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Date: Fri, 23 Oct 2015 23:28:16 +0200
From: "Gabriel Paubert (paubert AT iram DOT es) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To: "Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Subject: Re: [geda-user] The Chippocolypse is coming!
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On Fri, Oct 23, 2015 at 09:25:52AM -0400, Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
> On Fri, Oct 23, 2015 at 9:16 AM, Evan Foss <evanfoss AT gmail DOT com> wrote:
> > On Fri, Oct 23, 2015 at 3:02 AM, Gabriel Paubert (paubert AT iram DOT es)
> > [via geda-user AT delorie DOT com] <geda-user AT delorie DOT com> wrote:
> >> For example, and as far as I can tell, Linear Technology has eliminated
> >> all TO-99 versions except the LTZ1000A, where the metal can is superior
> >> for reasons related to thermal insulation and mechanical stress on the die.
> 
> Sorry I miss read this.
> 

Thanks for the second reply, I couldn't understand the first one.

> > That is bizzar. I get that people hate paying for TO-99 stuff but a
> > reference really should be in that package. I have to wonder if they
> > are just switching people over to something newer that is available in
> > a TO-99. LT makes a few different references.

This is becoming offtopic, but the LTZ1000A is, to my knowledge, still
the best reference available in terms of noise and long term stability,
and until a few years ago, I only used buried Zener references when I
needed high stability.

But then, Linear started to produce a line of low noise bandgap 
references that are fairly close in performance to buried Zeners, 
especially the LTC6655, which is better than most buried Zeners.

This said, I use more LT6654 than LTC6655, it's clearly worse in the low
frequency noise range, but sufficient for most of my needs and much more
robust on the input (38V max vs 13.2).

Both the LTC6655 and LT6654 are available in SMD plastic and ceramic
package, but I've only used the plastic ones. The ceramic package 
has stability advantages over long term and temperature cycling 
which are of no interest in my applications.

    Gabriel