUT, cm
    = (
    V
    +OUT
    +
    V
    OUT
    )/2
    Balance is a measure of how well differential signals are
    matched in amplitude and exactly 180° apart in phase. Balance
    is most easily determined by placing a well-matched resistor
    divider between the differential voltage nodes and comparing
    the magnitude of the signal at the divider’s midpoint with the
    magnitude of the differential signal (see Figure 41). By this
    definition, output balance is the magnitude of the output
    common-mode voltage divided by the magnitude of the output
    differential mode voltage:
    dm
    OUT
    V
    cm
    OUT
    V
    Error
    Balance
    Output
    ,
    ,
    =
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