• RE: AD9779A close in noise

    Hi Oleg,

    Thanks for the additional details. I tried your settings using the setup described on the AD9779A wiki page ( https://wiki.analog.com/resources/eval/dpg/eval-ad977xa) with the following modifications:

     - On step 8, I used 1x interpolation

     - On…

  • AD9779A操作

    你们好,

    我们正在使用AD9779A进行设计,有如下疑问:

    (1) 使用AD9779A的数据时钟信号(DATACLK)作为FPGA内部PLL的参考时钟,再用FPGA PLL产生的时钟信号把数据打出,请问FPGA PLL产生的时钟信号和AD9779A的数据时钟信号的相位关系?

    (2) AD9779A使用双端口模式,请问FPGA发送数据的时候,只要把AD9779A的TXENABLE管脚置为高电平,发送完成把TXENABLE
    管脚置为低电平,这样就ok?

    (3)  AD9779A的SPI接口: 当使用单字节传输的时候…

  • AD9779A 电流

    AD9779A  CVDD18电源总共需要多大的电流?DVDD18电源总共需要多大电流? datasheet上没有找到。

    谢谢!

  • AD9779A application

    Here we have a request in the application of high speed DAC. We’d
    like to use AD9779A, it’sthe dual DACs for I and Q output. If we use one port of it just as a direct IF
    DAC, the bandwidth is 100MHz, center frequency is 312.5MHz, is it possible?

    Objective…

  • AD9779A Timing Optimization

    I have a couple of questions regarding the Timing Optimization feature of the AD9779A DAC:

    - The datasheet states "The Data Timing Margin[3:0] variable determines how much before and after the actual data sampling point the margin test data are latched…

  • AD9779A automatic timing optimization

    I'm using automatic timing optimization mode of AD9779A.

    According to the datasheet, DATACLK Delay is increased if a setup error is detected.

    In my test board, interrupt reg keeps showing setup error (data timing error IRQ=1 & data timing error…

  • AD9779A管脚SYNC_I_P/SYNC_I_N

    请问不使用AD9779A的管脚SYNC_I_P/SYNC_I_N时,这两个管脚怎么处理?

    谢谢!

  • AD9779A emissions issue

    I’m running 160MHz in to REFCLK and configured the part to bypass its PLL, so internal DACCLK runs at 160MHz.

    I’m seeing a large 320MHz RF Emissions from the AD9779(A) part, which is causing my product to fail FCC. (See attached, measured with sniffer…

  • Max Current of AD9779A

    What is the max current of AD9779A  CVDD18 power? the max current of DVDD18 power?


    Thanks.

  • AD9779A的调制波形

    请问ADI技术工程师:    

    对AD9779A中的调制器进行相关的配置以后,正常输出波形为正弦波,可是有时候又会出现包络波形,这是怎么回事?正常的经过调制以后应该出现正弦波还是包络波形?AD9779A中有解调器吗?如果没有的话,那么正常经过调制以后不是应该出现包络波么?请帮我解答一下吧!谢谢了~