[volt-nuts] Homebrew LTZ1000 reference?

[Randy Scott]

> Linear Technology has an application note
> on this very subject:
> 
> cds.linear.com/docs/Application%20Note/an86f.pdf

Has anyone here actually built the 20-bit DAC described in the app note?  I've been thinking about it and actually started laying out a PCB.  I am hesitant to pull the trigger, given that the DAC ICs that I was planning on using (LTC1595 in SO package) are $48 each and the design requires two of them.

Randy.