• 參數(shù)資料
    型號: THS7002CPWP
    廠商: TEXAS INSTRUMENTS INC
    元件分類: 模擬信號調(diào)理
    英文描述: SPECIALTY ANALOG CIRCUIT, PDSO28
    封裝: GREEN, PLASTIC, HTSSOP-28
    文件頁數(shù): 15/41頁
    文件大?。?/td> 1203K
    代理商: THS7002CPWP
    THS7001, THS7002
    70MHz PROGRAMMABLEGAIN AMPLIFIERS
    SLOS214C OCTOBER 1998 REVISED MARCH 2007
    22
    POST OFFICE BOX 655303
    DALLAS, TEXAS 75265
    APPLICATION INFORMATION
    output clamping (continued)
    4
    3
    2
    1
    0
    1
    2
    3
    4
    3
    2
    1
    012345
    OUTPUT VOLTAGE
    vs
    CLAMP VOLTAGE (VL)
    Clamp Voltage V
    RL=5.1 k
    V
    O
    Output
    V
    oltage
    V
    VCC=±5 V & ±15 V
    VI=5 V
    Gain=+2 dB
    RL=500
    4
    3
    2
    1
    0
    1
    2
    3
    4
    5
    4
    3
    2
    1
    01234
    OUTPUT VOLTAGE
    vs
    CLAMP VOLTAGE (VH)
    Clamp Voltage V
    RL=5.1 k
    V
    O
    Output
    V
    oltage
    V
    VCC=±5 V & ±15 V
    VI=5 V
    Gain=+2 dB
    RL=500
    Figure 58. Output Voltage vs Clamp Voltage
    The accuracy of this clamp is dependant on the amount of current flowing through the internal clamping diodes.
    As is typical with all diodes, the voltage drop across this diode increases with current. Therefore, the accuracy
    of the clamp is highly dependant upon the output voltage, the clamping voltage difference, and the output
    current. The accuracy of the clamps with different load resistances are shown in Figure 59.
    200
    160
    120
    80
    40
    0
    40
    5
    4
    3
    2
    1
    0
    VL=4 V
    NEGATIVE CLAMP ACCURACY (VL)
    Expected Output Voltage V
    RL=500
    Gain = +2dB
    VL=1 V
    VL=2 V
    VL=3 V
    160
    120
    80
    40
    0
    40
    80
    5
    4
    3
    2
    1
    0
    VL=4 V
    RL=1 k
    Gain = +2dB
    VL=1 V
    VL=2 V
    VL=3 V
    NEGATIVE CLAMP ACCURACY (VL)
    Expected Output Voltage V
    160
    120
    80
    40
    0
    40
    80
    5
    4
    3
    2
    1
    0
    VL=4 V
    RL=5.1 k
    Gain = +2dB
    VL=1 V
    VL=2 V
    VL=3 V
    NEGATIVE CLAMP ACCURACY (VL)
    Expected Output Voltage V
    V
    O
    V
    CLAMP
    V
    O
    V
    CLAMP
    V
    O
    V
    CLAMP
    80
    40
    0
    40
    80
    120
    160
    012345
    VH=4 V
    RL=500
    Gain = +2dB
    VH=1 V
    VH=2 V
    VH=3 V
    POSITIVE CLAMP ACCURACY (VH)
    Expected Output Voltage V
    120
    80
    40
    0
    40
    80
    120
    012345
    VH=4 V
    RL=1 k
    Gain = +2dB
    VH=1 V
    VH=2 V
    VH=3 V
    POSITIVE CLAMP ACCURACY (VH)
    Expected Output Voltage V
    120
    80
    40
    0
    40
    80
    120
    012345
    VH=4 V
    RL=5.1 k
    Gain = +2dB
    VH=1 V
    VH=2 V
    VH=3 V
    POSITIVE CLAMP ACCURACY (VH)
    Expected Output Voltage V
    V
    O
    V
    CLAMP
    V
    O
    V
    CLAMP
    V
    O
    V
    CLAMP
    Figure 59. Clamping Accuracy
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