SI5328
In my opinion the SI 5328 is worth looking at for time nut application, like offset frequency. My problem is solder ability. Does any one know a source for an evaluation board or as an alternative a source that would do a small volume assembly?
Bert Kehren
Bert,
please look at the following manual:
https://www.silabs.com/documents/public/user-guides/Si5328EVB.pdf
Chris
Am 22.01.2018 um 12:34 schrieb ew via time-nuts:
In my opinion the SI 5328 is worth looking at for time nut application, like offset frequency. My problem is solder ability. Does any one know a source for an evaluation board or as an alternative a source that would do a small volume assembly?
Bert Kehren
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Hello,
here you can find the source of the development board with the Silicon
price and the neccessary software package:
https://www.silabs.com/products/development-tools/timing/clock/si5328-evb-development-kit
Chris
Am 22.01.2018 um 12:34 schrieb ew via time-nuts:
In my opinion the SI 5328 is worth looking at for time nut application, like offset frequency. My problem is solder ability. Does any one know a source for an evaluation board or as an alternative a source that would do a small volume assembly?
Bert Kehren
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On Mon, Jan 22, 2018 at 4:34 AM, ew via time-nuts time-nuts@febo.com
wrote:
In my opinion the SI 5328 is worth looking at for time nut application,
like offset frequency. My problem is solder ability. Does any one know a
source for an evaluation board or as an alternative a source that would do
a small volume assembly?
Bert Kehren
There is a development board. It is about $200. Search for SI5328-EVB from
the usual places.
https://octopart.com/search?q=si5328-evb&start=0
You can download the support software and try it out ahead of time from
here:
https://www.silabs.com/products/development-tools/timing/clock/si5328-evb-development-kit
There have been several discussions about it as part of Leo Bodanar's
GPSDOs. Search the recent archives of this list:
https://www.mail-archive.com/search?l=time-nuts%40febo.com&q=si5328
Mark
It might be possible to hand solder the 36-pin 0.5mm pitch QFN to this Schmartboard product:
http://schmartboard.com/schmartboard-ez-qfn-36-pins-5mm-pitch-32-pins-65mm-pitch-2-x-2-grid-202-0043-01/
One question is would the die attach pad, which apparently needs grounding, get enough heat sinking.
Bob L.
Sent: Monday, January 22, 2018 at 6:34 AM
From: "ew via time-nuts" time-nuts@febo.com
To: time-nuts@febo.com
Subject: [time-nuts] SI5328
In my opinion the SI 5328 is worth looking at for time nut application, like offset frequency. My problem is solder ability. Does any one know a source for an evaluation board or as an alternative a source that would do a small volume assembly?
Bert Kehren
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
Hoi Bert,
On Mon, 22 Jan 2018 06:34:42 -0500
ew via time-nuts time-nuts@febo.com wrote:
In my opinion the SI 5328 is worth looking at for time nut application, like
offset frequency. My problem is solder ability. Does any one know a source
for an evaluation board or as an alternative a source that would do a small
volume assembly?
As others have written, an eval board is available.
There are many small volume assmebly houses available. But the problem
is that you will have setup costs in the order of at least 100-300€,
even if you go to China. So, producing lots of less than 10 is not economical,
probably should aim for 100.
Attila Kinali
--
It is upon moral qualities that a society is ultimately founded. All
the prosperity and technological sophistication in the world is of no
use without that foundation.
-- Miss Matheson, The Diamond Age, Neil Stephenson
There are many small volume assmebly houses available. But the problem
is that you will have setup costs in the order of at least 100-300€,
even if you go to China. So, producing lots of less than 10 is not economical,
probably should aim for 100.
I recently ran across MacroFab (https://macrofab.com/), who can do small
orders (quantity: 1) of boards, assembled, for what seems like
reasonable prices. I haven't actually used them, but I did run a recent
board through their process (except for actually ordering), and they
came out with a price of ~$170 for a board that cost me ~$100 to
assemble myself ($35 for board, ~$65 for BoM), so that's not too bad. I
imagine the numbers would be smaller for simpler boards (this one is ~80
components and pretty big -- 110mm x 60mm). The price came down pretty
quick for quantity 3 or 5 or 10, though I don't remember the specifics.
The downside being that you have to be able to upload part-placement
info that is actually correct. Most layout programs don't seem to have
an issue generating it, though -- I just uploaded my gerbers and my
KiCad PCB file and it just ran with it.
FWIW, it's not that hard to do even fine-pitch SMD stuff onesself.
There's a little bit of startup cost (you really want to build a proper
reflow toaster), but with high quality PCBs available via OSHPark (and
fast! My four layer board was ~10 days), and quality stencils
available via OSHStencils, doing even fine-pitch SMD work at home is
surprisingly easy. In most simple cases, you don't even need the stencils...
-j