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Re: [Discuss-gnuradio] SSRP ADC board finalized / production cost estima
Re: [Discuss-gnuradio] SSRP ADC board finalized / production cost estimates
Wed, 25 Aug 2004 23:32:23 -0500
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The board makes extensive use of surface mount components to minimize
cost and stray capacitance and inductance that might degrade
performance. Most passive components are 0603 surface mount parts, the
LTC1746 is a .5mm pitch 48 pin TSSOP and the THS4501 and LP2989 are
SO-8. All that might seem a little intimidating at first, but I've only
soldered SMT components on two previous projects and I have no problems
with these. Having a few key tools makes it very simple. I have a pair
of good non-magnetic tweezers, a syringe of RMA flux and some .015"
solder. I use a medium tip on my soldering iron for everything except
the TSSOP for which I have a "mini-wave" tip that costs about $20. I
find that after you get the hang of it, soldering SMT parts is quicker
and perhaps easier than their through hole counterparts. The production
boards have soldermask to minimize the chances of bridges and I will
seriously consider offering a board kit with the ICs already mounted.
My goal is for the SSRP to be accessable to a large number of people.
As it stands I'm basically selling everything at cost and I will for
sure offer an assembled version, its just that I don't have a terribly
large amount of time and I want to charge as little as possible.
Thanks for the interest so far, its very encouraging.
Krzysztof Kamieniecki wrote:
Great Job, David!
How tough will it be to assemble the board by hand?
David Carr wrote:
I ordered prototype pcbs for the SSRP LTC1746 board today. They
should be here in a little more than a week. If the initial bring up
goes well then I should have production boards shortly thereafter.
The SSRP LTC1746 ADC module can sample at up to 20Msps with 14 bits
of precision. It looks like production units will cost $60-70
unassembled or bare PCBs $15. The bare PCB option can be
considerably cheaper because an individual can request free samples
of the LTC1746 and THS4501 and save $25+. Assembled boards will be
available for additional cost. With the USB2 module running $89, and
the LTC1746 board ~$70, a user can get a 10Mhz bandwidth, 14 bit
radio peripheral for about $160. Not too bad I'd say.
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