bigmoose wrote:Very, very nice! I take it you routed the board and can get all the traces off pins 1-22 of the LTC chip? The ones close to the edge of your board.
bigmoose wrote:I like how you are getting rid of the heat. We have only 3 options, convect it with air; conduct it with liquids or conduct it into structure. When you get small in electronics, heat is the problem. Just like fuel cooled avionics in high performance aircraft, the heat has to go somewhere or you are toast.
bigmoose wrote:The one thing I don't like about the LTC part is if you re-power it, it resumes the factory default until you reprogram it. I heard there was a potential dash number revision being considered that would read state information from an eeprom... but don't know for sure it will be introduced. I also wish the pins were on 1mm intervals in lieu of the 0.5mm.
bigmoose wrote:Just an aside from a micro problem I was asked to trouble shoot last week. They had a clock line 6 inches long with a bifurcation about 4 inches in with 7 nS edges on the waveforms. Were getting reflections off the impedance change in the trace so I had them add series termination impedance (my favorite 10 ohm resistor) to the clock and data lines. It damped the jitter. Might be worth considering laying down two 0805 pads with the trace through them, so if there is a problem you can scratch cut the trace and add the resistor for the clock and data lines, unless your design has them slowed and shaped through an optoisolator.
methods wrote:The first part of the build is going brilliantly!
* precision references working (though bugger the A-hole who decided a Tant cap would have the stripe on the Pos!)
methods = living the dream.
bigmoose wrote:* Tants make a nice pop, flash bang when you put them in backwards! It's like the 4th of July!
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