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Analog Devices claims first digital isolators qualified for automotive systems

Norwood, Mass. — Analog Devices, Inc. (ADI) has developed a family of digital isolators, based on the company's iCoupler digital isolation technology, that meet the reliability and quality requirements of electric-hybrid vehicles. The ADuM120xW, ADuM130xW and ADuM140xW digital isolators are the first digital isolators to carry an AEC-Q100 qualified -40°C to+125°C automotive temperature rating.

The ADuM120xW, ADuM130xW and ADuM140xW digital isolators were developed
for electric-hybrid vehicle systems such as motor drives and battery management systems.
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, said ADI.

The two-channel ADuM120xW, three-channel ADuM130xW and four-channel ADuM140xW digital isolators provide multiple isolation channels in a variety of channel
configurations and data rates up to 25 Mbits/s. 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, said ADI. 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: The new digital isolators are available in 8-lead narrow-body or 16-lead wide-body SOIC packages and are priced starting at $0.55 per channel in OEM quantities.
Availability: The ADuM120xW, ADuM130xW and ADuM140xW digital isolators are available now for sampling and volume production.
Product information: ADuM120xW, ADuM130xW and ADuM140xW

Analog Devices Inc. , www.analog.com

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