Hi Spidy,
I think its an important question; how much propagation time do you need?
Optocoppler are today not the best isolating copplers, and they have limited lifetime too!
You can select ADUM12xx i.e. from ADI, but they have in some situations by power up/down falsh impulses_these can make relevant problems for you (i.e. by PWM are both FETs at same time on! :-()
Top actuell are capacitive copplers i.e. from TI, they are not only less expensive, works as multi channal types up to 150Mbps, but simpler to handle and dont have lifetime problems as both befor discussed coppler types...
K.
Added after 1 hours 7 minutes:
Hi Spidy,
tnx!
I have overseen that you have DC tocoppel too; but you need so & so some "primary-side" electronic, with a little pwr supply...
I think, the simplest way is for dc to apply first an U/F converter (only 1 IC) and than some isolating coppler.
Some one can say: its possible direct to transmit with an analogue coppler too_ yes, but you need minimum selected (some more expensive) optocoppler & "a feed back" to stabilize the amplitude changes vs altering and temp effects...
To end it can not be simpler & better as an U/F converter + coppler.
K.