AD9778

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

  1. Ultralow noise and intermodulation distortion (IMD) enable high quality synthesis of wideband signals from baseband to high intermediate frequencies.
  2. A proprietary DAC output switching technique enhances dynamic performance.
  3. The current outputs are easily configured for various single-ended or differential circuit topologies.
  4. CMOS data input interface with adjustable set up and hold.
  5. 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

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    利用AD-DAC-FMC-ADP适配板,ADI公司的所有DPG2兼容型高速DAC评估板都能够用在配备FMC连接器的Xilinx®评估板上。 该适配板采用低引脚数(LPC)的FMC连接器,因此能够用在LPC或HPC主机上(例如ML605或SP605)。

    有关兼容评估板的列表,请查看数据模式发生器(DPG)高速DAC评估平台页面的“DPG2”信息。


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    AD9778 材料声明
    PCN-PDN信息 质量和可靠性 原理图符号和PCB封装

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    所示报价为单片价格。所列的美国报价单仅供预算参考,指美元报价(每片美国离岸价),如有修改恕不另行通知。由于地区关税、商业税、汇率及手续费原因,国际报价可能不同。