# LF147 , LF247 , LF347

## WIDE BANDWIDTH QUAD J-FET OPERATIONAL AMPLIFIERS

    Document Number:          2151
    Date Update:              13/3/96
    Pages:                    10

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    WIDE BANDWIDTH
    QUAD J-FET OPERATIONAL AMPLIFIERS
    .
    LOW POWER CONSUMPTION
    .
    WIDE  COMMON-MODE  (UP  TO  V
    CC
    +
    )  AND
    DIFFERENTIAL VOLTAGE RANGE
    .
    LOW INPUT BIAS AND OFFSET CURRENT
    .
    OUTPUT SHORT-CIRCUIT PROTECTION
    .
    HIGH  INPUT  IMPEDANCE  J-FET  INPUT
    STAGE
    .
    INTERNAL FREQUENCY COMPENSATION
    .
    LATCH UP FREE OPERATION
    .
    HIGH SLEW RATE : 16V/
    m
    s (typ)
    N
    DIP14
    (Plastic Package)
    Inverting Input 2
    Non-inverting Input 2
    Non-inverting Input 1
    CC
    V
    -
    CC
    V
    1
    2
    3
    4
    8
    5
    6
    7
    9
    10
    11
    12
    13
    14
    +
    Output 3
    Output 4
    Non-inverting Input 4
    Inverting Input 4
    Non-inverting Input 3
    Inverting Input 3
    -
    +
    -
    +
    -
    +
    -
    +
    Output 1
    Inverting Input 1
    Output 2
    PIN CONNECTIONS
    (top view)
    DESCRIPTION
    These circuits are high speed J-FET input quad opera-
    tional amplifiers incorporating well matched, high
    voltage J-FET and bipolar transistors in a monolithic
    integrated circuit.
    The devices feature high slew rates, low input bias and
    offset currents, and low offset voltage temperature
    coefficient.
    D
    SO14
    (Plastic Micropackage)
    LF147 - LF247
    LF347
    February 1996
    ORDER CODES
    Part
    Number
    Temperature
    Package
    N D
    LF347 0
    o
    C, +70
    o
    C
    w w
    LF247 -40
    o
    C, +105
    o
    C
    w w
    LF147 -55
    o
    C, +125
    o
    C
    w w
    1/10
    ABSOLUTE MAXIMUM RATINGS
    Symbol Parameter Value Unit
    V
    CC
    Supply Voltage - (note 1)
    +
    18 V
    V
    i
    Input Voltage - (note 3)
    +
    15 V
    V
    id
    Differential Input Voltage - (note 2)
    +
    30 V
    P
    tot
    Power Dissipation 680 mW
    Output Short-circuit Duration - (note 4) Infinite
    T
    oper
    Operating Free Air Temperature Range LF347
    LF247
    LF147
    0 to 70
    -40 to 105
    -55 to 125
    o
    C
    T
    stg
    Storage Temperature Range -65 to 150
    o
    C
    Notes : 1. All voltage values, except differential voltage, are with respect to the zero reference level (ground) of the supply voltages where the
    zero reference level is the midpoint between V
    CC
    +
    and V
    CC
    -
    .
    2. Differential voltages are at the non-inverting input terminal with respect to the inverting input terminal.
    3. The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 15 volts, whichever is less.
    4. The output may be shorted to ground or to either supply. Temperature and /or supply voltages must be limited to ensure that the
    dissipation rating is not exceeded.
    Output
    Non-inverting
    input
    Inverting
    input
    V
    CC
    V
    CC
    200
    W
    W
    10 0
    W
    10 0
    1.3k
    30k
    35k
    35k
    W 10 0
    1.3k
    8.2k
    SCHEMATIC DIAGRAM
    (each amplifier)
    LF147 - LF247 - LF347
    2/10
    ELECTRICAL CHARACTERISTICS
    V
    CC
    =
    +
    15V, T
    amb
    = 25
    o
    C
    (unless otherwise specified)
    Symbol Parameter
    LF147 - LF247
    LF347
    Unit
    Min. Typ. Max.
    V
    io
    Input Offset Voltage (R
    S
    = 10k
    W
    )
    T
    amb
    = 25
    o
    C
    T
    min.
    3
    T
    amb
    3
    T
    max.
    3 10
    13
    mV
    DV
    io
    Input Offset Voltage Drift 10
    m
    V/
    o
    C
    I
    io
    Input Offset Current *
    T
    amb
    = 25
    o
    C
    T
    min.
    3
    T
    amb
    3
    T
    max.
    5 100
    4
    pA
    nA
    I
    ib
    Input Bias Current *
    T
    amb
    = 25
    o
    C
    T
    min.
    3
    T
    amb
    3
    T
    max.
    20 200
    20
    pA
    nA
    A
    vd
    Large Signal Voltage Gain (R
    L
    = 2k
    W
    , V
    O
    =
    +
    10V)
    T
    amb
    = 25
    o
    C
    T
    min.
    3
    T
    amb
    3
    T
    max.
    50
    25
    200
    V/mV
    SVR Supply Voltage Rejection Ratio (R
    S
    = 10k
    W
    )
    T
    amb
    = 25
    o
    C
    T
    min.
    3
    T
    amb
    3
    T
    max.
    80
    80
    86
    dB
    I
    CC
    Supply Current, per Amp, no Load
    T
    amb
    = 25
    o
    C
    T
    min.
    3
    T
    amb
    3
    T
    max.
    1.4 2.7
    2.7
    mA
    V
    icm
    Input Common Mode Voltage Range
    +
    11 +15
    -12
    V
    CMR Common Mode Rejection Ratio (R
    S
    = 10k
    W
    )
    T
    amb
    = 25
    o
    C
    T
    min.
    3
    T
    amb
    3
    T
    max.
    70
    70
    86
    dB
    Ios Output Short-circuit Current
    T
    amb
    = 25
    o
    C
    T
    min.
    3
    T
    amb
    3
    T
    max.
    10
    10
    40 60
    60
    mA
    +
    V
    OPP
    Output Voltage Swing
    T
    amb
    = 25
    o
    C R
    L
    =   2k
    W
    R
    L
    = 10k
    W
    T
    min.
    3
    T
    amb
    3
    T
    max.
    R
    L
    =   2k
    W
    R
    L
    = 10k
    W
    10
    12
    10
    12
    12
    13.5
    V
    SR Slew Rate
    (V
    i
    = 10V, R
    L
    = 2k
    W,
    C
    L
    = 100pF, T
    amb
    = 25
    o
    C, unity gain) 12 16
    V/
    m
    s
    t
    r
    Rise Time
    (V
    i
    = 20mV, R
    L
    = 2k
    W
    , C
    L
    = 100pF, T
    amb
    = 25
    o
    C, unity gain) 0.1
    m
    s
    K
    OV
    Overshoot
    (V
    i
    = 20mV, R
    L
    = 2k
    W
    , C
    L
    = 100pF, T
    amb
    = 25
    o
    C, unity gain) 10
    %
    GBP Gain Bandwidth Product
    (f = 100kHz, T
    amb
    = 25
    o
    C, V
    in
    = 10mV, R
    L
    = 2k
    W
    , C
    L
    =

    100pF) 2.5 4
    MHz
    R
    i
    Input Resistance 10
    12
    W
    THD Total Harmonic Distortion (f = 1kHz, A
    V
    = 20dB, R
    L
    = 2k
    W
    ,
    C
    L
    = 100pF, T
    amb
    = 25
    o
    C, V
    O
    = 2V
    PP
    ) 0.01
    %
    e
    n
    Equivalent Input Noise Voltage (f = 1kHz, R
    s
    = 100
    W
    ) 15
    nV
    / ```
    Hz
    j
    m Phase Margin 45 Degrees
    V
    O1
    /V
    O2
    Channel Separation (A
    v
    = 100, T
    amb
    = 25
    o
    C) 120 dB
    * The input bias currents are junction leakage currents which approximately double for every 10
    o
    C increase in the junction temperature.
    LF147 - LF247 - LF347
    3/10
    30
    20
    25
    15
    10
    5
    0
    MAXIMUM
    PEAK-TO-PEAK
    OUTPUT
    VOLTAGE
    (V)
    100
    1K 10K 100K 10M 1M
    FREQUENCY (Hz)
    See Figure 2
    = 2k W
    R
    L
    = +255C
    T
    a m b
    =
    15V V
    CC
    =
    5V V
    CC
    =
    10V V
    CC
    MAXIMUM PEAK-TO-PEAK OUTPUT
    VOLTAGE VERSUS FREQUENCY
    30
    20
    25
    15
    10
    5
    0
    MAXIMUM
    PEAK-TO-PEAK
    OUTPUT
    VOLTAGE
    (V)
    100
    1K 10K 100K 10M 1M
    FREQUENCY (Hz)
    See Figure 2
    = +25 C
    T
    amb
    = 10k
    W
    R
    L
    V
    CC
    =
    10V
    V
    CC
    =
    15V
    V
    CC
    =
    5V
    MAXIMUM PEAK-TO-PEAK OUTPUT
    VOLTAGE VERSUS FREQUENCY
    30
    25
    20
    15
    10
    5
    0
    MAXIMUM
    PEAK-TO-PEAK
    OUTPUT
    VOLTAGE
    (V)
    FREQUENCY (Hz)
    10k 40k 100k 400k 1M 4M 10M
    T
    amb
    = +25 C
    T
    amb
    = -55  C
    T
    amb
    = +125  C
    R
    L
    = 2k
    W
    See Figure 2
    V
    CC
    = 15V
    MAXIMUM PEAK-TO-PEAK OUTPUT
    VOLTAGE VERSUS FREQUENCY
    3 0
    2 5
    2 0
    1 0
    5
    1 5
    0
    -75 -25 2 5 7 5 125 -50 0 5 0 -50
    MAXIMUM
    PEAK-TO-PEAK
    OUTPUT
    VOLTAGE
    (V)
    TEMPERATURE (5C)
    V
    C C
    = 15V
    See Figure 2
    R
    L
    = 10k W
    R
    L
    = 2k W
    MAXIMUM PEAK-TO-PEAK OUTPUT
    VOLTAGE VERSUS FREE AIR TEMP.
    30
    25
    20
    15
    10
    5
    0
    MAXIMUM
    PEAK-TO-PEAK
    OUTPUT
    VOLTAGE
    (V)
    0.1 0.2 0.4 0.7 1 2 4 7 10
    LOAD RESISTANCE ( k
    W
    )
    T
    amb
    = +255C
    V
    CC
    =
    15V
    See Figure 2
    MAXIMUM PEAK-TO-PEAK OUTPUT
    VOLTAGE VERSUS LOAD RESISTANCE
    30
    25
    20
    15
    10
    5
    0 2 4 6 8 10 12 14 16
    MAXIMUM
    PEAK-TO-PEAK
    OUTPUT
    VOLTAGE
    (V)
    SUPPLY VOLTAGE (V)
    R
    L
    = 10 k W
    T
    amb
    = +255C
    MAXIMUM PEAK-TO-PEAK OUTPUT
    VOLTAGE VERSUS SUPPLY VOLTAGE
    LF147 - LF247 - LF347
    4/10
    100
    10
    1
    0.1
    0.01
    INPUT
    BIAS
    CURRENT
    (nA)
    -50 -25 0 25 50 75 100 125
    TEMPERATURE (5C)
    V
    CC
    =
    15V
    INPUT BIAS CURRENT VERSUS
    FREE AIR TEMPERATURE
    1000
    400
    200
    100
    20
    40
    10
    4
    2
    1
    DIFFERENTIAL
    VOLTAGE
    AMPLIFICATION
    (V/V)
    -75 -50 -25 0
    25 50 75
    100
    125
    TEMPERATURE (5C)
    R
    L
    = 2k W
    V
    O
    =    10V
    V
    CC
    =    15V
    LARGE SIGNAL DIFFERENTIAL
    VOLTAGE AMPLIFICATION VERSUS
    FREE AIR TEMPERATURE
    FREQUENCY (Hz)
    DIFFERENTIAL
    VOLTAGE
    AMPLIFICATION
    (V/V)
    100
    10
    100
    1K 10K 100K 10M 1M
    1
    DIFFERENTIAL
    VOLTAGE
    AMPLIFICATION
    (left scale)
    180
    90
    0
    R    = 2k
    W
    C    = 100pF
    V      =  15V
    T       = +125 C
    L
    L
    CC
    amb
    PHASE SHIFT
    (right scale)
    LARGE SIGNAL DIFFERENTIAL
    VOLTAGE AMPLIFICATION AND PHASE
    SHIFT VERSUS FREQUENCY
    250
    225
    200
    175
    150
    125
    100
    75
    50
    25
    0
    TOTAL
    POWER
    DISSIPATION
    (mW)
    -75 -50 -25 0
    25
    50 75 100 125
    TEMPERATURE (5C)
    V
    CC
    =
    15V
    No signal
    No load
    TOTAL POWER DISSIPATION VERSUS
    FREE AIR TEMPERATURE
    2.0
    1.8
    1.6
    1.4
    1.2
    1.0
    0.8
    0.6
    0.4
    0.2
    0
    SUPPLY
    CURRENT
    (mA)
    -75 -50 -25 0
    25
    50 75 100 125
    TEMPERATURE (5C)
    V
    CC
    =
    15V
    No signal
    No load
    SUPPLY CURRENT PER AMPLIFIER
    VERSUS FREE AIR TEMPERATURE
    2.0
    1.8
    1.6
    1.4
    1.2
    1.0
    0.8
    0.6
    0.4
    0.2
    0
    SUPPLY
    CURRENT
    (mA)
    0 2 4 6
    8
    10 12 14 16
    SUPPLY VOLTAGE (V)
    No signal
    No load
    = +255C
    T
    a m b
    SUPPLY CURRENT PER AMPLIFIER
    VERSUS SUPPLY VOLTAGE
    LF147 - LF247 - LF347
    5/10
    89
    88
    87
    86
    85
    84
    -50 -25 0 25 50 75 100 125
    COMMON
    MODE
    MODE
    REJECTION
    RATIO
    (dB)
    TEMPERATURE (5C)
    83
    -75
    R
    L
    = 10 k W
    =    15V
    V
    C C
    COMMON MODE REJECTION RATIO
    VERSUS FREE AIR TEMPERATURE
    6
    4
    2
    0
    -2
    -4
    0 0.5 1 1.5 2 2.5 3 3.5
    INPUT
    AND
    OUTPUT
    VOLTAGES
    (V)
    TIME (
    m
    s)
    -6
    =    15V
    V
    CC
    R
    L
    = 2 k
    W
    = 100pF C
    L
    T
    amb
    = +25 C
    OUTPUT
    INPUT
    VOLTAGE FOLLOWER LARGE SIGNAL
    PULSE RESPONSE
    t
    r
    28
    24
    20
    16
    12
    8
    4
    0
    -4
    OUTPUT
    VOLTAGE
    (mV)
    0 0.1 0.2
    0.3
    0.4
    0.5
    0.6
    0.7
    TIME (
    m
    s)
    10%
    90%
    OVERSHOOT
    R
    L
    = 2k W
    T
    amb
    = +255C
    V
    CC
    =   15V
    OUTPUT VOLTAGE VERSUS
    ELAPSED TIME
    70
    60
    50
    40
    30
    20
    10
    0
    EQUIVALENT
    INPUT
    NOISE
    VOLTAGE
    (nV/VHz)
    10 40 100 400 1k 4k 10k 40k 100k
    FREQUENCY (Hz)
    A
    V
    = 10
    R
    S
    = 100 W
    T
    amb
    = +255C
    V
    CC
    =    15V
    EQUIVALENT INPUT NOISE VOLTAGE
    VERSUS FREQUENCY
    1
    0.4
    0.1
    0.04
    0.01
    0.004
    0.001
    TOTAL
    HARMONIC
    DISTORTION
    (%)
    100 400 1k 4k 10k 40k 100k
    FREQUENCY (Hz)
    A
    V
    = 1
    T
    amb
    = +255C
    V
    CC
    =   15V
    = 6V
    V
    O
    (rms)
    A
    V
    = 1
    T
    amb
    = +255C
    = 6V
    V
    O
    (rms)
    V
    CC
    =    15V
    TOTAL HARMONIC DISTORTION VERSUS
    FREQUENCY
    LF147 - LF247 - LF347
    6/10
    -
    e
    I
    LF347
    1/4
    e
    o
    C
    L
    = 100pF
    R   = 2k
    W
    L
    Figure 1 :
    Voltage Follower
    PARAMETER MEASUREMENT INFORMATION
    -
    e
    I
    LF347
    R
    L
    1/4
    C
    L
    = 100pF
    1k  W
    10k  W
    e
    o
    Figure 2 :
    Gain-of-10 Inverting Amplifier
    -
    L F 3 4 7
    1/4
    -
    -
    -
    L F 3 4 7
    1/4
    LF3 4 7
    1/4
    L F 3 4 7
    1/4
    1 M
    W
    1 m F
    Output A
    Outp ut B
    Outp ut C
    I np ut
    1 0 0 k  W 1 0 0 k  W
    1 0 0 k
    W
    1 0 0 k  W
    1 O O m F
    V
    C C
    +
    f   = 100kHz
    O
    TYPICAL APPLICATIONS
    AUDIO DISTRIBUTION AMPLIFIER
    LF147 - LF247 - LF347
    7/10
    -
    -
    LF347
    1/4
    220pF
    43k  W
    Input
    1.5k  W
    43k  W
    220pF
    43k  W
    16k  W
    LF347
    1/4
    30k
    W
    Output A
    -
    LF347
    1/4
    1.5k W
    220pF
    43k  W
    220pF
    43k  W
    -
    LF347
    1/4
    43k  W
    16k  W
    30k  W
    Output B
    Ground
    TYPICAL APPLICATIONS
    (continued)
    POSITIVE FEEDBACK BANDPASS FILTER
    CASCADED BANDPASS FILTER
    fo = 100kHz ; Q = 69 ; Gain = 16
    OUTPUT B
    SECOND ORDER BANDPASS FILTER
    fo = 100kHz ; Q = 30 ; Gain = 4
    OUTPUT A
    LF147 - LF247 - LF347
    8/10
    PACKAGE MECHANICAL DATA
    14 PINS - PLASTIC DIP
    Dimensions
    Millimeters Inches
    Min. Typ. Max. Min. Typ. Max.
    a1 0.51 0.020
    B 1.39 1.65 0.055 0.065
    b 0.5 0.020
    b1 0.25 0.010
    D 20 0.787
    E 8.5 0.335
    e 2.54 0.100
    e3 15.24 0.600
    F 7.1 0.280
    i 5.1 0.201
    L 3.3 0.130
    Z 1.27 2.54 0.050 0.100
    LF147 - LF247 - LF347
    9/10
    PACKAGE MECHANICAL DATA
    14 PINS - PLASTIC MICROPACKAGE (SO)
    Dimensions
    Millimeters Inches
    Min. Typ. Max. Min. Typ. Max.
    A 1.75 0.069
    a1 0.1 0.2 0.004 0.008
    a2 1.6 0.063
    b 0.35 0.46 0.014 0.018
    b1 0.19 0.25 0.007 0.010
    C 0.5 0.020
    c1 45
    o
    (typ.)
    D 8.55 8.75 0.336 0.334
    E 5.8 6.2 0.228 0.244
    e 1.27 0.050
    e3 7.62 0.300
    F 3.8 4.0 0.150 0.157
    G 4.6 5.3 0.181 0.208
    L 0.5 1.27 0.020 0.050
    M 0.68 0.027
    S 8
    o
    (max.)
    Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsi-
    bility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which
    may result from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON
    Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes
    and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical
    components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics.
    {  1996 SGS-THOMSON Microelectronics - All Rights Reserved
    SGS-THOMSON Microelectronics GROUP OF COMPANIES
    Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands
    Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
    LF147 - LF247 - LF347
    10/10