[time-nuts] LT1016 as a pulse shaper...

Mark Goldberg marklgoldberg at gmail.com
Sat Mar 3 12:55:17 EST 2018


Search for ultra fast comparator yields TL3016 and AD8611, claims to be
faster pin compatible replacements.  I have found low parasitic capacitance
on the outputs of these types of comparators is important, and I have used
balanced hysteresis (use positive feedback from both + and - outputs). I
haven't needed jitter lower than 10 ns or so, with awful inputs, so have
not optimized for lower jitter.

Search google for "ultra fast comparator" and several turn up that are in
the low ns or hundreds of ps range for prop delay. ADCMP566, TL3116,
LMH7322, LTC6752, MAX9691 turn up among others. I haven't investigated or
used any of them.

Regards,

Mark Goldberg




On Sat, Mar 3, 2018 at 10:08 AM, Ulf Kylenfall via time-nuts <
time-nuts at febo.com> wrote:

>
> Gentlemen,
> I have so far been using LT1016 as a pulse shaper and also whenever I
> needed toconvert a sine wave into TTL Logic levels. Some hysteresis and all
> the decouplingand layout precautions as recommended by LT.
> Are there any similar or better alternatives out there that could be
> usedthat would provide lower jitter and that are less expenceive?
> Ulf Kylenfall
> SM6GXV
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