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    产品型号MAX6129BEUK21+T的Datasheet PDF文件预览

    19-2507; Rev 2; 3/05  
    Ultra-Low-Power Series Voltage Reference  
    General Description  
    Features  
    ♦ Ultra-Low 5.25µA (max) Supply Current  
    ♦ 4mA Output Source Current  
    ♦ 1mA Output Sink Current  
    The MAX6129 micropower, low-dropout bandgap volt-  
    age reference combines ultra-low supply current and  
    low drift in a miniature 5-pin SOT23 surface-mount  
    package that uses 70% less board space than compa-  
    rable devices in an SO package. This series-mode volt-  
    age reference sources up to 4mA and sinks up to 1mA  
    of load current. A wide 2.5V to 12.6V supply range,  
    ultra-low 5.25µA (max) supply current, and a low  
    200mV dropout voltage make these devices ideal for  
    battery-operated systems.  
    ♦ ±±.4ꢀ (max) ꢁnitial Accuracy  
    ♦ 4±ppm/°C (max) Temperature Coefficient  
    ♦ 2.5V to 12.6V Supply Range  
    ♦ Low 2±±mV Dropout  
    ♦ Stable with Capacitive Loads Up to 1±µF  
    ♦ No External Capacitors Required  
    ♦ Miniature 5-Pin SOT23 Package  
    An initial accuracy of 0.4% and a 40ppm/°C (max) tem-  
    perature coefficient make the MAX6129 suitable for  
    precision applications. Additionally, an internal com-  
    pensation capacitor eliminates the need for an external  
    compensation capacitor and ensures stability with load  
    capacitances up to 10µF.  
    Ordering Information  
    OUTPUT  
    VOLTAGE  
    (V)  
    PꢁN-  
    PART  
    TEMP RANGE  
    PACKAGE  
    The MAX6129 provides six output voltages of 2.048V,  
    2.5V, 3V, 3.3V, 4.096V, and 5V. The MAX6129 is avail-  
    able in a 5-pin SOT23 package and in die form.  
    MAX6129_EUK21-T -40°C to +85°C 5 SOT23-5  
    MAX6129AC/D21 -40°C to +85°C Dice  
    MAX6129_EUK25-T -40°C to +85°C 5 SOT23-5  
    MAX6129AC/D25 -40°C to +85°C Dice  
    MAX6129_EUK30-T -40°C to +85°C 5 SOT23-5  
    MAX6129AC/D30 -40°C to +85°C Dice  
    MAX6129_EUK33-T -40°C to +85°C 5 SOT23-5  
    MAX6129AC/D33 -40°C to +85°C Dice  
    MAX6129_EUK41-T -40°C to +85°C 5 SOT23-5  
    MAX6129AC/D41 -40°C to +85°C Dice  
    MAX6129_EUK50-T -40°C to +85°C 5 SOT23-5  
    MAX6129AC/D50 -40°C to +70°C Dice  
    2.048  
    2.048  
    2.500  
    2.500  
    3.000  
    3.000  
    3.300  
    3.300  
    4.096  
    4.096  
    5.000  
    5.000  
    Applications  
    Battery-Powered Systems  
    Handheld Instruments  
    Precision Power Supplies  
    A/D and D/A Converters  
    Note: The MAX6129_EUK is available in A or B grade. Choose  
    the desired grade from the Selector Guide and insert the suffix  
    in the blank above to complete the part number.  
    Typical Operating Circuit  
    Selector Guide appears at end of data sheet.  
    V
    = 2.5V TO 12.6V  
    IN  
    Pin Configuration  
    *
    TOP VIEW  
    IN  
    IN  
    GND  
    N.C.  
    1
    2
    3
    5
    4
    OUT  
    N.C.  
    MAX6129  
    MAX6129  
    GND  
    OUT  
    SOT23  
    *CAPACITOR IS OPTIONAL  
    ________________________________________________________________ Maxim Integrated Products  
    1
    For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
    1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
    Ultra-Low-Power Series Voltage Reference  
    ABSOLUTE MAXꢁMUM RATꢁNGS  
    IN to GND...............................................................-0.3V to +13V  
    Operating Temperature Range ...........................-40°C to +85°C  
    Storage Temperature Range.............................-65°C to +150°C  
    Lead Temperature (soldering, 10s) .................................+300°C  
    OUT to GND ..............-0.3V to the lower of +6V and (V + 0.3V)  
    Output to GND Short-Circuit Duration........................Continuous  
    IN  
    Continuous Power Dissipation (T = +70°C)  
    A
    5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW  
    Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional  
    operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to  
    absolute maximum rating conditions for extended periods may affect device reliability.  
    ELECTRꢁCAL CHARACTERꢁSTꢁCS—MAX6129_21 (V  
    = 2.±48V)  
    OUT  
    (V = 2.5V, I  
    = 0, T = T  
    to T  
    , unless otherwise noted. Typical values are at T = +25°C.) (Note 1)  
    MAX A  
    IN  
    OUT  
    A
    MIN  
    PARAMETER  
    SYMBOL  
    CONDꢁTꢁONS  
    MꢁN  
    TYP  
    MAX  
    UNꢁTS  
    OUTPUT  
    MAX6129A ( 0.4%) 2.0398 2.0480 2.0562  
    Output Voltage  
    V
    T
    = +25°C  
    A
    V
    OUT  
    MAX6129B ( 1%)  
    2.0275 2.0480 2.0685  
    MAX6129A  
    MAX6129B  
    40  
    Output Voltage Temperature  
    Coefficient (Notes 2, 3)  
    TCV  
    ppm/°C  
    µV/V  
    OUT  
    100  
    Line Regulation (Note 4)  
    ∆V  
    /∆V  
    V
    = 2.5V to 12.6V  
    27  
    0.22  
    2.4  
    200  
    0.7  
    5.5  
    OUT  
    IN  
    IN  
    I
    I
    = 0 to 4mA  
    = 0 to -1mA  
    OUT  
    OUT  
    ∆V  
    ∆I  
    /
    OUT  
    Load Regulation (Note 4)  
    µV/µA  
    OUT  
    Output Short-Circuit Current  
    Long-Term Stability  
    I
    60  
    mA  
    ppm  
    ppm  
    SC  
    ∆V  
    /time 1000 hours at +25°C  
    150  
    140  
    OUT  
    Thermal Hysteresis  
    (Note 5)  
    DYNAMꢁC CHARACTERꢁSTꢁCS  
    f = 0.1Hz to 10Hz  
    30  
    115  
    43  
    µV  
    P-P  
    Noise Voltage  
    e
    OUT  
    f = 10Hz to 1kHz  
    = 2.5V 200mV, f = 120Hz  
    µV  
    RMS  
    Ripple Rejection  
    Turn-On Settling Time  
    ꢁNPUT  
    ∆V  
    /∆V  
    V
    IN  
    dB  
    µs  
    OUT  
    IN  
    t
    To V  
    = 0.1% of final value  
    OUT  
    450  
    R
    Supply Voltage Range  
    Supply Current  
    V
    2.5  
    12.6  
    5.25  
    V
    IN  
    I
    µA  
    IN  
    Change in Supply Current  
    (Note 4)  
    I
    /V  
    IN IN  
    V
    = 2.5V to 12.6V  
    IN  
    1.0  
    1.5  
    µA/V  
    2
    _______________________________________________________________________________________  
    Ultra-Low-Power Series Voltage Reference  
    ELECTRꢁCAL CHARACTERꢁSTꢁCS—MAX6129_25 (V  
    = 2.5±±V)  
    OUT  
    (V = 2.7V, I  
    = 0, T = T  
    to T  
    , unless otherwise noted. Typical values are at T = +25°C.) (Note 1)  
    MAX A  
    IN  
    OUT  
    A
    MIN  
    PARAMETER  
    SYMBOL  
    CONDꢁTꢁONS  
    MꢁN  
    TYP  
    MAX  
    UNꢁTS  
    OUTPUT  
    MAX6129A ( 0.4%) 2.4900 2.5000 2.5100  
    Output Voltage  
    V
    T
    = +25°C  
    A
    V
    OUT  
    MAX6129B ( 1%)  
    2.4750 2.5000 2.5250  
    MAX6129A  
    MAX6129B  
    40  
    Output Voltage Temperature  
    Coefficient (Notes 2, 3)  
    TCV  
    ppm/°C  
    µV/V  
    OUT  
    100  
    Line Regulation (Note 4)  
    ∆V  
    /∆V  
    V
    = 2.7V to 12.6V  
    30  
    0.1  
    2.5  
    0.3  
    140  
    60  
    230  
    0.6  
    OUT  
    IN  
    IN  
    I
    I
    I
    I
    = 0 to 4mA  
    = 0 to -1mA  
    = 0  
    OUT  
    OUT  
    OUT  
    OUT  
    Load Regulation (Note 4)  
    ∆V  
    /∆I  
    µV/µA  
    OUT OUT  
    6.2  
    100  
    200  
    Dropout Voltage (Notes 4, 6)  
    V
    - V  
    mV  
    IN  
    OUT  
    = 4mA  
    Output Short-Circuit Current  
    Long-Term Stability  
    I
    mA  
    ppm  
    ppm  
    SC  
    ∆V  
    /time 1000 hours at +25°C  
    150  
    140  
    OUT  
    Thermal Hysteresis  
    (Note 5)  
    DYNAMꢁC CHARACTERꢁSTꢁCS  
    f = 0.1Hz to 10Hz  
    39  
    137  
    34  
    µV  
    P-P  
    Noise Voltage  
    e
    OUT  
    f = 10Hz to 1kHz  
    = 2.7V 200mV, f = 120Hz  
    µV  
    RMS  
    Ripple Rejection  
    Turn-On Settling Time  
    ꢁNPUT  
    ∆V  
    /∆V  
    V
    IN  
    dB  
    ms  
    OUT  
    IN  
    t
    To V  
    = 0.1% of final value  
    OUT  
    700  
    R
    Supply Voltage Range  
    Supply Current  
    V
    2.7  
    12.6  
    5.75  
    V
    IN  
    I
    IN  
    µA  
    Change in Supply Current  
    (Note 4)  
    I
    /V  
    IN IN  
    V
    = 2.7V to 12.6V  
    IN  
    1.0  
    1.5  
    µA/V  
    _______________________________________________________________________________________  
    3
    Ultra-Low-Power Series Voltage Reference  
    ELECTRꢁCAL CHARACTERꢁSTꢁCS—MAX6129_3± (V  
    = 3.±±±V)  
    OUT  
    (V = 3.2V, I  
    = 0, T = T  
    to T  
    , unless otherwise noted. Typical values are at T = +25°C.) (Note 1)  
    MAX A  
    IN  
    OUT  
    A
    MIN  
    PARAMETER  
    SYMBOL  
    CONDꢁTꢁONS  
    MꢁN  
    TYP  
    MAX  
    UNꢁTS  
    OUTPUT  
    MAX6129A ( 0.4%) 2.9880 3.0000 3.0120  
    Output Voltage  
    V
    T
    = +25°C  
    A
    V
    OUT  
    MAX6129B ( 1%)  
    2.9700 3.0000 3.0300  
    MAX6129A  
    MAX6129B  
    40  
    Output Voltage Temperature  
    Coefficient (Notes 2, 3)  
    TCV  
    ppm/°C  
    µV/V  
    OUT  
    100  
    Line Regulation (Note 4)  
    ∆V  
    /∆V  
    V
    = 3.2V to 12.6V  
    15  
    0.1  
    2.4  
    0.2  
    140  
    25  
    250  
    0.6  
    OUT  
    IN  
    IN  
    I
    I
    I
    I
    = 0 to 4mA  
    = 0 to -1mA  
    = 0  
    OUT  
    OUT  
    OUT  
    OUT  
    ∆V  
    ∆I  
    /
    OUT  
    Load Regulation (Note 4)  
    µV/µA  
    OUT  
    6.5  
    100  
    200  
    Dropout Voltage (Notes 4, 6)  
    V
    - V  
    mV  
    IN  
    OUT  
    = 4mA  
    Output Short-Circuit Current  
    Long-Term Stability  
    I
    mA  
    ppm  
    ppm  
    SC  
    ∆V  
    /time 1000 hours at +25°C  
    150  
    140  
    OUT  
    Thermal Hysteresis  
    (Note 5)  
    DYNAMꢁC CHARACTERꢁSTꢁCS  
    f = 0.1Hz to 10Hz  
    50  
    161  
    37  
    µV  
    P-P  
    Noise Voltage  
    e
    OUT  
    f = 10Hz to 1kHz  
    = 3.2V 200mV, f = 120Hz  
    µV  
    RMS  
    Ripple Rejection  
    Turn-On Settling Time  
    ꢁNPUT  
    ∆V  
    /∆V  
    V
    IN  
    dB  
    µs  
    OUT  
    IN  
    t
    To V  
    = 0.1% of final value  
    OUT  
    775  
    R
    Supply Voltage Range  
    Supply Current  
    V
    3.2  
    12.6  
    6.75  
    V
    IN  
    I
    µA  
    IN  
    Change in Supply Current  
    (Note 4)  
    I
    /V  
    IN IN  
    V
    = 3.2V to 12.6V  
    IN  
    1.0  
    1.5  
    µA/V  
    4
    _______________________________________________________________________________________  
    Ultra-Low-Power Series Voltage Reference  
    ELECTRꢁCAL CHARACTERꢁSTꢁCS—MAX6129_33 (V  
    = 3.3±±V)  
    OUT  
    (V = 3.5V, I  
    = 0, T = T  
    to T  
    , unless otherwise noted. Typical values are at T = +25°C.) (Note 1)  
    MAX A  
    IN  
    OUT  
    A
    MIN  
    PARAMETER  
    SYMBOL  
    CONDꢁTꢁONS  
    MꢁN  
    TYP  
    MAX  
    UNꢁTS  
    OUTPUT  
    MAX6129A ( 0.4%) 3.2868 3.3000 3.3132  
    Output Voltage  
    V
    T
    = +25°C  
    A
    V
    OUT  
    MAX6129B ( 1%)  
    3.2670 3.3000 3.3330  
    MAX6129A  
    MAX6129B  
    40  
    Output Voltage Temperature  
    Coefficient (Notes 2, 3)  
    TCV  
    ppm/°C  
    µV/V  
    OUT  
    100  
    Line Regulation (Note 4)  
    ∆V  
    /∆V  
    V
    = 3.5V to 12.6V  
    30  
    0.1  
    2.4  
    0.2  
    140  
    25  
    270  
    0.6  
    7
    OUT  
    IN  
    IN  
    I
    I
    I
    I
    = 0 to 4mA  
    = 0 to -1mA  
    = 0  
    OUT  
    OUT  
    OUT  
    OUT  
    Load Regulation (Note 4)  
    ∆V  
    /∆I  
    µV/µA  
    OUT OUT  
    100  
    200  
    Dropout Voltage (Notes 4, 6)  
    V
    - V  
    mV  
    IN  
    OUT  
    = 4mA  
    Output Short-Circuit Current  
    Long-Term Stability  
    I
    mA  
    ppm  
    ppm  
    SC  
    ∆V  
    /time 1000 hours at +25°C  
    150  
    140  
    OUT  
    Thermal Hysteresis  
    (Note 5)  
    DYNAMꢁC CHARACTERꢁSTꢁCS  
    f = 0.1Hz to 10Hz  
    56  
    174  
    38  
    1
    µV  
    P-P  
    Noise Voltage  
    e
    OUT  
    f = 10Hz to 1kHz  
    = 3.5V 200mV, f = 120Hz  
    µV  
    RMS  
    Ripple Rejection  
    Turn-On Settling Time  
    ꢁNPUT  
    ∆V  
    /∆V  
    V
    IN  
    dB  
    ms  
    OUT  
    IN  
    t
    To V  
    = 0.1% of final value  
    OUT  
    R
    Supply Voltage Range  
    Supply Current  
    V
    3.5  
    12.6  
    7.25  
    V
    IN  
    I
    IN  
    µA  
    Change in Supply Current  
    (Note 4)  
    I /V  
    IN IN  
    V
    = 3.5V to 12.6V  
    IN  
    1.0  
    1.5  
    µA/V  
    _______________________________________________________________________________________  
    5
    Ultra-Low-Power Series Voltage Reference  
    ELECTRꢁCAL CHARACTERꢁSTꢁCS—MAX6129_41 (V  
    = 4.±96V)  
    OUT  
    (V = 4.3V, I  
    = 0, T = T  
    to T  
    , unless otherwise noted. Typical values are at T = +25°C.) (Note 1)  
    MAX A  
    IN  
    OUT  
    A
    MIN  
    PARAMETER  
    SYMBOL  
    CONDꢁTꢁONS  
    MꢁN  
    TYP  
    MAX  
    UNꢁTS  
    OUTPUT  
    MAX6129A ( 0.4%) 4.0796 4.0960 4.1124  
    Output Voltage  
    V
    T
    = +25°C  
    A
    V
    OUT  
    MAX6129B ( 1%)  
    4.0550 4.0960 4.1370  
    MAX6129A  
    MAX6129B  
    40  
    Output Voltage Temperature  
    Coefficient (Notes 2, 3)  
    TCV  
    ppm/°C  
    µV/V  
    OUT  
    100  
    Line Regulation (Note 4)  
    ∆V  
    /∆V  
    V
    = 4.3V to 12.6V  
    30  
    0.1  
    310  
    0.6  
    OUT  
    IN  
    IN  
    I
    I
    I
    I
    = 0 to 4mA  
    = 0 to -1mA  
    = 0  
    OUT  
    OUT  
    OUT  
    OUT  
    Load Regulation (Note 4)  
    ∆V  
    /∆I  
    µV/µA  
    OUT OUT  
    2.5  
    8.5  
    0.18  
    140  
    25  
    100  
    200  
    Dropout Voltage (Notes 4, 6)  
    V
    - V  
    mV  
    IN  
    OUT  
    = 4mA  
    Output Short-Circuit Current  
    Long-Term Stability  
    I
    mA  
    ppm  
    ppm  
    SC  
    ∆V  
    /time 1000 hours at +25°C  
    150  
    140  
    OUT  
    Thermal Hysteresis  
    (Note 5)  
    DYNAMꢁC CHARACTERꢁSTꢁCS  
    f = 0.1Hz to 10Hz  
    72  
    210  
    36  
    µV  
    P-P  
    Noise Voltage  
    e
    OUT  
    f = 10Hz to 1kHz  
    = 4.3V 200mV, f = 120Hz  
    µV  
    RMS  
    Ripple Rejection  
    Turn-On Settling Time  
    ꢁNPUT  
    ∆V  
    /∆V  
    V
    IN  
    dB  
    ms  
    OUT  
    IN  
    t
    To V  
    = 0.1% of final value  
    OUT  
    1.2  
    R
    Supply Voltage Range  
    Supply Current  
    V
    4.3  
    12.6  
    8.75  
    V
    IN  
    I
    µA  
    IN  
    Change in Supply Current  
    (Note 4)  
    I
    /V  
    IN IN  
    V
    = 4.3V to 12.6V  
    IN  
    1.0  
    1.5  
    µA/V  
    6
    _______________________________________________________________________________________  
    Ultra-Low-Power Series Voltage Reference  
    ELECTRꢁCAL CHARACTERꢁSTꢁCS—MAX6129_5± (V  
    = 5.±±±V)  
    OUT  
    (V = 5.2V, I  
    = 0, T = T  
    to T  
    , unless otherwise noted. Typical values are at T = +25°C.) (Note 1)  
    MAX A  
    IN  
    OUT  
    A
    MIN  
    PARAMETER  
    SYMBOL  
    CONDꢁTꢁONS  
    MꢁN  
    TYP  
    MAX  
    UNꢁTS  
    OUTPUT  
    MAX6129A ( 0.4%) 4.9800 5.0000 5.0200  
    Output Voltage  
    V
    T
    = +25°C  
    A
    V
    OUT  
    MAX6129B ( 1%)  
    4.9500 5.0000 5.0500  
    MAX6129A  
    MAX6129B  
    40  
    Output Voltage Temperature  
    Coefficient (Notes 2, 3)  
    TCV  
    ppm/°C  
    µV/V  
    OUT  
    100  
    Line Regulation (Note 4)  
    ∆V  
    /∆V  
    V
    = 5.2V to 12.6V  
    34  
    0.3  
    375  
    0.8  
    9
    OUT  
    IN  
    IN  
    I
    I
    I
    I
    = 0 to 4mA  
    = 0 to -1mA  
    = 0  
    OUT  
    OUT  
    OUT  
    OUT  
    ∆V  
    ∆I  
    /
    OUT  
    Load Regulation (Note 4)  
    µV/µA  
    OUT  
    3.3  
    0.175  
    140  
    25  
    100  
    200  
    Dropout Voltage (Notes 4, 6)  
    V
    - V  
    mV  
    IN  
    OUT  
    = 4mA  
    Output Short-Circuit Current  
    Long-Term Stability  
    I
    mA  
    ppm  
    ppm  
    SC  
    ∆V  
    /time 1000 hours at +25°C  
    150  
    140  
    OUT  
    Thermal Hysteresis  
    (Note 5)  
    DYNAMꢁC CHARACTERꢁSTꢁCS  
    f = 0.1Hz to 10Hz  
    90  
    245  
    38  
    µV  
    P-P  
    Noise Voltage  
    e
    OUT  
    f = 10Hz to 1kHz  
    = 5.2V 200mV, f = 120Hz  
    µV  
    RMS  
    Ripple Rejection  
    Turn-On Settling Time  
    ꢁNPUT  
    ∆V  
    /∆V  
    V
    IN  
    dB  
    ms  
    OUT  
    IN  
    t
    To V  
    = 0.1% of final value  
    OUT  
    1.4  
    R
    Supply Voltage Range  
    Supply Current  
    V
    5.2  
    12.6  
    10.5  
    V
    IN  
    I
    µA  
    IN  
    Change in Supply Current  
    (Note 4)  
    I /V  
    IN IN  
    V
    = 5.2V to 12.6V  
    IN  
    1.0  
    1.5  
    µA/V  
    Note 1: MAX6129 is 100% production tested at T = +25°C and is guaranteed by design for T = T  
    to T as specified.  
    MAX  
    A
    A
    MIN  
    ✕
    Note 2: Temperature coefficient is defined by box method: (V  
    - V  
    )/(∆T  
    MIN  
    V
    ).  
    +25°C  
    MAX  
    Note 3: Not production tested. Guaranteed by design for both SOT23 and dice.  
    Note 4: Only the typical values apply to MAX6129A sold in die form (max values apply to packaged parts).  
    Note 5: Thermal hysteresis is defined as the change in output voltage at T = +25°C before and after cycling the device from T  
    A
    MAX  
    to T  
    .
    MIN  
    Note 6: Dropout voltage is the minimum input voltage at which V  
    changes by 0.1% from V at rated V and is guaranteed by  
    OUT IN  
    OUT  
    Load Regulation Test.  
    _______________________________________________________________________________________  
    7
    Ultra-Low-Power Series Voltage Reference  
    Typical Operating Characteristics  
    (V = 2.5V for MAX_EUK21, V = 3.2V for MAX_EUK30, and V = 5.2V for MAX_EUK50, I  
    = 0, T = +25°C, unless otherwise  
    A
    IN  
    IN  
    IN  
    OUT  
    noted.)  
    OUTPUT VOLTAGE vs. TEMPERATURE  
    OUTPUT VOLTAGE vs. TEMPERATURE  
    OUTPUT VOLTAGE vs. TEMPERATURE  
    (V  
    OUT  
    = 2.048V)  
    (V  
    = 3V)  
    (V = 5V)  
    OUT  
    OUT  
    2.050  
    2.048  
    2.046  
    2.044  
    2.042  
    2.040  
    3.003  
    3.001  
    2.999  
    2.997  
    2.995  
    2.993  
    2.991  
    5.006  
    5.004  
    5.002  
    5.000  
    4.998  
    4.996  
    4.994  
    4.992  
    4.990  
    4.988  
    3 TYPICAL UNITS  
    3 TYPICAL UNITS  
    3 TYPICAL UNITS  
    -40  
    -15  
    10  
    35  
    60  
    85  
    -40  
    -15  
    10  
    35  
    60  
    85  
    -40  
    -15  
    10  
    35  
    60  
    85  
    TEMPERATURE (°C)  
    TEMPERATURE (°C)  
    TEMPERATURE (°C)  
    DROPOUT VOLTAGE vs. SOURCE CURRENT  
    SUPPLY CURRENT vs. INPUT VOLTAGE  
    SUPPLY CURRENT vs. TEMPERATURE  
    (V  
    = 2.048V)  
    OUT  
    0.16  
    0.14  
    0.12  
    0.10  
    0.08  
    0.06  
    0.04  
    0.02  
    0
    14  
    12  
    10  
    8
    7.0  
    6.5  
    6.0  
    5.5  
    5.0  
    4.5  
    4.0  
    3.5  
    3.0  
    2.5  
    V
    = 5V  
    V
    OUT  
    = 3V  
    OUT  
    V
    = 3V  
    OUT  
    6
    V
    = 2.048V  
    OUT  
    4
    V
    = 2.048V  
    OUT  
    10  
    2
    V
    6
    = 5V  
    8
    OUT  
    7
    0
    0
    1
    2
    3
    4
    5
    6
    7
    0
    1
    2
    3
    4
    5
    9
    10 11 12 13  
    -40  
    -15  
    35  
    60  
    85  
    SOURCE CURRENT (mA)  
    INPUT VOLTAGE (V)  
    TEMPERATURE (°C)  
    DROPOUT VOLTAGE vs. SOURCE CURRENT  
    DROPOUT VOLTAGE vs. SOURCE CURRENT  
    LOAD REGULATION  
    (V  
    = 3V)  
    (V  
    = 5V)  
    (V  
    = 2.048V)  
    OUT  
    OUT  
    OUT  
    0.11  
    0.10  
    0.09  
    0.08  
    0.07  
    0.06  
    0.05  
    0.04  
    0.03  
    0.02  
    0.01  
    0
    0.09  
    0.08  
    0.07  
    0.06  
    0.05  
    0.04  
    0.03  
    0.02  
    0.01  
    0
    2.0520  
    2.0515  
    2.0510  
    2.0505  
    2.0500  
    2.0495  
    2.0490  
    2.0485  
    2.0480  
    2.0475  
    2.0470  
    0
    1
    2
    3
    4
    5
    6
    7
    0
    1
    2
    3
    4
    5
    6
    7
    -2 -1  
    0
    1
    2
    3
    4
    5
    6
    7
    SOURCE CURRENT (mA)  
    SOURCE CURRENT (mA)  
    OUTPUT CURRENT (mA)  
    8
    _______________________________________________________________________________________  
    Ultra-Low-Power Series Voltage Reference  
    Typical Operating Characteristics (continued)  
    (V = 2.5V for MAX_EUK21, V = 3.2V for MAX_EUK30, and V = 5.2V for MAX_EUK50, I  
    = 0, T = +25°C, unless otherwise  
    A
    IN  
    IN  
    IN  
    OUT  
    noted.)  
    LINE REGULATION  
    LINE REGULATION  
    (V = 2.048V)  
    LOAD REGULATION  
    (V = 3V)  
    OUT  
    (V  
    = 3V)  
    OUT  
    OUT  
    3.00180  
    3.00175  
    3.00170  
    3.00165  
    3.00160  
    3.00155  
    2.04792  
    3.0055  
    3.0050  
    3.0045  
    3.0040  
    3.0035  
    3.0030  
    3.0025  
    3.0020  
    3.0015  
    3.0010  
    2.04790  
    2.04788  
    2.04786  
    2.04784  
    2.04782  
    2.04780  
    2.04778  
    2.04776  
    2.04774  
    2.04772  
    3
    4
    5
    6
    7
    8
    9
    10 11 12 13  
    2.5 4.0 5.5 7.0 8.5 10.0 11.5 13.0  
    INPUT VOLTAGE (V)  
    -2 -1  
    0
    1
    2
    3
    4
    5
    6
    7
    INPUT VOLTAGE (V)  
    OUTPUT CURRENT (mA)  
    LOAD REGULATION  
    LINE REGULATION  
    POWER-SUPPLY REJECTION RATIO vs.  
    (V  
    = 5V)  
    (V  
    = 5V)  
    FREQUENCY (V = 2.048V)  
    OUT  
    OUT  
    OUT  
    5.0050  
    5.0045  
    5.0040  
    5.0035  
    5.0030  
    5.0025  
    5.0020  
    5.0015  
    5.0010  
    5.0005  
    5.00080  
    5.00078  
    5.00076  
    5.00074  
    5.00072  
    5.00070  
    5.00068  
    5.00066  
    5.00064  
    0
    -10  
    -20  
    -30  
    -40  
    -50  
    -60  
    -2 -1  
    0
    1
    2
    3
    4
    5
    6
    7
    5
    6
    7
    8
    9
    10 11 12 13  
    0.1  
    1
    10  
    FREQUENCY (kHz)  
    100  
    1000  
    OUTPUT CURRENT (mA)  
    INPUT VOLTAGE (V)  
    LINE-TRANSIENT RESPONSE  
    (V = 2.048V)  
    POWER-SUPPLY REJECTION RATIO  
    POWER-SUPPLY REJECTION RATIO  
    vs. FREQUENCY (V  
    = 3V)  
    vs. FREQUENCY (V  
    = 5V)  
    OUT  
    OUT  
    OUT  
    MAX6129 toc18  
    0
    -10  
    -20  
    -30  
    -40  
    -50  
    -60  
    0
    -5  
    3V  
    V
    IN  
    200mV/div  
    AC-COUPLED  
    -10  
    -15  
    -20  
    -25  
    -30  
    -35  
    -40  
    -45  
    -50  
    2.5V  
    V
    2.048V  
    OUT  
    200mV/div  
    AC-COUPLED  
    0.1  
    1
    10  
    FREQUENCY (kHz)  
    100  
    1000  
    0.1  
    1
    10  
    FREQUENCY (kHz)  
    100  
    1000  
    200µs/div  
    _______________________________________________________________________________________  
    9
    Ultra-Low-Power Series Voltage Reference  
    Typical Operating Characteristics (continued)  
    (V = 2.5V for MAX_EUK21, V = 3.2V for MAX_EUK30, and V = 5.2V for MAX_EUK50, I  
    = 0, T = +25°C, unless otherwise  
    A
    IN  
    IN  
    IN  
    OUT  
    noted.)  
    LINE-TRANSIENT RESPONSE  
    LINE-TRANSIENT RESPONSE  
    (V = 5V)  
    (V  
    = 3V)  
    OUT  
    OUT  
    MAX6129 toc19  
    MAX6129 toc20  
    3.7V  
    3.2V  
    5.7V  
    V
    V
    IN  
    200mV/div  
    AC-COUPLED  
    IN  
    200mV/div  
    AC-COUPLED  
    5.2V  
    5V  
    V
    OUT  
    100mV/div  
    AC-COUPLED  
    V
    3V  
    OUT  
    200mV/div  
    AC-COUPLED  
    200µs/div  
    200µs/div  
    LOAD-TRANSIENT RESPONSE  
    LOAD-TRANSIENT RESPONSE  
    (SINKING, V = 2.048V)  
    (SOURCING, V  
    = 2.048V)  
    OUT  
    OUT  
    MAX6129 toc21  
    MAX6129 toc22  
    C
    = 0  
    C
    = 0  
    OUT  
    OUT  
    I
    OUT  
    0
    2mA/div  
    I
    -1mA  
    OUT  
    4mA  
    0
    10mA/div  
    V
    V
    OUT  
    500mV/div  
    OUT  
    2.048V  
    2.048V  
    500mV/div  
    AC-COUPLED  
    AC-COUPLED  
    100µs/div  
    1ms/div  
    LOAD-TRANSIENT RESPONSE  
    LOAD-TRANSIENT RESPONSE  
    (SINKING, V = 2.048V)  
    (SOURCING, V  
    = 2.048V)  
    OUT  
    OUT  
    MAX6129 toc23  
    MAX6129 toc24  
    C
    = 1µF  
    OUT  
    C
    = 1µF  
    OUT  
    I
    OUT  
    4mA  
    0
    0
    10mA/div  
    I
    OUT  
    -1mA  
    2mA/div  
    V
    V
    OUT  
    500mV/div  
    OUT  
    2.048V  
    2.048V  
    500mV/div  
    AC-COUPLED  
    AC-COUPLED  
    400µs/div  
    1ms/div  
    1± ______________________________________________________________________________________  
    Ultra-Low-Power Series Voltage Reference  
    Typical Operating Characteristics (continued)  
    (V = 2.5V for MAX_EUK21, V = 3.2V for MAX_EUK30, and V = 5.2V for MAX_EUK50, I  
    = 0, T = +25°C, unless otherwise  
    A
    IN  
    IN  
    IN  
    OUT  
    noted.)  
    LOAD-TRANSIENT RESPONSE  
    LOAD-TRANSIENT RESPONSE  
    (SINKING, V = 5V)  
    (SOURCING, V  
    = 5V)  
    OUT  
    OUT  
    MAX6129 toc25  
    MAX6129 toc26  
    C
    = 0  
    C
    = 0  
    OUT  
    OUT  
    I
    OUT  
    4mA  
    0
    0
    10mA/div  
    I
    OUT  
    1mA/div  
    -1mA  
    V
    OUT  
    5V  
    500mV/div  
    V
    OUT  
    AC-COUPLED  
    5V  
    1V/div  
    AC-COUPLED  
    400µs/div  
    2ms/div  
    LOAD-TRANSIENT RESPONSE  
    (SOURCING, V = 5V)  
    LOAD-TRANSIENT RESPONSE  
    (SINKING, V = 5V)  
    OUT  
    OUT  
    MAX6129 toc27  
    MAX6129 toc28  
    C
    = 1µF  
    C
    = 1µF  
    OUT  
    OUT  
    I
    OUT  
    4mA  
    0
    10mA/div  
    0
    I
    OUT  
    1mA/div  
    -1mA  
    V
    OUT  
    200mV/div  
    AC-COUPLED  
    6V  
    V
    OUT  
    5V  
    1V/div  
    AC-COUPLED  
    400µs/div  
    2ms/div  
    TURN-ON TRANSIENT  
    (V = 2.048V)  
    TURN-ON TRANSIENT  
    (V = 3V)  
    OUT  
    OUT  
    MAX6129 toc29  
    MAX6129 toc30  
    3.2V  
    2.5V  
    V
    IN  
    V
    IN  
    1V/div  
    2V/div  
    0
    0
    3V  
    V
    OUT  
    1V/div  
    2.048V  
    V
    OUT  
    1V/div  
    0
    0
    200µs/div  
    200µs/div  
    ______________________________________________________________________________________ 11  
    Ultra-Low-Power Series Voltage Reference  
    Typical Operating Characteristics (continued)  
    (V = 2.5V for MAX_EUK21, V = 3.2V for MAX_EUK30, and V = 5.2V for MAX_EUK50, I  
    = 0, T = +25°C, unless otherwise  
    A
    IN  
    IN  
    IN  
    OUT  
    noted.)  
    TURN-ON TRANSIENT  
    (V = 5V)  
    0.1Hz TO 10Hz OUTPUT NOISE  
    0.1Hz TO 10Hz OUTPUT NOISE  
    (V  
    = 3V)  
    (V  
    = 2.048V)  
    OUT  
    OUT  
    OUT  
    MAX6129 toc31  
    MAX6129 toc33  
    MAX6129 toc32  
    5.2V  
    V
    IN  
    2V/div  
    V
    V
    OUT  
    OUT  
    0
    5V  
    10µV/div  
    10µV/div  
    V
    OUT  
    2V/div  
    0
    400µs/div  
    1s/div  
    1s/div  
    0.1Hz TO 10Hz OUTPUT NOISE  
    (V = 5V)  
    NOISE vs. FREQUENCY  
    NOISE vs. FREQUENCY  
    (V  
    = 2.048V)  
    (V  
    = 3V)  
    OUT  
    OUT  
    OUT  
    MAX6129 toc34  
    4.0  
    3.5  
    3.0  
    2.5  
    2.0  
    1.5  
    1.0  
    0.5  
    0
    6.5  
    6.0  
    5.5  
    5.0  
    4.5  
    4.0  
    3.5  
    3.0  
    2.5  
    2.0  
    1.5  
    1.0  
    0.5  
    0
    V
    OUT  
    20µV/div  
    1s/div  
    0
    10  
    20  
    30  
    40  
    50  
    0
    10  
    20  
    30  
    40  
    50  
    FREQUENCY (kHz)  
    FREQUENCY (kHz)  
    NOISE vs. FREQUENCY  
    (V  
    = 5V)  
    OUT  
    20  
    18  
    16  
    14  
    12  
    10  
    8
    6
    4
    2
    0
    0
    10  
    20  
    30  
    40  
    50  
    FREQUENCY (kHz)  
    12 ______________________________________________________________________________________  
    Ultra-Low-Power Series Voltage Reference  
    Supply Current  
    The quiescent supply current of the series-mode  
    Pin Description  
    PꢁN  
    1
    NAME  
    IN  
    FUNCTꢁON  
    Positive Voltage Supply  
    Ground  
    MAX6129 is very small, 5.25µA (max), and is very sta-  
    ble against changes in the supply voltage with only  
    1.5µA/V (max) variation with supply voltage. The  
    MAX6129 family draws load current from the input volt-  
    age source only when required, so supply current is not  
    wasted and efficiency is maximized at all input volt-  
    ages. This improved efficiency reduces power dissipa-  
    tion and extends battery life.  
    2
    GND  
    Internally connected. Leave  
    unconnected or connect to ground.  
    3, 4  
    5
    N.C.  
    OUT  
    Reference Output  
    Applications Information  
    Output Thermal Hysteresis  
    Output thermal hysteresis is the change of output volt-  
    Input Bypassing  
    age at T = +25°C before and after the device is  
    A
    The MAX6129 does not require an input bypass capac-  
    itor. For improved transient performance, bypass the  
    input to ground with a 0.1µF ceramic capacitor. Place  
    the capacitor as close to IN as possible.  
    cycled over its entire operating temperature range.  
    Hysteresis is caused by differential package stress  
    appearing across the device.  
    Temperature Coefficient vs. Operating  
    Temperature Range for a 1LSB  
    Load Capacitance  
    The MAX6129 does not require an output capacitor for  
    stability. The MAX6129 is stable driving capacitive  
    loads from 0 to 100pF and 0.1µF to 10µF when sourc-  
    ing current and from 0 to 0.4µF when sinking current. In  
    applications where the load or the supply can experi-  
    ence step changes, an output capacitor reduces the  
    amount of overshoot (undershoot) and improves the cir-  
    cuit’s transient response. Many applications do not  
    require an external capacitor, and the MAX6129 offers  
    a significant advantage in applications where board  
    space is critical.  
    Maximum Error  
    In a data converter application, the reference voltage of  
    the converter must stay within a certain limit to keep the  
    error in the data converter smaller than the resolution  
    limit through the operating temperature range. Figure 1  
    shows the maximum allowable reference voltage tem-  
    perature coefficient to keep the conversion error to less  
    than 1LSB, as a function of the operating temperature  
    range (T  
    - T  
    ) with the converter resolution as a  
    MIN  
    MAX  
    parameter. The graph assumes the reference-voltage  
    temperature coefficient as the only parameter affecting  
    accuracy.  
    10,000  
    1000  
    100  
    8 BIT  
    TEMPERATURE  
    10  
    10 BIT  
    COEFFICIENT  
    (ppm/°C)  
    12 BIT  
    1
    14 BIT  
    16 BIT  
    0.1  
    18 BIT  
    20 BIT  
    100  
    0.01  
    1
    10  
    OPERATING TEMPERATURE RANGE (T  
    - T ) (°C)  
    MAX MIN  
    Figure 1. Temperature Coefficient vs. Operating Temperature Range for a 1LSB Maximum Error  
    ______________________________________________________________________________________ 13  
    Ultra-Low-Power Series Voltage Reference  
    V
    V
    IN  
    2V  
    IN  
    V+  
    V-  
    CC  
    +REF  
    OUTPUT  
    IN  
    OUT  
    MAX681  
    MAX6129  
    GND  
    1MΩ  
    1MΩ  
    V+  
    GND  
    -REF  
    OUTPUT  
    -2V  
    IN  
    10nF  
    MAX480  
    V-  
    Figure 2. Positive and Negative References from a Single 3V/5V Supply  
    In reality, the absolute static accuracy of a data con-  
    verter is dependent on the combination of many para-  
    meters such as integral nonlinearity, differential  
    nonlinearity, offset error, gain error, as well as voltage  
    reference changes.  
    Positive and Negative Low-Power Voltage  
    Reference  
    Figure 2 shows a typical method for developing a bipo-  
    lar reference. The circuit uses a MAX681 voltage dou-  
    bler/inverter charge-pump converter to power a  
    MAX480, creating a positive as well as a negative refer-  
    ence voltage.  
    Turn-On Time  
    These devices typically turn on and settle to within  
    0.1% of their final value in less than 1.4ms. The turn-on  
    time increases when heavily loaded and operating  
    close to dropout.  
    14 ______________________________________________________________________________________  
    Ultra-Low-Power Series Voltage Reference  
    Selector Guide  
    TEMPERATURE  
    COEFFꢁCꢁENT  
    OUTPUT  
    VOLTAGE (V)  
    ꢁNꢁTꢁAL  
    ACCURACY (ꢀ)  
    PART  
    PꢁN-PACKAGE  
    TOP MARK  
    (ppm/°C)  
    MAX6129AEUK21-T  
    MAX6129AC/D21  
    5 SOT23-5  
    Dice  
    2.048  
    2.048  
    2.048  
    2.500  
    2.500  
    2.500  
    3.000  
    3.000  
    3.000  
    3.300  
    3.300  
    3.300  
    4.096  
    4.096  
    4.096  
    5.000  
    5.000  
    5.000  
    0.4  
    0.4  
    1
    40  
    40  
    ADRM  
    —
    MAX6129BEUK21-T  
    MAX6129AEUK25-T  
    MAX6129AC/D25  
    5 SOT23-5  
    5 SOT23-5  
    Dice  
    100  
    40  
    ADRN  
    ADRO  
    —
    0.4  
    0.4  
    1
    40  
    MAX6129BEUK25-T*  
    MAX6129AEUK30-T  
    MAX6129AC/D30  
    5 SOT23-5  
    5 SOT23-5  
    Dice  
    100  
    40  
    ADRP  
    ADRQ  
    —
    0.4  
    0.4  
    1
    40  
    MAX6129BEUK30-T  
    MAX6129AEUK33-T  
    MAX6129AC/D33  
    5 SOT23-5  
    5 SOT23-5  
    Dice  
    100  
    40  
    ADRR  
    ADRW  
    —
    0.4  
    0.4  
    1
    40  
    MAX6129BEUK33-T  
    MAX6129AEUK41-T  
    MAX6129AC/D41  
    5 SOT23-5  
    5 SOT23-5  
    Dice  
    100  
    40  
    ADRX  
    ADRS  
    —
    0.4  
    0.4  
    1
    100  
    100  
    40  
    MAX6129BEUK41-T  
    MAX6129AEUK50-T  
    MAX6129AC/D50  
    5 SOT23-5  
    5 SOT23-5  
    Dice  
    ADRT  
    ADRU  
    —
    0.4  
    0.4  
    1
    40  
    MAX6129BEUK50-T  
    5 SOT23-5  
    100  
    ADRV  
    *Future product—contact factory for availability.  
    Chip Information  
    Chip Topography  
    TRANSISTOR COUNT: 30  
    PROCESS: BiCMOS  
    OUT  
    N.C.  
    N.C.  
    N.C.  
    SUBSTRATE CONNECTED TO GND  
    GND  
    N.C.  
    N.C.  
    IN  
    ______________________________________________________________________________________ 15  
    Ultra-Low-Power Series Voltage Reference  
    Package Information  
    (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,  
    go to www.maxim-ic.com/packages.)  
    PACKAGE OUTLINE, SOT-23, 5L  
    1
    E
    21-0057  
    1
    Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are  
    implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.  
    16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600  
    © 2005 Maxim Integrated Products  
    Printed USA  
    is a registered trademark of Maxim Integrated Products, Inc.  
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