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    首页产品索引AD9778

    AD9778

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    Dual 14-Bit, 1 GSPS, Digital-to-Analog Converter

    制造商:ADI/AD

    中文数据手册

    产品信息

    优势和特点

      Low power: 1.0 W @ 1 GSPS, 600 mW @ 500 MSPS, full operating conditions

      SFDR = 78 dBc to fOUT = 100 MHz

      Single carrier WCDMA ACLR = 79 dBc @ 80 MHz IF

      Analog output: adjustable 8.7 mA to 31.7 mA, RL = 25 Ω to 50 Ω

      Novel 2×, 4×, and 8× interpolator/coarse complex modulator allows carrier placement anywhere in DAC bandwidth

      Auxiliary DACs allow control of external VGA and offset control

      Multiple chip synchronization interface

      High performance, low noise PLL clock multiplier

      Digital inverse sinc filter

      100-lead, exposed paddle TQFP package

    产品详情

    The AD9776/AD9778/AD9779 are dual, 12-/14-/16-bit, high dynamic range, digital-to-analog converters (DACs) that provide a sample rate of 1 GSPS, permitting multicarrier generation up to the Nyquist frequency. They include features optimized for direct conversion transmit applications, including complex digital modulation, and gain and offset compensation. The DAC outputs are optimized to interface seamlessly with analog quad-rature modulators such as the AD8349. A serial peripheral interface (SPI®) provides for programming/readback of many internal parameters. Full-scale output current can be programmed over a range of 10 mA to 30 mA. The devices are manufactured on an advanced 0.18 μm CMOS process and operate on 1.8 V and 3.3 V supplies for a total power consumption of 1.0 W. They are enclosed in 100-lead TQFP packages.

    Product Highlights

      Ultralow noise and intermodulation distortion (IMD) enable high quality synthesis of wideband signals from baseband to high intermediate frequencies.

      A proprietary DAC output switching technique enhances dynamic performance.

      The current outputs are easily configured for various single-ended or differential circuit topologies.

      CMOS data input interface with adjustable set up and hold.

      Novel 2×, 4×, and 8× interpolator/coarse complex modulator allows carrier placement anywhere in DAC bandwidth.

    Applications

      Wireless infrastructure WCDMA, CDMA2000, TD-SCDMA, WiMax, GSM

      Digital high or low IF synthesis

      Internal digital upconversion capability

      Transmit diversity

      Wideband communications: LMDS/MMDS, point-to-point

    Data Sheet, Rev. A, 3/07

    技术资料

    标题类型大小(KB)下载
    AN-748: Set-Up and Hold Measurements in High Speed CMOS Input DACs (Rev. 0)PDF812 点击下载

    应用案例更多案例

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