Using AD8055 as a non-inverting op-amp

Hi there!

I am using an AD8055 in a circuit. The IC is currently being used as an non-inverting op-amp as in figure 38, page 12, of  the AD8055 's datasheet. The input is from a tuned circuit (inductor and  capacitor in parallel) and is at 200kHz with the peak to peak voltage being  about 40mV. However, whenever the tuned circuit is connected to the op-amp, the  output of the op-amp quickly "saturates" (and oscillates between +/- 3V) with an  input voltage of only 40mV and a gain less than 10. Strangely enough, this  oscillation does not occur at low gains (about +3). However, I require the  op-amp to have a gain of about 100 eventually.

Could someone help me sort out this problem please?

Thanks for the help!

AD8055_8056.pdf
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    •  Analog Employees 
    on Aug 2, 2018 4:19 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
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  • 0
    •  Analog Employees 
    on Aug 2, 2018 4:19 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
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