[sdiy] MPQ2907 Quad Transistor Info?

[James Patchell]

The MPQ2n2907 might be useful...but, the transistors are not on the same 
substrate (they are individual die), and so you cannot guarantee any sort 
of matching at all....however...you would probably find that they are 
matched more than good enough.  Most likely, the die all came from the same 
wafer (but you cannot count on that), so, they are probably better matched 
than you would think.  Even when I purchase 2n3906's and set about to match 
them...I am amazed at how often a batch of 20 or so will all be within 
about 2 mV or so.  So, if they are cheap (like maybe 20 cents a dip, or in 
that range), give them a try.  Even though they are not on the same 
substrate, they are in the same package and will probably thermal track 
good enough.  However, they are not cheap (say $2 a dip)...I would say 
forget it...and look into transistor arrays from THAT corporation...

At 07:54 PM 10/20/2003 -0700, Scott Stites wrote:
>Hi list,
>
>I received my most recent Hosfelt catalog and ran across the quad PNP
>package MPQ2907N.  Since apparently the transistors are on the same
>substrate, could I assume they're reasonably matched?  I couldn't really
>find much information on them on the web.  Any info would be appreciated.
>
>Thanks,
>Scott

         -Jim
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