NVE Sensor and Isolator News
August 2009
In This Issue

Company News
Featured Distributor

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Sensor Selector Guide

Isolator Selector Guide

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Fun Formulas
    Three Iron

Three Iron
Company News
NVE Makes List of Fastest-Growing Companies
FSB 100
NVE ranked third in the technology industry and 13th in America on the Fortune Small Business 2009 list of America’s 100 fastest-growing small public companies. The list is in the July/August issue on newsstands now.

A quote from the article: “To thrive in these conditions, you must be extraordinary. You have to offer a smart solution that solves a genuine problem for customers.”

Thanks to all our customers for making our extraordinary growth possible.

<NVE Awards and Accolades>

New Isolator Patent
Patent Plaque
A patent titled “Inverted magnetic isolator” was awarded to NVE in July.

Award-winning, patented IsoLoop isolators have unprecedented small size, high speed, low pulse width distortion, best-in-class EMC, and unlimited life with no degradation.

NVE has a number of patents on isolators and other spintronic technology dating back to 1995.

<Links to NVE Patents>

Featured Distributor
Braemac Logo
Braemac North America was appointed an IsoLoop Isolator distributor in 2007 covering North and South America.

Braemac stocks isolators and provides factory-trained in-house technical support. Braemac North America is headquartered in the heart of Silicon Valley in Fremont, Calif., and also has several other offices in North America with more coming soon.

<Link to Braemac>

<Isolator Distributor Network>
From the Application Desk
Real-world questions from the NVE Application Desk

Q. How can I provide isolated differential outputs from differential inputs?

A. IL600-Series Isolators are ideal for isolating differential signals because you have access to the input coils and you do not need input power to drive the signal across the barrier.

A basic circuit is:
Differential I/O Using the IL611

Differential I/O Using the IL611

Circuit Operation
When the voltage at node Y is greater than the voltage at node Z, current flows into coil 1 via the IN1+ terminal and out of the IN1- terminal, resulting in a logic high at the OUT+ node. Current flows out of IN1-, into IN2- and finally out of IN2+ to return to the Z terminal. The flow of current from IN2- to IN2+ creates a logic low on the OUT- node.

Conversely, when the voltage at node Z is higher than the voltage at node Y, current will flow into coil 2 via IN2+ and out of the IN2- terminal. This will result in a logic high at the OUT- terminal. Current continues to flow out of the IN2- node into IN1- and out of IN1+ to return to the Y node, resulting in a logic low on OUT+.

Input Current Limiting
Current-limiting resistors can be selected to ensure input coil currents are at least ±5 mA and no more than ±10 mA. Because the input signals are differential, bypass (boost) capacitors across the resistors are not needed.

IL600-Series Isolators
The award-winning IL600-Series Isolators provide unique passive inputs for flexibility and are available with either CMOS or open-drain outputs. Key features are:
  •  Very Wide Input Voltage Range
  •  Open Drain or CMOS Outputs
  •  Up to a 100 Mbps Data Rate
  •  MSOP, SOIC, and PDIP Packages

<More About IL600-Series Isolators>

Got a question? The NVE applications desk is here to help:
     Isolator Applications: (952) 829-9186; iso-apps@nve.com
     Sensor Applications: (800) GMR-7141; sensor-apps@nve.com