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Digital isolation chips save board space, reduce costs

Norwood, Mass. — Analog Devices, Inc. (ADI) has expanded its family of digital
isolation products with a series of four-channel devices that isolate both data and power. Each device integrates ADI's iCoupler digital isolation technology and proprietary isoPower dc-to-dc converter, providing both isolated power and isolated signal channels within a single package.

The ADuM540x iCoupler digital isolators with isoPower in a 10 x 10-mm surface-mount package are said to reduce board space by up to 70 percent and cut costs by as much as 50 percent when compared to discrete solutions such as optocouplers with external dc-to-dc converters. In addition, the ADuM540x devices come with safety pre-approvals, allowing designers to realize faster design times as compared to discrete-based solutions, which require safety approvals that can delay time-to-market, said ADI.

The on-board isoPower isolated dc-to-dc converter provides up to 500 mW of regulated, isolated power and can operate at either 5.0 V or 3.3 V. A version with two channels (ADuM520x) and a version that features only the isoPower isolated power supply (ADuM5000) will be released later this year.

Pricing: Housed in a 16-lead wide-body SOIC package, the ADuM540x family is priced at $5.00 per unit in quantities of 1,000. The ADuM520x family and ADuM5000 are priced at $4.08 and $3.16, respectively, per unit in quantities of 1,000.
Availability: The ADuM540x family of four-channel digital isolators, including the ADuM5401, ADuM5402, ADuM5403 and ADuM5404, are available now, and the ADuM5400 will be available in July 2008. The ADuM520x family and ADuM5000 will also be available in July 2008.
Product information: iCoupler digital isolation technology, isoPower dc-to-dc converter, , ADuM540x, ADuM520x and
ADuM500

Analog Devices Inc. , www.analog.com

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