Murata has all of their passive component data on their website:
S parameter files (which show self resonant frequency)
Capacitance derating as a function of voltage (for capacitors)
I've found this to be a great resource.
On Tue, Oct 11, 2016 at 1:45 PM, Doug Ausmus <daus...@gmail.com> wrote:
> I didn't see anyone bring this up, and I'm not sure which dielectrics and
> types are being used, and at risk of stating what is likely trivially
> obvious to the electronics designers in this august group <g>, but when
> using MLCC and going to smaller size capacitors (X5R and X7R, others) don't
> forget to re-check the dielectric voltage-dependence curves. For your chip
> film caps, this is far less an issue.
> Here is some info and references, just in case some of your
> non-electronics designers want to check it out:
> Although this article is testing with higher valued caps, here's a nice
> graph showing how the smaller chip sizes increase this effect over larger
> (Figure 1 and Table 2)
> (From the following original article:)
> Most everyone is aware of the DC bias dielectric effects, but note that AC
> waveforms have some dielectric effects as well, but exert their effects in
> the opposite direction, to a point and are, of course, frequency dependent
> (I am not sure if these AC dielectric effects are also size-dependent or
> not, but it would be logical they might be):
> (PDF page 128, [doc page #127]... Figures 2, 3)
> On Sun, Oct 9, 2016 at 11:18 PM, Andrew Greenberg <a...@ece.pdx.edu> wrote:
>> > Are there any places where we need to be concerned about wattage?
>> Yep! There are two cases that we won't switch packages: one where
>> wattage is a problem (so far, no cases of this on the LGR board) and one
>> where the capacitance value is too high for an 0402 (anything greater
>> than about 1 uF). In these (and other cases I'm sure I missed) we'll
>> leave the larger packages. Other than that, the "jelly bean" parts can
>> be switched to 0402.
>> OK, everyone seems to agree it's a "go", so now OreSat's default package
>> size is now 0402. I think this makes sense.
>> Andrew Greenberg
>> Electrical and Computer Engineering
>> Portland State University
>> a...@ece.pdx.edu C: 503.708.7711
>> psas-avionics mailing list
> psas-avionics mailing list
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