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Author: Howard Wisniowski
Source From: ADI
Posted Date: 2010-11-23

Tuning its proprietary iCoupler® digital isolation technology to meet the reliability and quality needs of emerging electric-hybrid vehicles, Analog Devices, Inc. (ADI) is introducing a family of digital isolators designed to operate in today’s electrically challenging automotive environment. Unlike the relatively low-voltage signals powering most in-car entertainment, safety, and power train systems, hybrid-vehicle batteries can operate at voltages in excess of 600 V, which creates a need to galvanically isolate system-critical electronics. Analog Devices’ new ADuM120xW, ADuM130xW and ADuM140xW digital isolators were developed for electric-hybrid vehicle systems, such as motor drives and battery management systems. These new iCoupler products are the first digital isolators to carry an AEC-Q100 qualified –40°C to +125°C automotive temperature rating.

“Until today, the only isolation available for hybrid car and truck batteries was in the form of optocouplers, which are notorious for being difficult to manage and operate at temperatures over 105°C,” said Robbie McAdam, vice president, Analog Semiconductor Components Division, Analog Devices. “In an application where fuel economy and battery capacity are everything, ADI’s digital isolators not only remove the limitations of optocouplers, they do so at 90 percent less power consumption.”

About the ADuM1xxxW Digital Isolators The two-channel ADuM120xW, three-channel ADuM130xW and four-channel ADuM140xW digital isolators are based on Analog Devices’ proprietary iCoupler chip-scale micro-transformer technology that has been used in more than 150 million channels of isolation shipped into a wide array of applications including industrial, medical, power supply, and consumer systems. These new automotive products provide multiple isolation channels in a variety of channel configurations and data rates up to 25 Mbps. The CMOS-based parts operate with the supply voltage on either side ranging from 3.0 V to 5.5 V, providing compatibility with lower voltage systems as well as enabling voltage translation across the isolation barrier.

Unlike alternative isolation technologies such as optocouplers, which suffer from performance degradation and wear-out at high temperatures, iCoupler digital isolators are relatively insensitive to temperature and demonstrate excellent long-term reliability. Because iCoupler products have a digital interface, there is no need for external signal conditioning components, and they consume one-tenth to one-sixth the power of optocouplers at comparable signal data rates.

Pricing and Availability The ADuM120xW, ADuM130xW and ADuM140xW digital isolators are available now for sampling and volume production. The new digital isolators are available in 8-lead narrow-body or 16-lead wide-body SOIC (small-outline integrated circuit) packages and are priced starting at $0.55 per channel in OEM quantities. For more information, visit,, and


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About Us:Analog Devices, Inc. (NYSE: ADI) defines innovation and excellence in signal processing. ADI's analog, mixed-signal, and digital signal processing (DSP) integrated circuits (IC) play a fundamental role in converting, conditioning, and processing real-world phenomena such as light, sound, temperature, motion, and pressure into electrical signals to be used in a wide array of electronic equipment. But that doesn’t begin to capture the essence of what Analog Devices does for our customers, and ultimately for the end user.

Note: The copyright and the ownship of the brand, product names, product numbers, and content mentioned belongs to their repective companies.

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