[sdiy] Super-matched transistors

[harrybissell]

National LM394 ???

or do you just mean quads ???

H^) harry

patchell wrote:

>     As far as I know, the SSM2210 is basically the same thing as the MAT0*s.  Over here, finding the SSM2210 is pretty much imposible.  Analog Devices has the SSM2210 listed as obsolete (I think?!).  If you have a source of SSM2210s, I would continue to use them.
>
>     Besides the Analog Devices parts, there are also the THAT transistor arrays.  They are in the process of redesinging these parts, the Harris fab that used to do them no longer exists, and they used the Harris dialectric isolation.  The new parts will have a differnt pin-out from the current parts (that figures).  The THAT parts also don't have as good of log conformity as the Analog Devices parts, but the Dual PNP/NPN pairs part is nice for
> making OTA's.
>
>     Those are really the only two manufacturers of matched arrays that could be called "super matched".
>
> Seb Francis wrote:
>
> > Hi,
> >
> > I've been browsing Jim Patchell's excellent site and I noticed he is selling MAT04 transistors.  I have seen these (and MAT02s) in many circuits, but have never been able to get them in the UK.  I've got on very well so far using SSM2210s, but I am intrigued about these MAT chips as I see them mentioned so often.  From a brief comparison of the datasheet SSM2210s seem slightly better spec'ed than MAT0*s, but maybe I'm overlooking something?
> >
> > Actually, having just searched the Analog Devices website, I can find no product "SSM2210" (although they are still available in UK).  Maybe I'm going to have to find another matched transistor soon ...
> >
> > Seb
>
> --
>  -Jim
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