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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    •  Analog Employees 
    on Nov 15, 2014 5:59 AM over 6 years ago

    Hi Niloy,

    As i read through the datasheet (page 13), I found out the error in your circuit is the value for feedback resistor. 1kohm is recommended as feedback rather than 10kohm.

    In your case, you can change your RF value to 1kohm and your RG to 1.2105kohm (1.21kohm as nearest standard value). I already tried it and its working fine.

    I hope this helps.

    Best Regards,

    Jino

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  • 0
    •  Analog Employees 
    on Nov 15, 2014 5:59 AM over 6 years ago

    Hi Niloy,

    As i read through the datasheet (page 13), I found out the error in your circuit is the value for feedback resistor. 1kohm is recommended as feedback rather than 10kohm.

    In your case, you can change your RF value to 1kohm and your RG to 1.2105kohm (1.21kohm as nearest standard value). I already tried it and its working fine.

    I hope this helps.

    Best Regards,

    Jino

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