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AB-1: A Standards Guide for IsoLoop Isolators (.pdf)
NVE has qualified or received approval to various safety standards for
its IsoLoop Isolators. This guide summarizes those standards.
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AB-2: High Voltage Testing Standards Overview (.pdf)
A description of high-voltage test standards relating to isolators, including
UL1950, UL1577, UL3101-1, and VDE0884.
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AB-3: IL700/IL200 Inherent Latching Application (.pdf)
In "fail-safe" situations, IL700/IL200 Isolators eliminate the
need for latches.
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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 ns typ. pulse width distortion to minimize transistor
dead time and maximize efficiency
- Unlimited life and no degradation over time
- Smaller packages, including two-channel devices in MSOP-8s
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AB-13: IsoLoop Magnetic Immunity and Susceptibility (.pdf)
IsoLoop Isolators far exceed required immunity to perturbations as
defined by the governing standards for most industrial, commercial, telecom,
residential and medical applications. This bulletin gives guidelines for
using IsoLoop Isolators in challenging EMC environments.
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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 IL700, IL200, IL600,
and IL500 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: Isolator 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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