Transistor arrays

[Joachim Verghese]

On Wed, 28 Aug 1996, Kevin Lightner wrote:

> Does anyone know the exact differences between LM/CA 3046 and 3086's???
> Also, SG3821's?
> It seems VCO's are a bit more stable with the '86's, though in sine wave
> shapers, I can't see much improvement.

I've had similar experiences, the 3086 seems to work better in some
circuits, which is funny, because from the data sheets you get the
impression that the 3086 is a "relaxed" version of the 3046.

The 3046 transistors are guaranteed to be Vbe-matched to within 5 mV,
and the input offset current of the differentially connected pair
also has a specified maximum value. The manufacturer does not specify
these parameters for the 3086. The 3086 transistors might have better
temperature tracking charcteristics, though...would be interesting to
do some testing.

-joachim