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Featured Product: ADuM4160 - Industry's First Single-Package USB Isolator
The ADuM4160 is the industry's first single package USB isolator that meets the most demanding medical and industrial standards while replacing complex board level solutions. The ADuM4160 offers 5kV rms medical-grade isolation as well as upstream short-circuit protection, and fully isolated 1.5-Mbps and 12-Mbps data rates. (IEC 60601-1 medical safety approvals are pending.) The USB 2.0-compliant device provides fully isolated USB functionality at a fraction of the cost and complexity of current data isolation methods, and makes it possible for medical and industrial design engineers to cut implementation costs by up to 25 percent, reduce the size of designs by as much as 50 percent, and trim development time from months to weeks.
For more information on the ADuM4160, please see:
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Featured Product: ADuM5000 - The World's Smallest DC-to-DC Converter
The recently released ADuM5000 is the world's smallest dc-to-dc converter. Available in a compact 10 mm x 10 mm 16-lead SOIC package, it is a full 40% smaller than the closest competitor's dc-to-dc converter solution. The ADuM5000 provides up to 500 mW of regulated, isolated power at either 5.0V from a 5.0V input supply or 3.3V from either a 3.3V or 5.0 supply. The ADuM5000 can be used in combination with the ADuM520x and ADuM540x isoPower products to achieve higher output power efficiency levels.
The isoPower family of parts offers the designer significant advantages over discrete solutions, such as optocouplers that require an external dc-to-dc converter and often cuts costs by as much as 50%.
For more information on the ADuM5000, please visit:
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ADuM520x/ADuM540x - Two- and Four-Channel, Single-Package Solutions for Data and Power Isolation
The recently released ADuM520x and the ADuM540x families are the second generation of isoPower products released by Analog Devices proprietary iCoupler technology. The two-channel ADuM520x and the four-channel ADuM540x are digital isolators with an isoPower dc-to-dc converter, providing up to 500 mW of isolated power and isolated signal channels within a single package. Like the ADuM5000, the ADuM520x and the ADuM540x devices offer a better choice than discrete solutions using optocouplers and an external dc-to-dc converter in applications such as: industrial field bus isolation, RS-232, RS-422 and RS-485 transceivers and industrial PLCs.
For more information on the ADuM520x and ADuM540x families, please visit:
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Automotive Grade Digital Isolators
The ADuM120x, ADuM130x and ADuM140x families of iCoupler devices have recently achieved AEC-Q100 automotive qualification. These established families of iCoupler digital isolators are now qualified for under-the-hood operation up to 125°C. Available in 8- and 16-lead SOIC packaging with data rates up to 25 Mbps, 3.0 to 5.5V level translation and low power consumption, the ADuM120x, ADuM130x, and ADuM140x products can be used in hybrid vehicle applications such as battery monitoring, gate drive for hybrid electric motor, dc-to-ac inverters, and electronic power steering. These automotive qualified products can also be employed in all vehicle types when being used as an interface for sensor clusters.
For more information on the ADuM120x, ADuM130x, and ADuM140x families, please see:
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Introducing the Analog Devices' Digital Isolation Update
The quarterly Digital Isolation Update kicked off in late 2007 to provide information on the new iCoupler digital isolators and general iCoupler news. The updates are also a source of technical information including mini-application notes that we call "nAppkin Notes" as well as insights into iCoupler technology written by our design engineers. In order to subscribe to our quarterly update, please visit the eNewsletter subscription site.
As always, we appreciate your feedback. Please send questions and comments to iCoupler_Isolation@analog.com.
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iCoupler® Digital Isolation
For more information on:
iCoupler® Interactive Selection Table
iCoupler® Product Selection Guide
Automotive Grade Digital Isolators Product Selection Guide
Order Samples
iCoupler® Technology
Application Notes
Technical Articles
Application Tools
IBIS Models
Safety Standards Compliance
FAQ
Analog Devices' Digital Isolation Updates Quarterly Emails
Featured Application Notes:
AN-0971 - Control of Radiated Emissions with isoPower Devices Coupler
(pdf 416,405 bytes)
Featured Presentations/Videos:
ADuM4160 Introduction Video
ADuM520x/ADuM540x Introduction Video
Controlling EMI in isoPower Devices Video
Power Supply on Chip Presentation
(pdf 1,826,090 bytes)
iCoupler Isolation Technology Presentation
Responses to Common iCoupler® Questions Presentation
Featured Press Releases:
Analog Devices Enables Isolated USB Connections for Medical and Industrial Equipment
May 20, 2009
Analog Devices Unveils Single-Package Solution for Medical-Grade Data and Power Isolation,
May 13, 2009
Analog Devices Introduces Four-Channel, Single-Package Solution For Data And Power Isolation,
May 20, 2008
Analog Devices Introduces Industry's First Digital Isolators Qualified For Automotive Systems,
May 19, 2008
Analog Devices Introduces Industry's First Isolated Gate Drivers With Integrated Isolated Power
March 19, 2008
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iCoupler® Technology
iCoupler technology is based on chip-scale transformers rather than the LEDs and photodiodes used in optocouplers. By fabricating the transformers directly on-chip using wafer-level processing. iCoupler channels can be integrated with each other and other semiconductor functions at low cost. iCoupler transformers are planar structures that use the CMOS metal layers as well as a gold layer fabricated on top of the wafer passivation. A high breakdown polyimide layer underneath the gold layer insulates the top transformer coil from the bottom. CMOS circuits connected to the top coil and bottom coil provide the interface between each transformer and its external signals.
Input logic transitions are encoded using 1 ns pulses routed to the primary side of a given transformer. These pulses couple from one transformer coil to another and are detected by the circuitry on the secondary side of the transformer. This circuitry then recreates the input digital signal at the output. In addition, a refresh ciruit is included at the input side to ensure hat the output state matches the input state even if no input transitions are present. This is important in power-up situations as well as input waveforms with low data rates or long durations with constant dc inputs.
Since the purpose of iCoupler products is to isolate an input from an output, the circuitry on one side of the transformer must be contained on a separate chip from the circuitry on the second side fo the transformers. The transformers themselves can be placed on either chip or on a third chip as shown in the ADuM140x configuration below. The entire chipset is assembled within a standard plastic package similar to that used for a wide variety of semiconductor devices.
A novel feature of iCoupler devices is their ability to combine both transmit and receive channels in the same package. Since the iCoupler transformers are inherently bidirectional, signals can pass in either direction, provided the appropriate circuitry is present on either side of the transformers. In this manner, multi-channel isolators are offered with a variety of transmit/receive channel configurations.
Another novel feature of the iCoupler technology is that the transformer coils that are used to isolate data signals may also be used as transformers in an isolated DC-DC converter. That allows both data and power isolation to be integrated into a single package, as is done on the ADuM524x family of iCoupler products.
The flexibility and scalability of iCoupler technology will continue to produce new innovations in isolation. Please come back to this site for updates on new products.
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