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I'm here with Sandy, in the NVE Applications Center.

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Sandy, can you explain how NVE's award-winning

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"IsoLoop" isolators work?

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I'd love to. But first, let's look at optocouplers. 

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As this shows, optocouplers transmit signals
by light through a dielectric that provides

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galvanic isolation. The optical elements are
slow, have limited life, and limit size.

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I hate optos!

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Doesn't everyone. 

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But IsoLoop couplers use
spintronics and magnetics, rather than optics,

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to transmit data. They consist of spintronic
GMR resistors, microscopic integrated coils,

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and conditioning electronics.

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The GMR resistors are spin valves with two
stable resistance states. 

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A dielectric provides isolation.

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The coil creates a magnetic field proportional to the input current. 

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The field changes the spin polarization of the spin
valves, which changes their resistance. 

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The output is amplified and conditioned
to produce an isolated replica of the input.

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So, IsoLoops transmit signals by magnetic
field and electron spin, rather than 

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light and photons?

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Exactly. And because ground potential variations are common to both sides of the coil, 

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they don't generate a current. This yields a large common-mode rejection ratio and 

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true galvanic isolation.

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Cool. And you said they were smaller and faster?

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Darn right. IsoLoops are available in MSOPs, QSOPs, narrow and wide SOICs, plus PDIPs, with 

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up to five channels per device. They run up to 150 megabits per second,

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 and up to 125 degrees C.

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Way cool. Where can I get data sheets or more info?

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You can click, to go to the isolator section
of nve.com.

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Or call us, at 800-GMR-7141, extension 4.