So I decided to jump in off the back of my previous post and have a go at doing my first schematic - and perhaps overly ambitious.
Isolated USB<>UART adapter with TX inverted and shifted to 12V without need for additional power over that supplied by the USB BUS.
I've tried as best I can to follow some of the great advice here: Rules and guidelines for drawing good schematics
So (rightly or wrongly) I have copied and edited some of the IC symbol layouts to fit.
Alternative thought was to drop the LTC1751-5V, throw 5V through the ADuM's isolated DC-DC converter and then use an LDO to get a 3.3V source on the isolated side and chuck a BSS138 (or similar) to handle the 3.3V > 5V pre ADuM for the RX.
Would love to get some feedback, both in terms of style and technical (of which I'm sure there's many - USB ESD seemed to be a huge minefield of research..)