Amplifying voltage from an inductor

I have a primary inductor connected to a voltage source with frequencies varying from 100kHz to 15MHz. This primary inductor induces a voltage across a secondary inductor via coupling and I want to amplify that induced voltage and put it through an ADC.

I can do this voltage amplification easily enough with an ideal op amp in non-inverting configuration simulated in LTspice. The two figures below are the schematic and simulation results for the ideal op amp.

However as soon as I simulate it with a real world model op amp like the LT1818 I get some nasty oscillations on the input node of the op amp which also results in oscillations of the output node. These oscillations always appear even when I vary the frequency in the primary voltage source. I understand that it's probably related to the phase margin of the op amp and the inductive input, but I don't know how to fix it. The two figures below are the schematic and simulation results for LT1818.

How do I get rid of these oscillations? I have tried another op amp like the LM6172 and I also get similar results. I was also wondering if there is a better way to read the voltage out of a coupled inductor?

Thanks!

• You realize most ADCs can't accept bipolar voltages, right? Did you use decoupling caps? Increase the values of your resistors by 5x or 10x so you don't load down your opamp so much. Jan 22 '20 at 2:32
• Sorry I don't understand what do you mean by bipolar voltages? I do plan on feeding the output to a fully differential amplifier LMH6552 and then feed the output of that into ADC12040 Jan 23 '20 at 1:27
• By bipolar I mean voltages that go both above and below zero volts. A differential amplifier also cannot necessarily accept bipolar voltages. An amplifier with two differential inputs where each inputs can go from 0 to 5V is still unipolar. Differential just means the two inputs can go above and below each other, not necessarily zero. In your case, your diff amp can, but then the voltage it outputs is still bipolar which your unipolar ADC cannot accept unless it is given an offset in some way so it is unipolar which I think you can do by applying a bias to one amp input but you should verify Jan 23 '20 at 1:31
• ahh I see! Thank you. I'll be double checking that :) Jan 23 '20 at 4:07