Low-power digital isolators reduce power by a factor of 1000 compared to optocouplers

Low-power digital isolators reduce power by a factor of 1000 compared to optocouplers
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Analog Devices, Inc. has introduced the company's ADuM144x family, which claim to be the industry’s lowest-power digital isolators.
By eeNews Europe


Based on ADI’s proprietary iCoupler digital isolation technology, the ADuM144x can be powered by as little as 1 µW of power, delivering power levels over 1,000 times lower than optocouplers and competing digital isolators.

At these levels the ADuM144x family is ideally suited for industrial and instrumentation systems such as 4-20 mA current loops, remote sensors and green systems that demand high energy efficiency or depend on limited power sources, such as batteries.

The ADuM144x are in a quad-channel data isolator available in three different channel configurations with a one-minute isolation safety rating of 2.5 kV rms.

They have an operating voltage range of 2.25 V to 3.6 V, further reducing power constraints and providing the lowest isolator operating voltage on the market. Quiescent power supply current at 2.5 V is less than 5-µA per channel, and power supply current at 2 Mbps is less than 380 µA per channel. A power saving mode can reduce current levels to as little as 0.1-µA per channel, resulting in an industry-best 1 µW of total power for the entire isolator. In addition to the significant power savings, the ADuM144x is available in a 16-lead QSOP package, making it the industry’s smallest quad-channel digital isolators with a 2.5-kV rms isolation rating.

Availability and Pricing

The ADuM144xARQZ packaged in a 4 mm x 5 mm, 16-lead QSOP is available now and is priced at $1.98 per 1k units.

The ADuM144xARSZ packaged in a 7.2 mm x 5.3 mm, 20-lead SSOP is available in January 2014 and is priced at $2.48 per 1k units.

An evaluation board is available now and is priced at $49.00.

Catalogue distributors Digi-Key Corp and Mouser Electronics are stocking inventory of both silicon and evaluation boards.

More information about the ADuM144x low power digital isolators at

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