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AB-1: Glossary of Terms (.pdf)
NVE’s acclaimed glossary mixes useful definitions with geeky humor.
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AB-2: High Voltage Testing
Standards Overview (.pdf)
A description of isolator high-voltage test standards, including VDE 0884-10,
IEC 60747-5-5, IEC 61010-1, IEC 60601-1, and UL 1577.
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AB-3: Package, Tape and Reel,
and Pad Layout Specifications (.pdf)
In addition to meeting JEDEC standards, NVE isolator packages have unique creepage
specifications. NVE also recommends pad layouts that avoid compromising isolator
creepage and clearance.
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AB-4: Isolated Logic Level
Shifters (.pdf)
IL700/IL200 Isolators can level-shift between 5 V and 3.3 V logic levels
while isolating data.
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AB-5: Isolated RS-485 and RS-422
(.pdf)
NVE's unique IL400- and IL3000-Series single-chip isolated transceivers dramatically
reduce chip count and board area compared to traditional optocouplers.
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AB-6: RS-485 Systems (.pdf)
Practical tips and rules of thumb for making RS-485 systems work.
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AB-7: GMR in Isolation (.pdf)
The theory of spintronic giant magnetoresistance (GMR) and its application in
NVE’s unique IsoLoop Isolators.
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AB-8: Power Supply Bypass Capacitor
Selection and Placement (.pdf)
Correct selection and placement of power supply bypass capacitors ensures trouble-free
operation for circuit boards with IsoLoop Isolators.
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AB-9: Pb-free and Sn/Pb Solder
Profiles (.pdf)
This bulletin specifies solder profiles for RoHS-compatible Pb-free isolators
as well as traditional Sn/Pb parts.
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AB-10: Differential Line Receivers
Using IL600-Series Isolators (.pdf)
The unique passive inputs of the IL600-Series Isolators are ideal for direct connection
to differential networks such as RS-485 and RS-422. This document shows how to
save components and reduce cost.
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AB-11: Isolated A/D Converters
(.pdf)
This bulletin shows how Isoloop isolators are used to enhance static and dynamic
ADC performance through effective digital current steering.
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AB-12: IsoLoop Isolators for
High-Efficiency Power Control (.pdf)
Isoloop isolators offer important advantages over optical couplers in isolating
MOSFETs in H-bridge drivers and DC-DC convertors:
- 2 nanoseconds typical pulse width distortion to minimize transistor
dead time and maximize efficiency
- Unlimited life and no degradation over time
- Smaller packages, including two-channel MSOP-8s
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AB-13: IsoLoop Isolators Have
Low Emissions, Low EMI Susceptibility, and Excellent Magnetic Immunity (.pdf)
IsoLoop Isolators have the best EMC footprint of any isolation technology with
extremely low emissions, low EMI susceptibility, and excellent magnetic immunity.
This bulletin explains why IsoLoop Isolators have superior performance, and summarizes
EMC specifications versus applicable standards.
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AB-14: Isolating Data Converters:
What's All the Noise About? (.pdf)
Isolation is a cost-effective way to reduce data converter system noise and increase
resolution. This bulletin shows how to achieve best in class distortion
specs with the correct mix of isolation and appropriate ground plane PCB layers.
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AB-15: IL600-Series Isolators
for Channel-to-Channel Isolation (.pdf)
Channel-to-channel digital signal isolation is often required in PLCs and similar
applications. Traditional optocouplers, however, degrade performance by increasing
timing parameters such as PWD, propagation delay, and skew. IL600/IL600A Isolators
provide excellent channel-to-channel isolation with little timing degradation.
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AB-16: Applications for IL800,
IL700, IL200, IL500, and IL600 Series Digital Isolators (.pdf)
One of the most frequently asked questions at the isolator applications desk is
what's the difference between NVE's digital isolator families? This application
note sheds some light on the design differences between the various model families,
why those differences are important, and where the individual products are best
used.
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AB-17: Isolated I²S Minimizes
Distortion—Reaching Isolated Audio Heaven (.pdf)
This application note is about isolation electronics in high-fidelity digital
sound, and in particular, techniques that can be used to reduce the noise floor
of any given system. An isolated I²S CD transport with DAC circuit is described.
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AB-18: IsoLoop Isolators Have
Best-in-Class Endurance Voltage (.pdf)
Endurance voltage is the maximum voltage that can be applied between the input
and output pins of an isolator indefinitely without damage. It may be the least
well-known high-voltage specification. This bulletin explains different high-voltage
specifications, and illustrates an application where endurance voltage is important.
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AB-19: PROFIBUS Compliance:
A Hardware Design Guide (.pdf)
Hardware design best practices for Profibus DP nodes. Covers three important but
sometimes tricky design considerations: isolation, Profibus compatibility, and
bus node polarity.
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AB-20: NVE’s
IL600 Series: The True Optocoupler Alternative (.pdf)
This bulletin describes the features of IL600-Series isolators that make them
ideal replacements for optocouplers, including wide input voltage range, no input-side
power supply, differential inputs, channel-to-channel isolation, and CMOS or open-drain
outputs. The bulletin includes a number of example circuits.
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AB-21: Isolated CAN Reference
Design (.pdf)
This bulletin describes a complete isolated CAN node including a dc-dc convertor
and bus transient voltage protection.
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AB-22: IsoLoop Isolators Have
Best-in-Class Transient Immunity (.pdf)
This bulletin focuses on isolator transient immunity in floating supply applications,
practical measurement techniques for this important parameter, and even how to
increase transient immunity for IsoLoop Isolators.
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AB-23: NVE Isolators Feature
TRUE Eight Millimeter Creepage (.pdf)
An ordinary wide-body package has 7.6 mm typical creepage, but the NVE “True
8” isolator package was custom tooled to meet eight millimeter isolation
requirements. Even with worst-case package dimensions and pin placement, the unique
package meets the eight millimeter requirements under IEC 60601 250 working-voltage
measurement rules.
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AB-24: IsoLoop Isolators Have
Excellent Thermal Characteristics (.pdf)
Award-winning IsoLoop® Isolators have excellent thermal characteristics, enabling
the parts to run at high speed and high ambient temperatures with minimum temperature
rises. This provides wide operating margin and contributes to exceptional reliability.
This bulletin summarizes IsoLoop thermal specifications, describes how thermal
resistance is measured, and gives a representative thermal derating curve.
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AB-25: IsoLoop Isolators Enable
Next-Generation Switching-Mode Power Supplies (.pdf)
New 2.5 kV MSOP isolators allow denser, more precise, and more reliable Switching-Mode
Power Supplies. This bulletin reviews the evolution of SMPS technology and examines
new isolators that enable better-than-ever power supplies.
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AB-27:
Intrinsically Safe Isolators (.pdf)
A number of NVE isolators have been certified under stringent ATEX and IECEx requirements
for use as isolating components between intrinsically safe circuits (IS-to-IS)
in explosive atmospheres. When used within recommended entity parameters they
will not become an ignition point when subjected to short circuits or if connected
circuitry fails.
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AB-28: Up to 16 mm Creepage with
NVE Isolators (.pdf)
NVE IL7000-Series Isolators with integrated DC-to-DC converters allow a simple
solution for demanding systems. Two True 8 mm creepage packages in series provide
true 16 mm creepage and 12 kV isolation voltage.
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AB-29: Simple Radiated Emissions
Control for NVE’s Isolated DC-to-DC Converters (.pdf)
NVE’s isolated DC-to-DC converters and couplers and transceivers with integrated
DC-to-DC converters will pass CISPR Class B or FCC Class B every time using the
simple mitigation techniques described in this bulletin. |