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funkyfarm
Joined: Jan 21, 2007
Posts: 583
Location: France
Audio files: 3
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 Posted: Mon May 21, 2007 4:20 pm Post subject:
NPN/PNP Transistor array
Subject description: and matched transistors... |
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SSM2210 is an Audio Dual Matched NPN Transistor
SSM2220 is an Audio Dual Matched PNP Transistor
CA3046 is a cheaper NPN Transistor Array, General Purpose.
i can't find any PNP equivalent...
in fact, I was wondering if there's any modern equivalent to CA3096, which is three NPN and two indepandant PNP transistors in one package.
http://www.banzai-effects.de/CA-types-c-541.html
At least, i guess i don't understand the difference between "matched transistors" and "transistor array"... |
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mediatechnology
Joined: May 10, 2006
Posts: 80
Location: Oak Cliff, Texas USA
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| Posted: Mon May 21, 2007 8:01 pm Post subject:
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The THAT340 has both a pair of NPNs and a pair of PNPs.
See: http://www.thatcorp.com/300desc.html
I stock the 300 and 320 and just got some 340 samples in today. |
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ickystay
Joined: Nov 15, 2006
Posts: 143
Location: Oregon
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| Posted: Mon May 21, 2007 10:16 pm Post subject:
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| The MPQ3906 is a quad PNP. I have no idea how closely matched the individual units may be. |
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yusynth
Joined: Nov 24, 2005
Posts: 1314
Location: France
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Posted: Tue May 22, 2007 4:35 am Post subject:
Re: NPN/PNP Transistor array
Subject description: and matched transistors... |
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| funkyfarm wrote: | | in fact, I was wondering if there's any modern equivalent to CA3096[/url], which is three NPN and two indepandant PNP transistors in one package. |
There is one, its the HFA3096 but you'll find it only in SMD package, and living in France you'll have difficulties finding them. Two years ago I tried to buy some from the european distributors but eventually forgot about it because for some obscure reasons (US administration) I had to certify that I did not intend to build some rockets or booby trap with it... I found that humiliating and stopped the process.
| funkyfarm wrote: | | At least, i guess i don't understand the difference between "matched transistors" and "transistor array"... |
Matched transistors means that the transistors on the chip have the very same characteristics (VBE matched to 1mV tolerance for a fixed collector
current).
Transistor array, is a chip with many transistors of the same brand but which characteristics may vary with minimum a tolerance of 10mV
_________________
Yves |
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State Machine
Janitor
Joined: Apr 17, 2006
Posts: 2810
Location: New York
Audio files: 24
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| Posted: Tue May 22, 2007 5:27 pm Post subject:
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| Quote: | | I stock the 300 and 320 and just got some 340 samples in today. |
Are we subject to the minimum order requirements 
Thanks for the post,
Bill
[/quote] |
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mediatechnology
Joined: May 10, 2006
Posts: 80
Location: Oak Cliff, Texas USA
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| Posted: Thu May 24, 2007 4:41 am Post subject:
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No minimum order requirements on THAT Products from me.
From THAT direct the MOQ is a single tube which on that part is 25 pcs. |
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Scott Stites
Janitor
Joined: Dec 23, 2005
Posts: 4127
Location: Mount Hope, KS USA
Audio files: 96
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| Posted: Thu May 24, 2007 11:05 am Post subject:
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| Mediatechnology has some very cool stuff there..... |
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Freq Band
Joined: Sep 05, 2006
Posts: 57
Location: Los Angeles
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State Machine
Janitor
Joined: Apr 17, 2006
Posts: 2810
Location: New York
Audio files: 24
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| Posted: Sun May 27, 2007 10:21 pm Post subject:
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| Quote: | No minimum order requirements on THAT Products from me.
From THAT direct the MOQ is a single tube which on that part is 25 pcs. |
Yes, OK. Thanks .........
Bill |
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funkyfarm
Joined: Jan 21, 2007
Posts: 583
Location: France
Audio files: 3
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Posted: Mon May 28, 2007 5:15 pm Post subject:
Re: NPN/PNP Transistor array
Subject description: and matched transistors... |
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| yusson wrote: | | funkyfarm wrote: | | At least, i guess i don't understand the difference between "matched transistors" and "transistor array"... |
Matched transistors means that the transistors on the chip have the very same characteristics (VBE matched to 1mV tolerance for a fixed collector
current).
Transistor array, is a chip with many transistors of the same brand but which characteristics may vary with minimum a tolerance of 10mV |
"a tolerance of 10mV" which is less good than matched transistor.
There's another topic which states than moog once changed their matched transistor pairs for cheaper to get CA3096 on a prodcut line...
OK, so DIY diy BC550/560 matched transistor are better than those in the CA4000 series.
Thank ! (but it's a lot of work) |
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yusynth
Joined: Nov 24, 2005
Posts: 1314
Location: France
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| Posted: Mon May 28, 2007 11:36 pm Post subject:
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No the CA3046 is quite alright because the differential pair (Q1 and Q2) are matched wihin 1mV. The 3 other trannies of the package are not matched.
Therfore the diff-pair is usable for expo converters as Moog did.
The THAT transistor array series are all matched within 1mV so they very useable.
Other transistor arrays such as those containing 2N39.. in a same package are not matched.
If you want to have measurements check René Schmitz page :
http://www.uni-bonn.de/~uzs159/rbe.html
_________________
Yves
Last edited by yusynth on Wed May 30, 2007 11:42 am; edited 1 time in total |
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funkyfarm
Joined: Jan 21, 2007
Posts: 583
Location: France
Audio files: 3
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| Posted: Tue May 29, 2007 8:07 am Post subject:
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| yusson wrote: | No the CA3046 is quite allright because the differential pair (Q1 and Q2) are matched wihin 1mV.
The 3 other trannies of the package are not matched.
If you want to have measuremants check René Schmidz page :
http://www.uni-bonn.de/~uzs159/rbe.html |
that's interesting !
This is the scoop I was after, while it guess it maight be wrote somewhere in some ways in the datasheet 
there's nothing like a good discussion, isn't it ?
Thank you very much.
How to match transistors? topic |
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