Interesting, GMR. GMR being static, they could've made it DC stable (if
not necessarily appealing on current consumption), but they chose to do it
by pulse instead. GMR may be sensitive to DC fields, though they don't
specify.
The ADI magnetic isolators are about as fast (I think one is 50Mbps, but
they may have up to 100, I haven't looked in detail). They're also stable
at DC, in the presence of DC fields (basically until hall effect craps out
the silicon itself), and have higher isolation ratings (5kV RMS short
duration).
This device's susceptibility appears to be about independent of frequency,
which may be useful.
Strange that they measure note 10: surely a PRBS with no more than 5
consecutive digits is only a 5 bit generator, not 66,535; and surely they
mean 65535, and surely they mean 16 bit = 65535 state, not 65535 bits?
Tim