• AD9859: FAQ

    FAQ

  • Can I use the AD9859 without using external components to create a square wave?

    Q 

    Can I use the AD9859 without using external components to create a square wave?

     

    A 

    The AD9859 cannot generate a square wave clock.

    In order to use on of our DDS devices, (some of  which have a resolution of 48
    bits), the reference frequency will…

  • AD9951/AD9859 temperature-depended stability issue

    Hello everyone,

    I'm working on a project containing the AD9951 as frequency generator for 145 MHz. Previously to that, the AD9859 was used, but was swapped for the pin-compatible AD9951 because of availability reasons. The issue described in the following…

  • AD9859 TCXO oscillator module selection

    Hello,

    I need help selecting an low temperature drift oscillator for the AD9859. Could someone point me to tips or a reference design? The eval board uses a connector for external clock.

    The datasheet says REFCLK input power -15 dBm to 3 dBm, with input…

  • AD9859 spurs

    Hello, I'm designed a dds generator on AD9859. I use a 24,576MHz clock with internal multiplier by 16x. On output I have a lot of -20dB spurs of 24.576MHz and it harmonics. Playing with level, charge pump current,pcp design has no result. What am I do…

  • AD9859 REFCLK

    Hi

    I have a 20MHz OCXO already on the board and want to use the CMOS output as an input for the AD9859 but i'm not quite sure if i calculated the levels correctly:

    The clock is a 0V - 3.3V square wave so i divide the clock voltage by 2 (resistors)…

  • AD9859 latency

    Hi 

    AD9859 Datasheet have  latency spec in below  description.(only min)

    I think that latency  [SYSCLK  Cycles] is decided by logic and these don't have dispersion.

    Are there some dispersion in these specifications.

    If  these have dispersion, how…

  • RE: Manual for AD9859

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • RE: AD9859 not working

    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    …

  • RE: AD9859寄存器无法写入数据

    This question has been closed by the EZ team and is assumed answered.