WEBVTT

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♪ Resistance ♪

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Hi, I'm Jim Schuetz with NVE Corporation.

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Today we're demonstrating the remarkable 
isolation barrier of NVE's award-winning isolators.

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NVE isolators have a hundred times better
barrier spec than other digital isolators:

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100 teraohms versus one teraohm.

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This remarkable advantage comes from a unique
polymer/ceramic composite barrier.

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Other digital isolators use silicon dioxide
or plastic-only barriers,

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which are not as good.

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Our barrier is like indestructible fiberglass,
compared to

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cheap plastic,

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or rusted sheet metal.

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We sample-test isolator barrier resistance
frequently, for agency compliance,

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and to ensure we meet specifications.

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Here's our test set-up:

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We rest the device under test on 
a highly-resistive Teflon sheet.

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We're not using a socket or circuit board
because in this range,

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it could degrade the resistance.

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And we've wired the terminals on each side
together to ensure they're connected.

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Finally, we're using an analog meter 
since it's easier to see.

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We connect the isolators as two-terminal devices,
with the input-side pins connected together,

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and the output-side pins connected, and then
they're connected to the high-resistance meter.

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We'll demonstrate 2-channel and 4-channel
parts; wide-body and MSOPs.

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In accordance with industry standards, 
we're testing at 500 volts.

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On this meter that means we use 
the second scale from the top.

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First the two-channel IL711VE:
We charge it and let it stabilize…

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Then switch it to "measure" mode.

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As you can see,we have more than 
2 x 10^16 ohms--more than 20 peta-ohms.

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…well above our specification of 
10^14 ohms, or 100 teraohms

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Next we have a four-channel IL715VE: with
more channels, this has more barrier area

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than the two-channel part,
so it's worst case.

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We let it stabilize…

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and the resistance is still
more than 5 x 10^14 ohms.

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Isolators are normally resistance-tested at
500 volts, but to show how good these parts are,

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we'll crank the voltage up to a kilovolt.

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With a kilovolt we’ll use the top scale
on the meter.

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After it charges, we turn it to measure mode,

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...and we still have over 4 x 10^14,

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or 400 teraohms.

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Finally, here's an IL712-1E MSOP isolator,
the world's smallest isolator.

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So, there's not much packaging plastic in
this one.

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But like the wide-body isolators, more than
a peta-ohm of resistance.

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In addition to barrier resistance, IsoLoop
isolators have best-in-class

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high-voltage metrics, including:

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isolation voltage;

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Comparative Tracking Index;

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and barrier life.

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So we've demonstrated that IsoLoop Isolators
have best-in-class barrier resistance of

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over 100 teraohms.

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Click, e-mail, or call us 
for more information.