ADM7151 oscillation

Hi,

I'm using the ADM7151 to supply a PLL/VCO.  It is to be supplied w/ 5V input and give 3.3V output.  See my schematic below.  However the output is actually going to ~4V @ Vin=4.5V, and 4.3V @ Vin=5V.  It's also oscillating badly.  I noticed that my schematic omitted CREF which is in the datasheet as 1uF.  Do you expect this would cause the oscillation and the voltage error?

Thanks

Parents
  • 0
    •  Analog Employees 
    on Aug 2, 2018 3:23 PM
    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,
    EZ Admin
Reply
  • 0
    •  Analog Employees 
    on Aug 2, 2018 3:23 PM
    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,
    EZ Admin
Children
No Data