[time-nuts] LT3042, etc. Re: HP E1938A schematics.

[jimlux]

On 7/8/19 8:38 AM, Richard (Rick) Karlquist wrote:
> Regarding the E1938A schematic:
>
> Although not references per se, the LT3042/LT3045/LT3045-1
> are extremely low noise voltage regulators.  Actually,
> if there are any time nuts who haven't yet heard of these,
> the data sheets should be considered required reading.
> Recently, ADI introduced a family of negative regulators
> that are basically exact mirror images of the positive
> regulators, right down to the same pin out.  The LT3093
> is a negative version of the LT3042 and the LT3094 is
> a negative version of the LT3045-1.  ADI has done an
> outstanding job of supporting the chips with reference
> designs and PC board layout tips along with evaluation
> boards.
> 

Not only are they low noise, but they have spectacularly good HF 
rejection across the regulator up to 10s of MHz.

I highly recommend them.

They appear to be reasonably radiation tolerant, too, although not 
advertised as such.