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remember the max038?

A

apchar

Jan 1, 1970
0
Maxim used to make a neat little 1 chip 20MHz waveform generator, the
MAX038. But, as the twits at Maxim like to do, they stopped making
them and the usual distributors don't carry them anymore. Googling
doesn't help. I just get links to outfits like zdi or icplus that
won't sell you less than $250 worth and only cater to businesses. Does
anyone know where I can find a couple of these chips??
Thanks
 
W

Werty

Jan 1, 1970
0
I agree , they are forcing us to ARM mcu's

BUT gotta use more circuitry .
---------------------
I love the 038 , but now we must do it all

with a ARM mcu , using DDS .

Its a ROM , that is read into a DAC .

It will do very hi freq .

An old 4MB PCI Video Card is a way

to make waveforms . Its DAC is very hi speed .

BTW Im doin ARM mcu . Ill be writting
s/w and a new Loader .
Ill make it much easier to debug .
I have many ARM EVB's and Game-boxes
to hack the ARM mcu's inside .

The most exciting is the $150 Nintendo DS Lite

it has 2 ARMs , 2 LCD color , 2 ports ...

I just bought a hack tool called a M3-Simply
to load homebrew s/w to the DS lite .

Next i'll hook a 2.5" HDD to slot-2 .
Its easy , no glue , only wires and
a free s/w , from WWW .
 
M

Michael Black

Jan 1, 1970
0
apchar" ([email protected]) said:
Maxim used to make a neat little 1 chip 20MHz waveform generator, the
MAX038. But, as the twits at Maxim like to do, they stopped making
them and the usual distributors don't carry them anymore. Googling
doesn't help. I just get links to outfits like zdi or icplus that
won't sell you less than $250 worth and only cater to businesses. Does
anyone know where I can find a couple of these chips??
Thanks
Actually, some of us remember the Intersil 8038 that came out in the early
seventies, and had something like a 1MHz upper limit. That's a long time ago.

The Maxim version just added to that, the upper frequency limit and the
lifespan of the basic concept.

Michael
 
J

Joel Kolstad

Jan 1, 1970
0
Werty said:
with a ARM mcu , using DDS .
An old 4MB PCI Video Card is a way
to make waveforms . Its DAC is very hi speed .

Yes, but a DDS normally lets you monkey around with phase and amplitude shifts
in "real time" (i.e., it has a phase offset adder and an output multiplier),
whereas doing this with a video card would require that *you* provide the
hardware or software to do so. For completely fixed waveforms, I would agree
that a video card can make a fine device if you already have a PC lying around
anyway to drive it.

If you don't like monolithic DDS ICs, a better approach is to just "roll our
own" inside of an FPGA along with a discrete DAC. You won't get the speed as
the fastest DDS ICs available, but it may still be fast enough for your needs.
 
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