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    參數(shù)資料
    型號: LT1490CMS8#TRPBF
    廠商: Linear Technology
    文件頁數(shù): 1/12頁
    文件大?。?/td> 0K
    描述: IC OP-AMP R-R IN/OUT DUAL 8-MSOP
    標(biāo)準(zhǔn)包裝: 2,500
    系列: Over-The-Top®
    放大器類型: 通用
    電路數(shù): 2
    輸出類型: 滿擺幅
    轉(zhuǎn)換速率: 0.07 V/µs
    增益帶寬積: 200kHz
    電流 - 輸入偏壓: 4nA
    電壓 - 輸入偏移: 400µV
    電流 - 電源: 50µA
    電流 - 輸出 / 通道: 25mA
    電壓 - 電源,單路/雙路(±): 2 V ~ 44 V,±1 V ~ 22 V
    工作溫度: -40°C ~ 85°C
    安裝類型: 表面貼裝
    封裝/外殼: 8-TSSOP,8-MSOP(0.118",3.00mm 寬)
    供應(yīng)商設(shè)備封裝: 8-MSOP
    包裝: 帶卷 (TR)
    1
    LT1490/LT1491
    Dual and Quad
    Micropower Rail-to-Rail
    Input and Output Op Amps
    s
    Rail-to-Rail Input and Output
    s
    Single Supply Input Range: – 0.4V to 44V
    s
    Micropower: 50
    A/Amplifier Max
    s
    MSOP Package
    s
    Specified on 3V, 5V and
    ±15V Supplies
    s
    High Output Current: 20mA
    s
    Output Drives 10,000pF with Output Compensation
    s
    Reverse Battery Protection to 18V
    s
    No Supply Sequencing Problems
    s
    High Voltage Gain: 1500V/mV
    s
    High CMRR: 98dB
    s
    No Phase Reversal
    s
    Gain Bandwidth Product: 200kHz
    The dual LT
    1490 and quad LT1491 op amps operate on all
    single and split supplies with a total voltage of 2V to 44V
    drawing only 40
    A of quiescent current per amplifier. These
    amplifiers are reverse supply protected; they draw no current
    for reverse supply up to 18V. The input range of the LT1490/
    LT1491 includes both supplies and the output swings to both
    supplies. Unlike most micropower op amps, the LT1490/
    LT1491 can drive heavy loads; their rail-to-rail outputs drive
    20mA. The LT1490/LT1491 are unity-gain stable and drive all
    capacitive loads up to 10,000pF when optional 0.22
    F and
    150
    compensation is used.
    The LT1490/LT1491 have a unique input stage that oper-
    ates and remains high impedance when above the positive
    supply. The inputs take 44V both differential and common
    mode even when operating on a 3V supply. Built-in resis-
    tors protect the inputs for faults below the negative supply
    up to 22V. There is no phase reversal of the output for inputs
    22V below V or 44V above V , independent of V +.
    The LT1490 dual op amp is available in the 8-pin MSOP,
    SO and PDIP packages. The quad LT1491 is available in
    the 14-pin SO and PDIP packages.
    For new designs it is recommended that the LT1490A/
    LT1491A be used instead of the LT1490/LT1491. See the
    LT1490A/LT1491A data sheet for details.
    s
    Battery- or Solar-Powered Systems
    Portable Instrumentation
    Sensor Conditioning
    s
    Supply Current Sensing
    s
    Battery Monitoring
    s
    Micropower Active Filters
    s
    4mA to 20mA Transmitters
    +
    +
    RA
    2k
    Q2
    2N3904
    S1
    S1 = OPEN, GAIN = 1
    S1 = CLOSED, GAIN = 10
    RA = RB
    VS = 5V, 0V
    10k
    90.9k
    VOUT
    LOGIC
    1490/91 TA01
    LOGIC HIGH (5V) = CHARGING
    LOGIC LOW (0V) = DISCHARGING
    RG
    10k
    Q1
    2N3904
    RS
    0.2
    CHARGER
    VOLTAGE
    A
    1/4 LT1491
    B
    1/4 LT1491
    RA'
    2k
    RB
    2k
    VBATT = 12V
    IBATT
    +
    RB'
    2k
    LOAD
    +
    +
    C
    1/4 LT1491
    D
    1/4 LT1491
    VOUT
    (RS)(RG/RA)(GAIN)
    VOUT
    GAIN
    IBATT =
    =
    AMPS
    Battery Monitor
    FEATURES
    DESCRIPTIO
    U
    APPLICATIO S
    U
    TYPICAL APPLICATIO
    U
    , LTC and LT are registered trademarks of Linear Technology Corporation.
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