[sdiy] PNP and NPN matched pairs / arrays?

[Dave Kendall]

On Jan 4, 2012, at 19:25, Justin Owen wrote:

> Hello,
>
> I'm about to start looking into the world of matched transistor pairs 
> or arrays of 4.
> I'm working on a design that might benefit from matched versions of 2x 
> NPN and 2x PNP pairs (4x NPN and 4x PNP total).
> Ideally I'd like something that was available in DIL and SOT-23 (or 
> similar) - but if I had to choose one over the other - SMT parts are 
> my preference.
> Does anyone have a favourite part or range they could suggest for me 
> to have a look at?
> FYI - I'm currently using 2N3904s and 2N3906s matched with my DMM - so 
> I'm up for hearing about any parts that might be an improvement on 
> that (excluding hand-matching pairs).
> Thanks - and happy new year to everyone!
>
> Justin
>

I haven't used them myself, but I believe they have been used in sdiy 
successfully before (can't remember where though - an Oakley module 
maybe?)

Check out the THAT340 for a dual NPN + PNP pair in a DIL or SMT package.
http://www.alldatasheet.com/datasheet-pdf/pdf/122003/ETC1/THAT300.html

Hope this helps :-)
Happy new year!

cheers,
Dave