• 參數(shù)資料
    型號: MAX4076EUK-T
    廠商: MAXIM INTEGRATED PRODUCTS INC
    元件分類: 運(yùn)動控制電子
    英文描述: Micropower, SOT23, Rail-to-Rail, Fixed-Gain, GainAmp/Open-Loop Op Amps
    中文描述: OP-AMP, 3500 uV OFFSET-MAX, 0.23 MHz BAND WIDTH, PDSO5
    封裝: SOT-23, 5 PIN
    文件頁數(shù): 11/20頁
    文件大?。?/td> 412K
    代理商: MAX4076EUK-T
    M
    Micropower, SOT23, Rail-to-Rail,
    Fixed-Gain, GainAmp/Open-Loop Op Amps
    ______________________________________________________________________________________
    11
    GainAmp Bandwidth
    GainAmp fixed-gain amplifiers feature factory-trimmed
    precision resistors to provide fixed inverting gains from
    -0.25V/V to -100V/V or noninverting gains from +1.25V/V
    to +101V/V. The op amp core is decompensated strate-
    gically over the gain-set options to maximize band-
    width. Open-loop decompensation increases GBW
    product, ensuring that usable bandwidth is maintained
    with increasing closed-loop gains. A GainAmp with a
    fixed gain of A
    V
    = +25V/V has a -3dB bandwidth of
    120kHz. By comparison, a unity-gain-stable op amp con-
    figured for A
    V
    = +25V/V would yield a -3dB bandwidth
    of only 8kHz. Decompensation is performed at five inter-
    mediate gain sets, as shown in the
    Gain Selector
    Guide
    .
    High-Voltage (±17V)
    Input Fault Protection
    The MAX4074/MAX4075 family includes ±17V input
    fault protection. For normal operation, see the input
    voltage range specification in the
    Electrical Character-
    istics
    . Overdriven inputs up to ±17V will not cause out-
    put phase reversal. A back-to-back SCR structure at
    the input pins allows either input to safely swing ±17V
    relative to V
    EE
    (Figure 2). Additionally, the internal op
    amp inputs are diode clamped to both supply rails for
    the protection of sensitive input stage circuitry. Current
    through the clamp diodes is limited by a 5k
    resistor at
    the noninverting input, and by R
    G
    at the inverting input.
    An IN+ or IN- fault voltage as high as ±17V causes less
    than 3.5mA to flow through the input pin, protecting
    both the GainAmp and the signal source from damage.
    Applications Information
    GainAmp fixed-gain amplifiers offer a precision, fixed-
    gain amplifier in a small package that can be used in a
    variety of circuit board designs. GainAmp fixed-gain
    amplifiers can be used in many op amp circuits that
    use resistive negative feedback to set gain, and do not
    require other connections to the op amp inverting input.
    Both inverting and noninverting op amp configurations
    can be implemented easily using a GainAmp.
    GainAmp Input Voltage Range
    The MAX4074/MAX4075 combine both an op amp and
    gain-setting feedback resistors on the same IC. The
    inverting input voltage range is different from the nonin-
    verting input voltage range because the inverting input
    pin is connected to the R
    G
    input series resistor. Just as
    with a discrete design, take care not to saturate the
    inputs/output of the core op amp to avoid signal distor-
    tions or clipping.
    OUT
    IN-
    IN+
    R
    G
    R
    F
    5k
    NOTE:
    INPUT STAGE PROTECTION INCLUDES TWO 17V SCRs
    AND TWO DIODES AT THE INPUT STAGE.
    V
    EE
    MAX4074
    MAX4075
    17V
    SCR
    V
    EE
    V
    EE
    V
    CC
    17V
    SCR
    Figure 2. Input Protection
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