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    产品型号BA7149的Datasheet PDF文件预览

    Video ICs  
    Electronic viewfinder driver  
    BA7149F  
    The BA7149F is an electronic viewfinder driver for video cameras. It separates the synchronous signal from the input  
    video signal, and outputs the vertical deflection drive output and horizontal deflection signals. HD and VD output sig-  
    nals with guaranteed phase difference are also provided for on-screen displays (OSD). The differences between the  
    BA7149F and the BA7148F are the horizontal blanking, horizontal AFC output, HD output phase and pulse width.  
    Applications  
    •
    Video cameras  
    Features  
    •
    1) Operates off a 5V power supply.  
    2) Built-in vertical deflection circuit.  
    3) Built-in wide-bandwidth amplifier.  
    4) Built-in HD and VD output terminals.  
    5) Few attached components required.  
    6) SOP 16pin package.  
    7) Compatible with 10µ sec flyback pulses.  
    Absolute maximum ratings (Ta = 25°C)  
    •
    Parameter  
    Symbol  
    VCC Max.  
    Pd  
    Limits  
    8.0  
    Unit  
    V
    Applied voltage  
    Power dissipation  
    500  
    mW  
    Operating temperature  
    Storage temperature  
    Topr  
    – 20 ~ + 75  
    °C  
    °C  
    Tstg  
    – 55 ~ + 125  
    Reduced by 5mW for each increase in Ta of 1°C over 25°C.  
    Recommended operating conditions (Ta = 25°C)  
    •
    Parameter  
    Symbol  
    VCC  
    Min.  
    4.5  
    Typ.  
    5.0  
    Max.  
    5.5  
    Unit  
    Power supply voltage  
    V
    1
    Video ICs  
    BA7149F  
    Block diagram  
    •
    16  
    15  
    14  
    13  
    12  
    11  
    10  
    9
    SYNC  
    SEPA  
    PHASE  
    COMP  
    H.OSC  
    6dB  
    AMP  
    V.SEPA  
    H.BLK  
    V.BLK  
    V.DRIVE  
    V.OSC  
    1
    2
    3
    4
    5
    6
    7
    8
    Pin descriptions  
    •
    Pin No.  
    Pin No.  
    9
    Function  
    Function  
    1
    2
    3
    4
    5
    6
    7
    8
    Vertical control input  
    HD output  
    GND 2  
    10  
    Power supply 1  
    11  
    Vertical deflection drive (POS)  
    GND 1  
    Video input  
    12  
    Power supply 2  
    Video output  
    13  
    Vertical deflection drive (NEG)  
    14  
    Vertical oscillator external resistor  
    Vertical oscillator external capacitor  
    VD output  
    Phase comparator output  
    15  
    Horizontal oscillator external resistor  
    Horizontal AFC output  
    16  
    2
    Video ICs  
    BA7149F  
    Electrical characteristics (unless otherwise noted, Ta = 25°C and Vcc = 5.0V)  
    •
    Parameter  
    Symbol  
    ICC  
    Min.  
    31.0  
    Typ.  
    42.0  
    Max.  
    55.0  
    Unit  
    mA  
    Operating current dissipation  
    VIDEO AMP  
    Voltage gain  
    GV  
    DRV  
    5.3  
    3.20  
    – 2.0  
    —
    6.0  
    3.50  
    0.0  
    6.7  
    —
    dB  
    P-P  
    D range  
    V
    Frequency characteristic  
    Minimum sync separation voltage  
    Horizontal blanking width  
    Vertical blanking width  
    Horizontal  
    fC  
    + 2.0  
    120  
    dB  
    P-P  
    mV  
    Vsyn · Min.  
    TH · BL  
    TV · BL  
    45  
    9.6  
    10.7  
    970  
    11.4  
    1070  
    µs  
    µs  
    870  
    fH · O  
    ∆f CAP  
    THP  
    13.9  
    ± 2.1  
    10.2  
    – 1.9  
    0.5  
    15.7  
    ± 3.0  
    11.1  
    – 1.2  
    1.1  
    17.5  
    —
    kHz  
    kHz  
    µs  
    Free-running frequency  
    Capture range  
    12.0  
    – 0.5  
    1.7  
    AFC output pulse width  
    AFC lock-in phase  
    Pulse voltage low  
    Vertical  
    THPH  
    VHPL  
    µs  
    V
    fV · O  
    51.3  
    2.10  
    2.10  
    54.8  
    2.70  
    2.70  
    58.2  
    —
    Hz  
    Free-running frequency  
    Pin 3 maximum output amplitude  
    Pin 5 maximum output amplitude  
    HD · VD  
    P-P  
    VVP · Max.  
    VVN · Max.  
    V
    P-P  
    —
    V
    THVD  
    THD  
    17.3  
    8.7  
    860  
    —
    21.3  
    9.9  
    25.3  
    11.1  
    1060  
    0.3  
    µs  
    µs  
    µs  
    V
    Phase difference  
    HD pulse width  
    TVD  
    960  
    0.1  
    V pulse width  
    VHV · L  
    VHV · H  
    Pulse voltage low  
    4.7  
    4.9  
    —
    V
    Pulse voltage high  
    ᭺Not designed for radiation resistance.  
    3
    Video ICs  
    BA7149F  
    Input / output circuits  
    •
    2, 3, 4, 5pin  
    6pin  
    1pin  
    2pin  
    12pin  
    12pin  
    10k  
    1.9k  
    +
    V
    2.33V  
    500  
    500  
    2k  
    2k  
    300  
    300  
    3pin  
    5pin  
    +
    V
    12k  
    6pin  
    1.5V  
    1pin  
    4pin  
    Fig.2  
    Fig.3  
    Fig.1  
    8pin  
    9pin  
    7pin  
    2pin  
    2pin  
    9pin  
    12pin  
    5k 5k 5k  
    20k  
    10k  
    8pin  
    12pin  
    10k  
    20k  
    20k  
    8µA  
    7pin  
    25k  
    20k  
    20k  
    Fig.5  
    Fig.6  
    Fig.4  
    14pin  
    13pin  
    11pin  
    50  
    12pin  
    12pin  
    100  
    11pin  
    12pin  
    3k  
    3k  
    3k 3k 3k  
    13pin  
    1mA  
    14pin  
    1k  
    100  
    +
    V
    1.87V  
    1.25k  
    100  
    36µA  
    3k 3k 3k  
    3k  
    100  
    Fig.7  
    Fig.9  
    Fig.8  
    4
    Video ICs  
    BA7149F  
    16pin  
    15pin  
    2pin  
    12pin  
    12pin  
    20k  
    20k  
    500  
    16pin  
    10k 10k  
    10k  
    12k  
    15pin  
    +
    2k 2k  
    V
    2.8V  
    Fig.11  
    Fig.10  
    Circuit operation  
    Input signals  
    •
    IH  
    H Pulse only  
    63.556µ  
    Pulse IH  
    0.29V at 11pin  
    H Pulse only  
    Pulse IS  
    adj.at 11pin  
    4.7µ  
    262.5H  
    V Pulse only  
    16.683m  
    Pulse IV  
    Fig.12  
    The video signal input to pin 11 is detected by the charg-  
    ing and discharging of an external capacitor. Sync sepa-  
    ration is done in the SYNC SEPA block. The H. SYNC  
    signal is sent to the H. OSC, and the V. SYNC signal is  
    sync-separated in the vertical sync pulse interval and sup-  
    plied to the V. OSC block.  
    cuit, the inherent oscillation period of the oscillation circuit  
    is made slightly larger than the vertical sync signal period,  
    so that the sync signal always enters slightly early.  
    The oscillator output alone is not enough to ensure stable  
    operation for the vertical deflection output circuit, so it is  
    amplified by the V. DRIVE block.  
    The H. OSC block consists of a PLL that oscillates in sync  
    with the sync-separated H. SYNC signal, and outputs the  
    HD pulse and horizontal deflection pulse.  
    The horizontal and vertical blanking signals generated in  
    the H. OSC and V. OSC blocks are used to erase the hor-  
    izontal retrace line from the video signal input to pin 11.  
    The signal is inverted and amplified by a 6dB inverting  
    amplifier and output as a negative-polarity video signal.  
    In the V. OSC block, a direct-control method is used with  
    the sync signal. To synchronize the vertical oscillator cir-  
    5
    Video ICs  
    BA7149F  
    Application example  
    •
    VIDEO OUT  
    VCC  
    VCC  
    VIDEO IN  
    FBT  
    100µ  
    15k  
    470  
    1µ  
    +
    1500pF  
    100k  
    470  
    HD  
    +
    10k  
    1µ  
    +
    0.22µ  
    +
    510k  
    390k  
    16  
    15  
    14  
    13  
    12  
    11  
    10  
    9
    PHASE  
    COMP  
    SYNC  
    SEPA  
    H.OSC  
    6dB  
    AMP  
    V.SEPA  
    H.BLK  
    V.BLK  
    V.DRIVE  
    V.OSC  
    1
    2
    3
    4
    5
    6
    7
    8
    VCC  
    15k  
    0.1µ  
    5mH + 36Ω  
    +
    VD  
    0.022µ  
    47µ  
    VR1  
    100  
    3.9  
    Fig.13  
    1 The resistors connected to pins 6 and 15 should have a tolerance of ± 2%, and a temperature  
    coefficient of ± 100ppm or lower.  
    2 The capacitor connected to pin7 should have a tolerance of ± 5%, and a temperature coefficient of  
    ± 250ppm or lower.  
    6
    Video ICs  
    BA7149F  
    Operation notes  
    •
    (1) H.OSC free-run frequency and capture range  
    The free-run frequency is determined by the 115kΩ  
    resistor connected between pin 15 and GND. The cap-  
    ture range is varied by the resistors and capacitor con-  
    nected to pins 14 and 15.  
    (3) Use with PAL systems  
    In PAL systems, change the value of the resistor con-  
    nected between pin 6 and GND to 18kΩ.  
    (4) PCB pattern  
    The large-signal systems and small-signal systems in  
    the IC have been kept separate, and the external wring  
    must also be done in such a way to prevent interfer-  
    ence from occurring. In particular, to prevent the FBT  
    return current from interfering with the V. OSC circuit  
    on pins 6 and 7, do not directly connect the pin 4 GND  
    and pin 6 and 7 GND.  
    The free-run frequency and capture range for this IC  
    are guaranteed for these circuit constant values, and  
    we recommend that you use them. The resistor 115kΩ  
    connected between pin15 and GND should have a tol-  
    erance of ± 2%, and a temperature coefficient of ±  
    100ppm or lower.  
    (2) V.OSC free-run frequency  
    The V.OSC free-run frequency is determined by the  
    15kΩ resistor connected between pin 6 and GND, and  
    the 0.1µF capacitor connected between pin 7 and  
    GND.  
    VCC  
    G
    The free-run frequency and capture range for this IC  
    are guaranteed for these circuit constant values, and  
    we recommend that you use them. The resistor 15kΩ  
    connected between pin 6 and GND should have a tol-  
    erance of ± 2%, and a temperature coefficient of ±  
    100ppm or lower, and the capacitor connected  
    between pin 7 and GND should have a tolerance of ±  
    5%, and a temperature coefficient of ± 250ppm or  
    lower.  
    1
    2
    3
    4
    5
    6
    7
    8
    16  
    15  
    14  
    13  
    12  
    11  
    10  
    9
    FBT  
    Do not connect pin 4 GND  
    to pin 6 and 7 GND.  
    Fig.14  
    External dimensions (Units: mm)  
    •
    10.0 ± 0.2  
    16  
    1
    9
    8
    1.27 0.4 ± 0.1  
    0.3Min.  
    0.15  
    SOP16  
    7
    配单直通车
    BA7149F产品参数
    型号:BA7149F
    是否无铅： 不含铅
    是否Rohs认证： 符合
    生命周期：Active
    IHS 制造商：ROHM CO LTD
    零件包装代码：SOIC
    包装说明：SOP-16
    针数：16
    Reach Compliance Code：compliant
    HTS代码：8542.39.00.01
    风险等级：5.58
    商用集成电路类型：CONSUMER CIRCUIT
    JESD-30 代码：R-PDSO-G16
    JESD-609代码：e3/e2
    长度：10 mm
    端子数量：16
    最高工作温度：70 °C
    最低工作温度：-20 °C
    封装主体材料：PLASTIC/EPOXY
    封装代码：LSOP
    封装等效代码：SOP16,.25
    封装形状：RECTANGULAR
    封装形式：SMALL OUTLINE, LOW PROFILE
    峰值回流温度（摄氏度）：260
    电源：5 V
    认证状态：Not Qualified
    座面最大高度：1.6 mm
    子类别：Other Consumer ICs
    最大压摆率：55 mA
    最大供电电压 (Vsup)：5 V
    最小供电电压 (Vsup)：5 V
    表面贴装：YES
    技术：BIPOLAR
    温度等级：COMMERCIAL
    端子面层：TIN/TIN COPPER
    端子形式：GULL WING
    端子节距：1.27 mm
    端子位置：DUAL
    处于峰值回流温度下的最长时间：10
    宽度：4.4 mm
    Base Number Matches：1
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