Matched transtr array to replace 2n3904/06 ??

I'm tired of trying to match these babies. They are called for a lot in diy synth modules (VCA, VCF, etc..)

Is there a matched transistor array (2 or 2x2) for the 2n3904/3906 combo ?....readily available ?


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I don´t know if it have the same hfe but you can check it.
http://www.analog.com/en/Search/productSearch.asp?queryText=ssm&la=English&reqPg=1

ssm2210 and ssm2220

http://www.diodes.com/datasheets/ds30311.pdf
http://www.diodes.com/datasheets/ds30312.pdf

But get out the magnifying glass, since they are in STO-363 packages!

Thanks guys.


DMMT3904W/3906W (just what the doctr ordered*)
MAT-02/03
SSM2110/2220
EN2016 (very little info)
LM394/194
THAT340P (looks interesting - 2 npn +2 pnp)
http://users.ece.gatech.edu/~lanterma/sdiy/datasheets/transistors/that300data.pdf

I also found the CA3096A possibility...5 transistors total.
http://users.ece.gatech.edu/~lanterma/sdiy/datasheets/transistors/CA3096.pdf

(* to keep his optometrist friend happy)

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[quote author="BradAvenson"]http://www.diodes.com/datasheets/ds30311.pdf
http://www.diodes.com/datasheets/ds30312.pdf

But get out the magnifying glass, since they are in STO-363 packages![/quote]

Philips also make these. They are not monolithic pairs but rather chips plucked from adjacent positions of the wafer. Note that the guaranteed matches in Vce and Vbe pertain somewhat indirectly to the values we tend to be interested in, namely base-emitter voltage in a typical circuit, operating away from saturation. But they are probably pretty well-matched in those cases as well.

I asked the Diodes Inc. guy what the breakdown voltage was, chip to chip. He said Oh well it's unlimited---they're not on the same die. I said "So I can apply a megavolt?"

He thought about it, began to understand what I was driving at, and finally said he had no idea. And I admit in most circuits it would be of no consequence. But I suspect they would withstand maybe a kilovolt short-term and a couple hundred volts indefinitely, which could be useful in some applications.

Those can all work, and most of those have been used for this quite abit. I assume you are talking expo converters and ladder filter work. The MAT-02 is great in expo converter duty, as is the LM394. The MAT-04 is great for ladder filters and the Arp 2600 lowpass. Arp and Moog both used the CA3046/86/96 for matched transistor duty. Lots of refrences out there. But alot of the matched transistors and transistor arrays we have used over the years have been discontinued. The MAT-02 and LM394 seem like the best bets for new designs, but buying a couple hundred 3904s/3906s and matching them is probably the best way to go if you feel like planning ahead. Alot cheaper too, for the cost of a few MAT-02s or LM394s you can have a lifetime supply of matched pairs.

When I went and did this a few years back, they were all pretty good and close to match, ended up with about half all the same and the other half seperated into two values. They are getting pretty good at making these things.

adam