Ceramic SMD caps for filtering

[trodas]

To futher clean up the RMS ripple of any spikes (usually hi-frequency ones) is used on all mobos ceramic caps with relatively little capacitance, yet that is exactly why they filter the spikes out well. Sometimes it is not just about the spikes, sometimes there are a bit higher capacity, like the ceramic caps into DFI LP B/Ultra Infínity CPU socket (into and bellow) are 5,3uF ones (at least what I measured on the one I soldered off and on again), while in general is wise to bridge the big caps on mobo with about 47nF ones.

Now what do I ask about?
Simple thing.
Recommended manufacturer for hi-quality ceramic caps.

I already got a few types of very good electrolyte caps, like Samxon GA, Nichicon HZ, Rubycon MCZ,Chemi-con KZJ, Samxon GC, Nichicon HN or Panasonic FM ones, but I'm clueless about the ceramic ones.

Anyone can give me a hint, when looking for the best quality (lowest ESR, ESR)? Thanks

[trodas]

Re: Ceramic SMD caps for filtering

For the filtering - ATM I come up with this:

- Panasonic 10uF 16V ECG X5R -55°C to +85°C size 1210 (3.2 x 2.5 x 0.85/2.0/2.5)
ECJ-4YB1C106K

- Panasonic 5.6uF 6.3V ECG X5R -55°C to +85°C size 1206 (3.2 x 1.6 x 0.85/1.15/1.6)
ECJ-3YB0J565K

- Panasonic 100nF 16V ECG X7R -55°C to +125°C size 1206 (3.2 x 1.6 x 0.85/1.15/1.6)
ECJ-3VB1C104K

10uF caps in ceramic pack great ESR/ESL values and there are a lot's of them missing on the mobo.

5.6uF is the size of caps missing bellow the CPU socket and probably the ones that should be inside the CPU socket as all. Total - 8 missing ones.

100nF is the one I picked up to do the filtering. The 47nF capacity aren't big enought - only 2mm long, this won't be possible to solder between the legs of every bigger cap found on this board.

What do you think, acceptable?

Specs:

[MD Willington]

Re: Ceramic SMD caps for filtering

Kind of like this?



Geode NX developement board, no electrolytics near the processor.

[trodas]

Re: Ceramic SMD caps for filtering

MD Willington - whoa! Nice mobo
And no, nope. I mean bypassing every major electrolyt cap on the whole mobo with 100nF ceramic cap to filter the hi-frequency stuff the DFI LP B is infamous to generate away!
That way I could:
a) increase overclock
b) save my caps from failing again

...at least I hope for this things

[willawake]

Re: Ceramic SMD caps for filtering

or Iwill DK88 dual opteron. thats what you need for folding, trodas





http://www.iwill.net/product_2.asp?p_id=102&sp=Y

[MD Willington]

Re: Ceramic SMD caps for filtering

That's beautiful willawake...

[Spacedye69]

Re: Ceramic SMD caps for filtering

It made me cry.... Im in love

[MD Willington]

Re: Ceramic SMD caps for filtering

I think lust is a better term.

[gg1978]

Re: Ceramic SMD caps for filtering

That dual motherboard is beautiful.. Then again, the Quad Opty motherboards are even more so..

[PeteS in CA]

Re: Ceramic SMD caps for filtering

Some of the leading MLCC mfrs are: AVX, Kemet, Murata, Panasonic Taiyo Yuden, Vishay/Vitramon. Stick with X7R, which designates the temperature coefficient. Coefficients such as X5R, Y5V, or Z5U may change 35% or more if the ambient temperature goes up to 50C or higher. You really shouldn't hand solder case sizes much larger than 1210. The thermal gradient from one end of the cap to the other during soldering can cause cracking after the cap cools. Pre-heating the part with a heat gun or hair dryer may lessen this problem. Also, make sure the MB doesn't get bowed when installed in the case. Mechanical stress can crack large form-factor MLCCs. If an MLCC cracks, it will short, and in some cases fry a hole in the PCB.

[willawake]

Re: Ceramic SMD caps for filtering

It made me cry.... Im in love

at $649.99 it makes everybody cry.

[trodas]

Re: Ceramic SMD caps for filtering

willawake - 64G ram Dual Opteron No Electrolyte caps. No fan. Simply
Don't post thing like this, please

Let's stick with the subject!

PeteS in CA - thanks for the suggestions! And I would love to stick with the Panasonic X7R, however the others aren't awailable. Do you know any other online shop (could be even US-one, I like to believe that the guy who say he can repost me the caps do the job - he live in CA as you ) that has more SMD ceramic caps that digi-key? They have the 100nF 16V ones in X7R, witch is good, but the 5.6uF 6.3V ones did not have at all and the 10uF 16V only in X5R, witch as you well explained, have the tolerance far worser. But hey - there are 8 cases, where such caps are simply missing. So, adding anything is better that nothing, right?
And you are right - I should handle the mobo more cerefully now, no bending!
And I pomise I did not solder anything larger that 1210
The pre-heating idea sounds interesting, but is not this a bit overkill? The thing sure has some heat-conductivity, so it heat-up whole and not just a part of it. Besides, I already solder them - I have to desolder one from the back of the CPU socket to measure it and solder it back.
The soldering was very quick and easy. That is why I want these

So, any shop you know does exist?

[PeteS in CA]

Re: Ceramic SMD caps for filtering

The pre-heating idea sounds interesting, but is not this a bit overkill? The thing sure has some heat-conductivity, so it heat-up whole and not just a part of it.

I've had very unpleasant experiences with large form factor MLCCs cracking, though mostly due to PCB bowing. I would go through the trouble were it my system, but it's your system ...

When I look at AVX, Murata, and TDK (forgot to mention them) MLCCs in the Digi-Key catalog, I found that all three have 1uF, 16V, X7R caps in an 0805 package, and AVX and TDK have 2.2uF, 16V, X7R caps in an 0805 package. Hand-soldering an 0805 should be reasonably safe. In a 1206 package, you can find 10uF from TDK or Kemet.

[trodas]

Re: Ceramic SMD caps for filtering

With specs comparable to the Philips X7R...?
That would be great. And the 5.6uF?

But I need (must be...) in the 1206 package.

Could you pls post the Digi-key article numbers?

[trodas]

Re: Ceramic SMD caps for filtering

PeteS in CA - hmmm, a little help there, please?
I can't find anything from TDK for the 10uF 16V and 5.6uF 6.3V ratings
(even I did not limit the search for the necesary 1206 package)

Anyway, it looks like the X7R ratings for ceramic caps are global thing? I mean - that also other companies use the same rating? That would be great!

I looking now for the other brands you mention...

[trodas]

Re: Ceramic SMD caps for filtering

PS. I managed to find Murata 10uF 16V 1206 X7R caps, hoooray:
490-3911-1-ND

...however no result from finding anything around 5.6uF 6.3/4V in 1206 or 1210 packaging and X7R specs...

Help?

[trodas]

Re: Ceramic SMD caps for filtering

Ha!

As for the 10uF 16V caps, I found these in the X7R stuff:

- Murata 10uF 16V X7R 1206
490-3911-1-ND

...and as for the 5.6uF 6.3V (or lover) ones, the best I find is this:

- Taiyo Yuden 4.7uF 10V X7R 1206
587-1332-1-ND

They are smaller, but they are not "general use", but low ESR marked, witch is better, even they are 10V ones, witch is far too much for Vcore filtering bellow and in the socket...

[PeteS in CA]

Re: Ceramic SMD caps for filtering

Kemet:
1uF @ 16V, X7R, 0805 D-K P/N 399-1294-1-ND
2.2uF @ 16V, X7R, 0805 D-K P/N 399-3523-1-ND

10uF @ 16V, X7R, 1206 D-K P/N 399-3525-1-ND

Murata:
1uF @ 16V, X7R, 0805 D-K P/N 490-1691-1-ND

TDK:
1uF @ 16V, X7R, 0805 D-K P/N 445-1358-1-ND
2.2uF @ 16V, X7R, 0805 D-K P/N 445-1420-1-ND

10uF @ 16V, X7R, 1206 D-K P/N 445-1601-1-ND

Not sure why you want 5.6uF @ 6.3V when you can get 10uF @ 16V in the same package. I think you'll find 5.6uF much less common than 4.7uF.

[trodas]

Re: Ceramic SMD caps for filtering

Well, because the caps bellow the DFI LP B CPU socket are 5.7uF ones. Well, the one I desoldered and soldered back was 5.3uF, but 5.6uF it is

And I don't think that bigger is always better. IIRC if the cap is small-enought it filter better hi-frequency spikes. So the 4.7uF ones are IMHO the best deal

Now I just want desperately to get 'em and solder them there

[willawake]

Re: Ceramic SMD caps for filtering

the day trodas is happy with his overclock, i will retire