How about using a single ended part with an isolated power converter ?
Then pass the output via an optoisolator or a transformer ?

> I need to design a device that interfaces to the speed sensor of heavy
> trucks. These are variable reluctance sensors and will remain connected
> to the vehicle's ECU, my circuit will piggyback. These are two-wire,
> differential signals full of common-mode noise and vary in amplitude
> greatly with frequency and also position as the tailshaft bearing wears
> in the vehicle.
>=20
> Right now I am designing the front end and would love to use something
> like the MAX9924 since it makes things simple. But it's a Maxim part
> which I am still hesitant to spec.
>=20
> Parts like the LM1815, LM2907, NCV1124 are all single-ended input. The
> NCV7001 is end-of-life.
>=20
> Any pointers toward a differential VR sensor interface IC?
>=20
> This is a smallish volume product, so I don't expect to be able to get
> any high-volume ABS interface parts. Which at this point are probably so
> highly integrated with other functions as to be unusable to repurpose
> for my use anyway.
>=20
> Thanks,
>=20
> Bob Blick
--=20
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