LTC6268
Recommended for New Designs
The LTC6268/LTC6269 is a single/dual 500MHz FET-input operational amplifier with extremely low input bias current and low input capacitance. It also features...
Datasheet
LTC6268 on Analog.com
Would a LTSpice noise simulation of the LTC6268 spice model accurately model the output noise of the device? Or are there missing elements to in the spice model required for an accurate noise analysis and I would be better off doing the calculation by hand?
My question is more about the spice model and less about LTSpice but here is my LTSpice circuit for reference:
Hello mspalluzzi,
I have done some noise simulations using the model and here are the results that I've obtained: 
For the voltage noise, at frequencies less than about 60kHz, there is an observable difference between the simulated voltage noise vs. the actual voltage noise on the part's data sheet. On the other hand, at f > 60kHz, the simulated voltage noise density plot closely matches the actual plot.
For the current noise, at frequencies below 10MHz, the simulated current noise closely matches the actual data from the data sheet. However, for f >10MHz, there is an observable difference between the simulated data and actual data.
Based on the results above, I think you can still run some noise simulations, but I would also recommend correlating the simulated data with the calculated data and actual measured data.
Best regards,
Paul
