Use an LTC6957 the CMOS output of which has its PN specified at frequencies up to 300MHz.
Virtually any discrete circuit replacement with similar performance will require a higher voltage and dissipate more power. Bruce > > On 31 July 2017 at 09:25 Attila Kinali <[email protected]> wrote: > > On Sun, 30 Jul 2017 23:52:50 +0300 > Yuri Ostry <[email protected]> wrote: > > > > > > But interfacing of 74ALVC flip-flop input to a ADF output in a > > 160-260 MHz > > range is not so easy question for me, especially taking low jitter > > requirements into account. Maybe someone can share tested working > > solution that > > will not add too much noise and will be more or less stable with > > temperature variations? > > > > > > CMOS signals get a bit iffy when going over 100MHz. You will probably > have to build your own board for the divider. I don't think it would > be reliable without it. As for interfacing the ADF4350 output, you will > need to use the differential output to cross the board-to-board gap. > On the divider board use a differential pair to convert the signal > to proper CMOS levels. You can use the one in the TADD2 or TICC > as an example how to do it. Make sure the f_t of the transistors > is high enough and that you give them enough current to work with. > Keep all wires on the divider board short and remove all planes > underneath the circuit, safe for the (closed) ground plane on the > bottom layer, in order to minimize stray capacitance. > > Alternatively, use something like an SY89874 as first divider > stage to get down to a more managable frequency range, then > continue with your ALVC dividers. > > Attila Kinali > > -- > You know, the very powerful and the very stupid have one thing in common. > They don't alters their views to fit the facts, they alter the facts to > fit the views, which can be uncomfortable if you happen to be one of the > facts that needs altering. -- The Doctor > > _______________________________________________ > 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.
