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ADM2490EBRWZ-REEL7 Datasheet(PDF) 1 Page - Analog Devices |
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ADM2490EBRWZ-REEL7 Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page High Speed, ESD-Protected, Full-Duplex, iCoupler Isolated RS-485 Transceiver ADM2490E Rev. A 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 www.analog.com Fax: 781.461.3113 ©2006–2008 Analog Devices, Inc. All rights reserved. FEATURES Isolated, full-duplex RS-485/RS-422 transceiver ±8 kV ESD protection on RS-485 input/output pins 16 Mbps data rate Complies with ANSI TIA/EIA-485-A-1998 and ISO 8482: 1987(E) Suitable for 5 V or 3 V operation (VDD1) High common-mode transient immunity: >25 kV/μs Receiver has open-circuit, fail-safe design 32 nodes on the bus Thermal shutdown protection Safety and regulatory approvals UL recognition: 5000 V rms isolation voltage for 1 minute per UL 1577 VDE certificate of conformity DIN EN 60747-5-2 (VDE 0884-10 Part 2): 2003-01 DIN EN 60950 (VDE 0805): 2001-12; EN 60950: 2000 VIORM = 848 V peak Operating temperature range: −40°C to +105°C Wide body, 16-lead SOIC package APPLICATIONS Isolated RS-485/RS-422 interfaces Industrial field networks INTERBUS Multipoint data transmission systems FUNCTIONAL BLOCK DIAGRAM VDD1 GND1 A B VDD2 GND2 Y Z TxD RxD ADM2490E Figure 1. GENERAL DESCRIPTION The ADM2490E is an isolated data transceiver with ±8 kV ESD protection that is suitable for high speed, full-duplex communi- cation on multipoint transmission lines. It is designed for balanced transmission lines and complies with ANSI TIA/EIA-485-A-1998 and ISO 8482: 1987(E). The device employs Analog Devices, Inc., iCoupler® technology to combine a 2-channel isolator, a three- state differential line driver, and a differential input receiver into a single package. The differential transmitter outputs and receiver inputs feature electrostatic discharge circuitry that provides protection to ±8 kV using the human body model (HBM). The logic side of the device can be powered with either a 5 V or a 3 V supply, whereas the bus side requires an isolated 5 V supply. The device has current-limiting and thermal shutdown features to protect against output short circuits and situations where bus contention could cause excessive power dissipation. The ADM2490E is available in a wide body, 16-lead SOIC package and operates over the −40°C to +105°C temperature range. |
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