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ADUM1281 Datasheet(PDF) 1 Page - Analog Devices |
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ADUM1281 Datasheet(HTML) 1 Page - Analog Devices |
1 / 20 page 3 kV RMS Dual Channel Digital Isolators Data Sheet ADuM1280/ADuM1281/ADuM1285/ADuM1286 Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2012–2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES Up to 100 Mbps data rate (NRZ) Low propagation delay: 20 ns typical Low dynamic power consumption Bidirectional communication 3 V to 5 V level translation High temperature operation: 125°C High common-mode transient immunity: >25 kV/μs Default high output: ADuM1280/ADuM1281 Default low output: ADuM1285/ADuM1286 Narrow body, RoHS-compliant, 8-lead SOIC Safety and regulatory approvals (pending) UL recognition: 3000 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice #5A VDE Certificate Of Conformity DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12 VIORM = 560 V peak Qualified for automotive applications APPLICATIONS General-purpose multichannel isolation Data converter isolation Industrial field bus isolation Hybrid electric vehicles, battery monitor, and motor drive GENERAL DESCRIPTION The ADuM1280/ADuM1281/ADuM1285/ADuM12861 (also referred to as ADuM128x in this data sheet) are dual-channel digital isolators based on the Analog Devices, Inc., iCoupler® technology. Combining high speed CMOS and monolithic air core transformer technology, these isolation components provide outstanding performance characteristics superior to alternatives, such as optocoupler devices and other integrated couplers. With propagation delay at 20 ns, pulse width distortion is less than 2 ns for C grade. Channel-to-channel matching is tight at 5 ns for C grade. The two channels of the ADuM128x are independent isolation channels and are available in two channel configurations with three different data rates up to 100 Mbps (see the Ordering Guide). Industrial grade models operate with the supply voltage on either side ranging from 2.7 V to 5.5 V while automotive grades operate from 3.0 V to 5.5 V, providing compatibility with lower voltage systems as well as enabling a voltage translation functionality across the isolation barrier. Unlike other optocoupler alternatives, the ADuM128x isolators have a patented refresh feature that ensures dc correctness in the absence of input logic transitions. When power is first applied or is not yet applied to the input side, the ADuM1280 and ADuM1281 have a default high output, and the ADuM1285 and ADuM1286 have a default low output. For more information on safety and regulatory approvals, go to http://www.analog.com/icouplersafety. FUNCTIONAL BLOCK DIAGRAMS ENCODE DECODE ENCODE DECODE VDD1 VIA VIB GND1 VDD2 VOA VOB GND2 1 2 3 4 8 7 6 5 ADuM1280/ ADuM1285 Figure 1. ADuM1280/ADuM1285 ENCODE DECODE DECODE ENCODE VDD1 VOA VIB GND1 VDD2 VIA VOB GND2 1 2 3 4 8 7 6 5 ADuM1281/ ADuM1286 Figure 2. ADuM1281/ADuM1286 1 Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329. Other patents are pending. |
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