NVE Sensor and Isolator News
    June 2011 Electrifying  News  From  NVE
In This Issue
Wide-Body Isolators


Endurance Voltage

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In the News
NVE was featured recently on the Positively Wall Street show on KCEO Radio, San Diego.

The best tech company in Eden Prairie. 

Record Year
In May, NVE reported its 11th consecutive fiscal year of record product sales since becoming publicly traded in 2000.

Thanks to our loyal customers and new customers for making it possible.

Fun Fact
A Battery of Tests
IsoLoop Isolators (even MSOPs)
have demonstrated the ability to withstand a remarkable 800 Vac or 1,130 Vdc between the input and output pins indefinitely without damage (“the endurance voltage”).
That’s the equivalent of 753 D-cells, which would make a flashlight 150 feet long.
For more information, see the Application Corner at right.
Featured Product
Wide-Body SOIC-16 Isolators
Creepage distance A full eight millimeter external creepage distance for the most demanding high-voltage performance. IsoLoop Isolators offer a full product line in wide-body SOIC packages, providing 2,500 Vrms isolation voltage, 300 Vrms working voltage, and 800 Vrms endurance voltage (see the Applications Corner below).

Wide-body isolators are available in a variety of input, output, and channel configurations, as well as a full line of isolated RS-485/RS-422/PROFIBUS transceivers.

Key features include:
  • 0.3"-Wide SOIC-16
  • 8 mm Minimum External Creepage Distance
  • 3, 4, or 5 Channels, or RS-485/RS-422
  • Passive or Digital Inputs
  • CMOS or Open-drain Outputs
  • Up to 125°C (T-Series)
  • UL1577 / IEC 61010-2001

More than 25 wide-body SOIC isolators part types are currently in stock and available for immediate delivery with no minimum order:

Input Key Features Max.
IL514 2 2/1 Digital DC correct; Output Enable 85C
IL515 2 4/0 Digital DC correct; Optional Ext. Clock 85C
IL516 2 2/2 Digital DC correct 85C
IL613 100 3/0  Passive  85C
 IL614 100 2/1 Passive Output Enable 85C
IL715 110 4/0 Digital Output Enable 100C
IL716 110 2/2 Digital 100C
IL717 110 3/1 Digital 100C
IL715T 110 4/0 Digital High Temperature 125C
IL716T 110 2/2 Digital High Temperature 125C
IL717T 110 3/1 Digital High Temperature 125C
IL260 110 5/0 Digital Five Channel 85C
IL261 110 4/1 Digital Five Channel 85C
IL262 110 3/2 Digital Five Channel 85C
IL3122 5 RS-422 Passive 32 nodes; 15 kV Bus ESD 85C
IL3185 5 RS-485 Passive 32 nodes; 15 kV Bus ESD 85C
IL3222 5 RS-422 Passive Fractional Load (256 nodes) 85C
IL3285 5 RS-485 Passive Fractional Load (256 nodes) 85C
IL3422 20 RS-422 Passive 32 nodes; 15 kV Bus ESD 85C
IL3485 20 RS-485 Passive 32 nodes; 15 kV Bus ESD 85C
IL422 25 RS-422 Digital Industry Standard 85C
IL485 35 RS-485 Digital Industry Standard 85C
 IL485W  35 RS-485 Digital RS-485 + handshake 85C
IL3522 40 RS-422 Digital Very High Speed 85C
IL3585 40 RS-485 Digital Very High Speed 85C
IL3685 40 RS-485 Digital PROFIBUS 85C
Buy Online

Sensor/Test LogoNVE sensors will be on display at one of the largest sensor shows in the world, Sensor+Test 2011, June 7 - 9 in Nürnberg, Germany. NVE will exhibit in cooperation with distributor HY-LINE Sensor-Tech in Hall 12, Stand 610. <Free Registration Courtesy HY-LINE Sensor-Tech>

PCIM EuropeThe Power Conversion and Intelligent Motion (“PCIM”) show in May was a chance to show off powerful isolators to intelligent engineers in cooperation with distributor HY-LINE Power. RS-485 transceivers and CAN transceivers were especially popular.

Dr. Joe Davies of NVE chaired the “MRAM and Magnetic Logic Devices” and “Magnetization Dynamics and Ferromagnetic Resonance” sessions at InterMag 2011 in Taiwan recently.
Application Corner
Endurance Voltage
The maximum voltage that can be applied between the input and output pins of an isolator indefinitely without damage is called “endurance voltage.” Endurance voltage is typically not specified in data sheets and may be the least well-known high-voltage specification. Nevertheless, it is useful in applications where the isolators are not subject to line voltage transients.

IsoLoop Isolators’ endurance voltage has been determined to be 800 Vrms based on qualification testing. External creepage distance is up to eight millimeters (see “Wide-Body Isolators” above).

Watch on our new video for an explanation: 
Play Video ->
Play Video ->
This battery management system for measuring the voltage of each battery cell of a DC to AC inverter illustrates an application where endurance voltage is important:

Isolated Battery Management System Isolated Battery Management System
The last isolation stage is a full 300 V above the controller ground, so the isolator is subject to 300 V between inputs and outputs.

Because the isolators have an endurance voltage of 800 Vrms, or 1,130 Vpeak, the isolators can be expected to withstand up to 1,130 Vdc indefinitely, and will easily withstand the voltages in the circuit above.

<More Info (.pdf; Application Bulletin No. 18)>