About BAPASS pin of AD9516-3


      In a recent work,we found several pieces of AD9516 that did not have an clock output . At the same time, their BAPASS pin voltage is 1.8v, while the working AD9516 BAPASS  pin voltage is 2.5V.

Could you give me some advice, please?

  • 0
    •  Analog Employees 
    on Apr 19, 2021 12:57 PM


    I took an AD9516-3 eval board and I plugged it in. I measured BYPASS pin as a continuous voltage at 2.5V.

    Then I created a configuration controlling a clock at REF1 pin. The PLL locked and created an output clock. I continued to measure 2.5V at BYPASS pin,

    There are many reasons why a board may not have an output clock. If you give me more details about the schematic, what clocks you apply at REFx pins and what clocks you want to create, you send me the register values you use and the initialization procedure you use, maybe we can find the reason why you measure 1.8V at BYPASS pin instead of 2.5V.