Norwood, Mass. -- Analog Devices Inc. has claimed the industry's lowest power digital isolators with the introduction of the ADuM144x family. Based on ADI's proprietary iCoupler 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, according to the company. This makes the devices well 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 devices are quad-channel data isolators 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, according to ADI.
Other features: 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, which is said to result in an industry-best 1 μW of total power for the entire isolator.
In addition, the ADuM144x is also 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, said ADI.
Availability: The ADuM144xARQ and evaluation board are available now. The ADuM144xARSZ will be available in January 2014. Order ADuM144x samples, download data sheets and other technical documents by visiting http://www.analog.com/ADuM144x. Catalog Distributors Digi-Key Corp and Mouser Electronics are stocking inventory of both silicon and evaluation boards.
Pricing: The ADuM144xARQZ (4 mm x 5 mm, 16-lead QSOP) is priced at $1.93 in quantities of 1,000 and the ADuM144xARSZ (7.2 mm x 5.3 mm, 20-lead SSOP) is priced at $2.48 in quantities of 1,000. The evaluation board is priced at $49.00.