Digital Isolators have 4-channel, compact design.

Press Release Summary:

Supplied in 5 x 6 mm QSOP, iCoupler® ADuM744x series can isolate 4 channels of data and power. Products are available in various configurations with multiple channel-direction options and 1-25 Mbps data-rate options. Operating from 3.0-5.5 V supply, they can reduce board space by as much as 70% and incorporate input glitch filter that protects against extraneous noise disturbances. Suitable applications include those that need only up to 1 kV rms isolation.

Original Press Release:

Analog Devices Introduces the Industry's Smallest Four-Channel Digital Isolators

- New iCoupler® digital isolation products provide a 1-kV rms isolation rating, reduce board space up to 70 percent, and cut costs by 20 percent.

Norwood, MA (07/15/2009) - Analog Devices, Inc. (ADI), a global leader in high-performance semiconductors for signal-processing applications, announced today the industry's smallest four-channel digital isolators. Housed in a small, 5 mm x 6 mm, QSOP (quarter-size small outline package), ADI's ADuM744x digital isolators can isolate four channels of data and power, while reducing board space up to 70 percent and cutting costs by 20 percent. This is especially effective for those applications that need only up to a 1-kV rms isolation rating and for cost-sensitive designs for which small size is more critical than isolation requirements. The new devices expand ADI's selection of iCoupler® digital isolation technology products, which includes 2.5-kV rms and 5-kV rms isolation rated offerings, giving customers the broadest and best choice of digital isolator options than any other supplier in the industry.

About the ADuM744x Digital Isolators
The ADuM744x family of digital isolators, comprised of the ADuM7440, ADuM7441, and ADuM7442, is available in a variety of configurations with multiple channel-direction options and data-rate options ranging from 1 Mbps (megabits per second) to 25 Mbps. The devices offer a 3.0-V to 5.5-V supply voltage range, which provides compatibility with lower voltage systems and enables voltage translation across the isolation barrier. The ADuM744x digital isolators offer very low power consumption while providing low pulse-width distortion. Each product also features an input glitch filter to protect against extraneous noise disturbances. Designed specifically for size and cost savings, the ADuM744x offerings are not simply de-rated versions of existing products as are competing 1-kV rms digital isolators. For more information on the ADuM744x family, please visit
Availability and Pricing
Product Availability Unit Price in 1,000-Piece Quantities Packaging Channel Configuration
ADuM7440 Sampling Now $1.50 16-lead QSOP* 4/0
ADuM7441 Sampling Now $1.50 16-lead QSOP package 3/1
ADuM7442 Sampling Now $1.50 16-lead QSOP package 2/2

*quarter-size small outline package

iCoupler Technology and the Introduction of 1-kV rms Isolation
With almost 300 million channels deployed, ADI's proven iCoupler technology is based on chip-scale transformers, rather than the LEDs and photodiodes found in optocouplers. Transformers support higher data rates, consume less power, and are more stable over life as compared to LEDs and photodiodes. By fabricating the transformers directly on-chip using wafer-level processing, iCoupler channels can be integrated with each other and other semiconductor functions at low cost. iCoupler transformers with 2.5-kV rms or greater isolation ratings employ a 20-µm layer of high-breakdown polyimide. In contrast, the new 1-kV rms isolation rated products use a lower cost, thinner, SiO2 insulator that has limited isolation capability compared to the 20-µm thick polyimide insulator.

About Analog Devices
Innovation, performance, and excellence are the cultural pillars on which Analog Devices has built one of the longest standing, highest growth companies within the technology sector. Acknowledged industry-wide as the world leader in data conversion and signal conditioning technology, Analog Devices serves over 60,000 customers, representing virtually all types of electronic equipment. Celebrating over 40 years as a leading global manufacturer of high-performance integrated circuits used in analog and digital signal processing applications, Analog Devices is headquartered in Norwood, Massachusetts, with design and manufacturing facilities throughout the world. Analog Devices' common stock is listed on the New York Stock Exchange under the ticker "ADI" and is included in the S&P 500 Index.

iCoupler is a registered trademark of Analog Devices, Inc..

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