SPICE model of AD8657

Hi Akira,

I had a quick run of AD8657 and AD824 DC parameters on LTSPICE, both offset voltage are within the datasheet spec which is 350uV for AD8657 and 100uV for AD824.

Please see below for my test setup and simulation results.

We usually model and characterize the amplifiers on the highest supplies available on the spec table. I recommend using +/- 9V on AD8657 and +/-2.5V on AD824.

Please try this on your simulation and let me know if we get the same results.

Best Regards,

Dann

Hi Akira,

I had a quick run of AD8657 and AD824 DC parameters on LTSPICE, both offset voltage are within the datasheet spec which is 350uV for AD8657 and 100uV for AD824.

Please see below for my test setup and simulation results.

We usually model and characterize the amplifiers on the highest supplies available on the spec table. I recommend using +/- 9V on AD8657 and +/-2.5V on AD824.

Please try this on your simulation and let me know if we get the same results.

Best Regards,

Dann

Hi Dann,

Thank you for your answer. I confirmed it and got the same results.

Thanks & regards,

Akira

Sorry, it's late.

If I take +5V and -5V for power then i get -19.053629mV

Is this O.K.?

Best regards

Fritz2

Hello Fritz2,

Please refer to the following questions:
1. Did you also used AD8657?
2. Is -19.053629mV the input offset voltage that you have measured?
3. How did you measure the input offset voltage? Do you have a schematic that you can share?

Having the above data will surely help us proceed with your question. Thank you very much.

Best regards,
Paul