OPA810: Large-Signal Frequency Response vs Output Voltage

Hello Jan,

Can you provide a schematic? How large is your input/output signal and what are your load conditions? What supplies are you using here?

Can you also clarify if this is only the case with your large-signal response? Or are you seeing a decrease in gain for small signal as well?

For the large signal response measurement, the OPA810 is also set in a buffer configuration along with a load condition of 1k-ohm and 4.7pF.

Best,

Hasan Babiker

Hi,

I use the OPA810 in a standard buffer configuration with an open load. So the load is infinite.

I see a decrease i gain not only for large-signals. I see the decrease for small signal as well. My inputs voltages reaches from a few milivolts to 3 volts.

My supply voltages are +5V and -5V. I used the bypass condesators like it is desciribed in the datasheet.

Do you think its a problem because i dont have a load?

Or the problem is the Osziloskop and the probe i use?

Thanks for your help,

Jan

Hi Kai,

thank you for your help. I inserted a load resistor at the output. Now i dont measure a damping in gain.

Thanks for your help.

Jan

You are welcome :-)

Kai