Post Go back to editing

ADA4817 self-oscillation

Hi,

I use ada4817-1 and adg1414bcpz to convert current to voltage.

But the amplifier self-oscillate at frequency about 80MHz.

How can i cancel the unexpected frequency?

In attchment, ADA4817-1 convert current in DUT to voltage. ADG1414BCPZ used to

select feedback resistor to make gain variable.

ProtelSchematic.pdf
Parents
  • Hi jiangfux,

    Thank you for using ADI parts! I just need some more information about your setup to help you better.

    Are you seeing the oscillation at all feedback configurations? The usual reason for seeing oscillations from the part is due to capacitive loading. What load is the ADA4817 driving? Am I interpreting your circuit correctly that you are also using the ADG1414 to connect the output of the amplifier to your load?

    Thanks!

    Kris

Reply
  • Hi jiangfux,

    Thank you for using ADI parts! I just need some more information about your setup to help you better.

    Are you seeing the oscillation at all feedback configurations? The usual reason for seeing oscillations from the part is due to capacitive loading. What load is the ADA4817 driving? Am I interpreting your circuit correctly that you are also using the ADG1414 to connect the output of the amplifier to your load?

    Thanks!

    Kris

Children
No Data