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LTC6244 Alternatives for peak detector

Hi All,

I started to work on a peak detector using LTC6244 and according to ADI app note (https://www.analog.com/en/technical-articles/ltc6244-high-speed-peak-detector.html). 

However, I don't have LTC6244 in my lab so I used another OpAmp - ADA4077 and because of that I don't have a peak detection output in my lab circuit nor in LTSPICE simulation...

We are in a special situation right now. You can order any part you want but  lead time ,lets say, is not a few days....

Why do I have this result? I guess it is because GBW product... am I right?

Do we have an alternative for this OpAmp?

Thanks and Regards, 

Shlomi