"Scott Dorsey" wrote in message
...
Jim Hampton wrote:
Thanks for the tip, Carl. Geeze, Analog Devices. I should have
remembered.
It has been quite a few years since I worked in Materials Engineering and
actually had a feel for the current state of the art. Heck, I was only
off
by a factor of 10 on that clock rate! 10 percent is one thing, but by a
decade! LOL. Be grateful I didn't suggest wiring a bunch of 12AU7s
together in flip flops. Hmmm ... where'd I put that core memory anyways?
BTW, those 400 MHz devices are 10 cents per dozen, right?

All of the AD synthesizers I have seen have a microprocessor interface,
where they basically memory-map into a processor. I'd rather have
something
I can directly address.

I could probably pull out a 68HC11 to control the thing if I absolutely
had
to, but I'd rather have something I can just latch a BCD input into.
--scott

Modern DDS devices would require too many pins on the device for
cheap packages unless they used some sort of serial communications
or a modest pin count multiplexed bus.

I doubt that you will find anything useful with a straight binary or BCD
input because the devices need too many bits loaded into them to set
up all of the internal functions/registers.

Carl - wkc3