The ADuM744x1 are 4-channel digital isolators based on the Analog Devices, Inc., iCoupler® technology. Combining high speed CMOS and monolithic air core transformer technologies, these isolation components provide outstanding performance characteristics superior to the alternatives, such as optocoupler devices and other integrated couplers.
The ADuM744x family of quad 1 kV digital isolation devices is packaged in a small 16-lead QSOP. While most 4-channel isolators come in 16-lead wide SOIC packages, the ADuM744x frees almost 70% of board space and yet can still withstand high isolation voltage and meet regulatory requirements such as UL and CSA standards (pending). In addition to the space savings, the ADuM744x offers a lower price than 2.5 kV or 5 kV isolators where only functional isolation is needed.
This family, like many Analog Devices isolators, offers very low power consumption, consuming one-tenth to one-sixth the power of comparable isolators at comparable data rates up to 25 Mbps. Despite the low power consumption, all models of the ADuM744x provide low pulse width distortion (< 5 ns for C grade). In addition, every model has an input glitch filter to protect against extraneous noise disturbances.
The ADuM744x isolators provide four independent isolation channels in a variety of channel configurations and two data rates (see the Ordering Guide) up to 25 Mbps. All models 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 functionality across the isolation barrier. All products also have an output default high logic state in the absence of the input power.
|ADuM7440/ADuM7441/ADuM7442: 1 kV RMS四通道数字隔离器 (Rev B, 02/2011) (pdf, 533 kB)||产品数据手册|
|ADuM7440/ADuM7441/ADuM7442: 1 kV RMS Quad-Channel Digital Isolators Data Sheet (Rev C, 02/2012) (pdf, 496 kB)||产品数据手册|
Solving Isolation Challenges in Power Conversion Applications
This webcast will present solutions to isolation challenges in power conversion applications. Among the topics to be discussed are the limitations of traditional methods of isolation (such as utilization of optocouplers and pulse transformers) vs. more efficient and cost effective solutions that utilize digital isolators. If you are currently using optocouplers and pulse transformers, this is a webcast you should attend.
|UG-042: Evaluating 16-Lead SOIC and 16-Lead QSOP Digital Isolators User Guide (pdf, 504 kB)||用户指导|
|Functional SPI Isolation (pdf, 680 kB)||技术文章|
Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with Quad-Channel Isolators Design Summary
(pdf, 291 kB)
By Flow Zhao, Design Engineer
NAppkin Note: Lowering the Power of the ADuM524x
(pdf, 223 kB)
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|Digital Isolator Product Selection and Resource Guide (pdf, 640 kB)||产品选型指南|
2008 Medical Solution Profile
(pdf, 126 kB)
High Performance ICs for Medical Imaging, Patient Monitoring, and Instrumentation
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