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SM Diode

P

Phil

Jan 1, 1970
0
I am looking for a small signal diode
in surface mount, is there any smaller
than SOD110 ?
current and voltage are not a problem
just size, I would like similar to 0402
in size if possible.
Anyone help?

Phil
 
J

John Larkin

Jan 1, 1970
0
I am looking for a small signal diode
in surface mount, is there any smaller
than SOD110 ?
current and voltage are not a problem
just size, I would like similar to 0402
in size if possible.
Anyone help?

Phil

http://www.skyworksinc.com/products_display_item.asp?did=798


The SC-79 is pretty small; I think other people make this package,
too. The LGA is smaller, but looks nasty to solder.

SMS7621-079 is about the lowest capacitance packaged diode around...
measures about 0.22 pF at zero bias.

John
 
I

Ian Buckner

Jan 1, 1970
0
John Larkin said:
http://www.skyworksinc.com/products_display_item.asp?did=798


The SC-79 is pretty small; I think other people make this package,
too. The LGA is smaller, but looks nasty to solder.

SMS7621-079 is about the lowest capacitance packaged diode around...
measures about 0.22 pF at zero bias.

John
If you want to get _really_ silly, the HSCH53XX beam-lead Schottky's
are 0.7 by 0.25 mm. Don't try hand soldering these after too much
coffee!
The 5310/5330/5340's are 0.1pF at zero bias.

Regards
Ian
 
J

John Larkin

Jan 1, 1970
0
If you want to get _really_ silly, the HSCH53XX beam-lead Schottky's
are 0.7 by 0.25 mm. Don't try hand soldering these after too much
coffee!
The 5310/5330/5340's are 0.1pF at zero bias.

Regards
Ian

Can you solder a beam lead part? I think regular solder will just
dissolve the beams. I have a sample of an old HP beamlead diode, but
it's so small it's really hard to find in its carrier.

You can get chip schottkies down to about 0.04 pF, but they have to be
wire bonded.

John
 
I

Ian Buckner

Jan 1, 1970
0
John Larkin said:
Can you solder a beam lead part? I think regular solder will just
dissolve the beams. I have a sample of an old HP beamlead diode, but
it's so small it's really hard to find in its carrier.

You can get chip schottkies down to about 0.04 pF, but they have to be
wire bonded.

John

Sure, you just need a steady hand, a magnifier, a fine tip
soldering iron and _lots_ of antistatic precautions. The
recommended method is eutectic bonding, but for
breadboarding it works (with a little practice). I was
using silver loaded solder to avoid leaching the lands on
the thick film substrate, don't know if that helped.
I really needed that <0.1pF capacitance to keep the
bandwidth above 20MHz...

Regards
Ian
 
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