The slew rate seems a bit slow on AD8047 (750 V/µs VS 1100 V/µs). A great (but expensive) AOP with really nice specs is the LT1227 from Linear. But I'm not a time guru and perhaps there is some tricks that I'm not aware of. For a distribution amplifier designed to share an accurate 10 MHz sine wave (and perhaps a 5 Mhz square wave), what are the most important specs to look at ?
-----Message d'origine----- De : [email protected] [mailto:[email protected]] De la part de Yuri Ostry Envoyé : lundi 6 avril 2009 17:29 À : Discussion of precise time and frequency measurement Objet : Re: [time-nuts] Replacement High-Speed AOP for Distribution Amplifier Hello, Monday, April 6, 2009, 17:59:49, Samuel D. wrote: S> Hi there, S> I'm working on a new GPS-Disciplined Rubidium Frequency Standard and I'm now S> designing the distribution amplifier stage. There is many schematics S> everywhere on the Internet, the most famous is the TADD-1 reviewed by the S> not-less-famous TVB. Almost all of them use high-speed Op Amps originally S> designed for video processing. The most common AOP are the MAX477 (used in S> TADD-1) and the MAX4135. Unfortunately, both of them are now obsolete and S> will be discontinued soon. I checked Digikey and Farnell, but those parts S> are not available anymore, so, I'm looking for an equivalent (or better!) S> replacement. S> Any hints ? Check current Analog Devices opamps offers. There is some pin to pin replacement for MAX477. If memory serves me corectly, it is AD8047 (I may be wrong, though, check datasheets). -- Best regards, Yuri mailto:[email protected] _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
