Hi All, FYI, I've now completed the hardware design for a simplified, compacted SM1000. Because it's intended to be used inside other equipment it does not have the power supplies or the isolated interfaces. In the end I kept the F4 and unless I have screwed up the pinning it should be binary compatible with the SM1000. Overall size is now 30 mm square, with double-sided assembly. It's aimed at hams who build their own rigs, not big radio manufacturers.
Schematics and a couple of pretty pics are on this EEVBlog post: http://www.eevblog.com/forum/rf-microwave/compact-variant-of-sm1000-digital-voice-adaptor-for-use-inside-equipment/ When I've got it finalised and generated the manufacturing files I will release it under the TAPR open hardware license like the SM1000. Unless anyone spots any major errors I will probably order some (bare) boards in the next week or so. I am happy to add some to my Chinese fab order if anyone else is interested. @ Rick Barnich and David Rowe, as the original designers I'm happy to populate and post a board if you're interested. Richard
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