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using AD8067 as inverting amplifier

Hi,

I tried to work with AD8067 operational amplifier as inverting amplifier. My input resistance is 12k ohm and feedback resistance is 10k ohm. Now gain should be less than one. I tried to simulate it in LTspice with spice model of AD8067 from analog device website. I got very weird result. The frequency increased and the output is like a beam. I am attaching the circuit and output curve here. Can anyone please help me to solve this problem?

Thank you.

Niloy

attachments.zip
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  • Hi Jino,

    Thanks for your reply. I want to connect AD8067 with a sensor that has a resistance value around 12k ohm or even higher. Now input resistance of that high and feedback resistance 1k ohm, I still get very high oscillation. I am attaching the output waveform here. I need my current in input side to increase by 10,000 times at output voltage signal. It looks like AD8067 does not allow me to do that. Can you suggest me one fast amplifier with high gain bandwidth (my signal freq is around 500k Hz) which meets my specification?

    Thanks.

    Niloy.

Reply
  • Hi Jino,

    Thanks for your reply. I want to connect AD8067 with a sensor that has a resistance value around 12k ohm or even higher. Now input resistance of that high and feedback resistance 1k ohm, I still get very high oscillation. I am attaching the output waveform here. I need my current in input side to increase by 10,000 times at output voltage signal. It looks like AD8067 does not allow me to do that. Can you suggest me one fast amplifier with high gain bandwidth (my signal freq is around 500k Hz) which meets my specification?

    Thanks.

    Niloy.

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