Has anybody any suggestions of max regulated frequency?
If I replace bottom resistor of feedback chain by digital=20
potentiometer and reduce output capacitor, what "max=20
frequency" very aprox could I send to digital potentiometer,=20
aiming at microstepping motor applications?
LM3485 can work at >1mhz.

   Thanks.
   Mike.

Matt Pobursky wrote:
> On Fri, 2 Aug 2002 21:30:08 +1200, Russell McMahon wrote:
> >Note the LM3485 costs $22 one off from =A0NatSemi - they don't really
> >want you to buy small quantities.
>=20
> That's not the one off chip price -- that's the price for Qty. 1 of
> their PS demo board for the chip.
>=20
> Doing a quick 'net search I couldn't find any in stock anywhere. If
> they are $.50USD@1K, then they are probably less than $1 in small
> quantities when they become available from a distributor like Digikey.
>=20
> Nice device. I'm going to request some samples and give them a spin.
>=20
> Matt Pobursky
> Maximum Performance Systems

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