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 Forum index » DIY Hardware and Software
matched transistors
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rumpofsteelskin



Joined: Apr 22, 2009
Posts: 52
Location: brighton, uk
PostPosted: Sun Nov 08, 2009 11:18 am    Post subject: matched transistors Reply with quote  Mark this post and the followings unread
im looking for a cheap matched monolithic npn pair, small signal - for use in lin/log converters. does anyone know any??
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Tim Servo



Joined: Jul 16, 2006
Posts: 924
Location: Silicon Valley
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PostPosted: Sun Nov 08, 2009 2:06 pm    Post subject: Reply with quote  Mark this post and the followings unread
LM394 - discontinued, but Futurlec still has them in stock at a very good price. You might also look at the SSM2210 and MAT02 matched pairs, but these are more expensive and can be difficult to find.

Tim (I held up two pieces of fruit at the market the other day and told my wife I had a matched pair of pears... she didn't get it) Servo
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numbertalk



Joined: May 05, 2008
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Location: Austin, TX
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PostPosted: Mon Nov 09, 2009 1:02 pm    Post subject: Reply with quote  Mark this post and the followings unread
Tim Servo wrote:
LM394 - discontinued, but Futurlec still has them in stock at a very good price. You might also look at the SSM2210 and MAT02 matched pairs, but these are more expensive and can be difficult to find.

Tim (I held up two pieces of fruit at the market the other day and told my wife I had a matched pair of pears... she didn't get it) Servo


I'm afraid Futurlec seems to have run out of these some time ago.
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frijitz



Joined: May 04, 2007
Posts: 1734
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PostPosted: Mon Nov 09, 2009 1:42 pm    Post subject: Reply with quote  Mark this post and the followings unread
numbertalk wrote:
I'm afraid Futurlec seems to have run out of these some time ago.

scratch Are you sure? I just got a batch from them last week.

Very Happy

Ian
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numbertalk



Joined: May 05, 2008
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PostPosted: Mon Nov 09, 2009 2:38 pm    Post subject: Reply with quote  Mark this post and the followings unread
frijitz wrote:
numbertalk wrote:
I'm afraid Futurlec seems to have run out of these some time ago.

scratch Are you sure? I just got a batch from them last week.

Very Happy

Ian


I guess I'm not Smile But every time I've checked in the past couple months it's said not in stock with no "order" button. Maybe I just keep looking at the wrong times.
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parasat



Joined: Aug 13, 2009
Posts: 33
Location: chicago
PostPosted: Mon Nov 09, 2009 3:14 pm    Post subject: Reply with quote  Mark this post and the followings unread
Ian that is amazing. I've been checking every week for 4-5 months and this is all I ever see. Not even an order button...

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andrewF



Joined: Dec 29, 2006
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PostPosted: Mon Nov 09, 2009 3:20 pm    Post subject: Reply with quote  Mark this post and the followings unread
just to clear things up Laughing
futurlec.com.au has them in stock
tho anything you order from there comes from Thailand anyway
so???

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frijitz



Joined: May 04, 2007
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Location: NM USA
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PostPosted: Mon Nov 09, 2009 4:46 pm    Post subject: Reply with quote  Mark this post and the followings unread
parasat wrote:
Ian that is amazing. I've been checking every week for 4-5 months and this is all I ever see. Not even an order button...

Yep, that's what I'm seeing now, too. My recent order was accepted on Oct 6, so not too long ago.

Very Happy

Ian
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frijitz



Joined: May 04, 2007
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PostPosted: Mon Nov 09, 2009 4:56 pm    Post subject: Reply with quote  Mark this post and the followings unread
Yep, the .au site just let me put one in the cart.

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parasat



Joined: Aug 13, 2009
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PostPosted: Mon Nov 09, 2009 6:05 pm    Post subject: Reply with quote  Mark this post and the followings unread
This is way too much for my little H1N1 wracked brain to handle. I'm going to choke down some aspirin and try to cool down before I start weaving some elaborate conspiracy theory Smile
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frijitz



Joined: May 04, 2007
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PostPosted: Mon Nov 09, 2009 7:32 pm    Post subject: Reply with quote  Mark this post and the followings unread
parasat wrote:
This is way too much for my little H1N1 wracked brain to handle. I'm going to choke down some aspirin and try to cool down before I start weaving some elaborate conspiracy theory Smile

Eeee! Get well soon!

Could be Futurlec got a small batch and they sold right away.

Very Happy

Ian
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pichenettes



Joined: Jan 08, 2010
Posts: 15
Location: france
PostPosted: Wed Apr 14, 2010 6:03 pm    Post subject: Reply with quote  Mark this post and the followings unread
I'm reviving this thread, currently shopping for pairs I wouldn't have to match myself...

- Ready to use
- Widely available (digikey, mouser...)
- DIP package, or anything through-hole...

To this day, what are the best options you know? Is it a "pick any 2" thing?
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haxster



Joined: Feb 01, 2006
Posts: 246
Location: MONTEREY PARK, CA 91754
G2 patch files: 2
PostPosted: Thu Apr 15, 2010 5:02 pm    Post subject: Reply with quote  Mark this post and the followings unread
At worst If you have to match your own use (2) 2N2222A NPN's they work the best. They can't physically touch, but get them close enough with the Tempco also and hot glue gun them with epoxy or similar and performance is good.
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Sound



Joined: Jun 06, 2006
Posts: 842

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PostPosted: Sat Apr 17, 2010 2:27 am    Post subject: Reply with quote  Mark this post and the followings unread
Quote:
MAT02 not recommended for new designs. Replacement part MAT12 with samples available April 19, 2010.


http://www.analog.com/en/other-products/matched-transistors/mat02/products/product.html
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