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ADM2482E:  2.5 kV Signal Isolated, ESD Protected, Full/Half Duplex RS-485 Transceiver w/ Transformer Driver (16 Mbps)

Product Details

The ADM2482E/ADM2487E are isolated data transceivers with ±15 kV ESD protection and are suitable for high speed, half-duplex or full-duplex communication on multipoint transmission lines. For half-duplex operation, the transmitter outputs and receiver inputs share the same transmission line. Transmitter Output Pin Y is linked externally to Receiver Input Pin A, and Transmitter Output Pin Z to Receiver Input Pin B. The parts are designed for balanced transmission lines and comply with TIA/EIA- 485-A-98 and ISO 8482:1987(E). The devices employ the Analog Devices, Inc., iCoupler® technology to combine a 3-channel isolator, a three-state differential line driver, and a differential input receiver into a single package. An on-chip oscillator outputs a pair of square waveforms that drive an external transformer to provide isolated power. The logic side of the device can be powered with either a 5 V or a 3.3 V supply, and the bus side is powered with an isolated 3.3 V supply.

The ADM2482E/ADM2487E driver has an active high enable, and the receiver has an active low enable. The driver output enters a high impedance state when the driver enable signal is low. The receiver output enters a high impedance state when the receiver enable signal is high.

The device has current-limiting and thermal shutdown features to protect against output short circuits and situations where bus contention might cause excessive power dissipation. The part is fully specified over the industrial temperature range of −40°C to +85°C and is available in a 16-lead, wide-body SOIC package.


  • Isolated RS-485/RS-422 interfaces
  • Industrial field networks
  • Multipoint data transmission systems
  • Data Sheet, Rev. 0, 3/09


    • Isolated RS-485/RS-422 transceiver, configurable as half or full duplex
    • Integrated oscillator driver for external transformer
    • ±15 kV ESD protection on RS485 input/output pins
    • Complies with TIA/EIA-485-A-98 and ISO 8482:1987(E)
    • Data rate: 16 Mbps
    • 5 V or 3.3 V operation (VDD1)
    • 256 nodes on bus
    • True fail-safe receiver inputs
    • Safety and regulatory approval
      -UL recognition: 2500 V rms for 1 minute per UL 1577
      -VDE certificates of conformity
      -DIN VVDE V 0884-10 (VDE V 0884-10):2006-12
      -VIORM = 560 V peak
    • Thermal shutdown protection
    • Operating temperature range: −40°C to +85°C
    • Wide-body, 16-lead SOIC package

    Functional Block Diagram for ADM2482E

    Enter values and click on PowerMe to find power solutions for this IC. PowerMe launch of ADIsimPower Voltage Regulator Design Tool
    (Nominal) For IC being powered
    Available System Voltage V Operating Voltage Rail V Load Current A


    Title Content Type File Type
    ADM2482E/ADM2487E: 2.5 kV Isolated RS-485 Transceivers with Integrated Transformer Driver Data Sheet  (Rev A, 02/2009) (pdf, 709 kB) Data Sheets PDF
    AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format  (pdf, 671 kB) Application Notes PDF
    AN-960: RS-485/RS-422 Circuit Implementation Guide  (pdf, 245 kB) Application Notes PDF
    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.
    Webcasts WEBCAST
    Solving Isolation Challenges in Industrial Automation
    This webcast will discuss the role isolation plays in providing protection and reducing the system bit-error-rate, using the specific design challenges of an RS-485 network. Topics to be covered in this presentation will include: Why and when one should isolate, Types of isolation and their advantages, Design Considerations for an RS-485 node (and how this translates to design considerations for signal isolation) as well as many other topics.
    Webcasts WEBCAST
    UG-210: Evaluation Boards for the ADM2482E and ADM2487E Isolated RS-485 Transceivers  (pdf, 299 kB) User Guides PDF
    High-Performance Multichannel Power-Line Monitoring with Simultaneous-Sampling ADCs
    By Colm Slattery, Analog Devices, Inc. (Analog Dialogue, Vol. 41, January 2007)
    Analog Dialogue HTML
    MS-2127: Designing with iCoupler Digital Isolators in Solar PV Inverters  (pdf, 141 kB) Technical Articles PDF
    Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with Quad-Channel Isolators Design Summary  (pdf, 291 kB)
    By Flow Zhao, Design Engineer
    Technical Articles PDF
    NAppkin Note: Lowering the Power of the ADuM524x  (pdf, 223 kB)
    By Mark Cantrell, Senior Applications Engineer
    Technical Articles PDF
    Digital Isolator Product Selection and Resource Guide  (pdf, 640 kB) Product Selection Guide PDF
    Analog Devices Achieves Major Milestone by Shipping 1 Billionth Channel of iCoupler Digital Isolation (19 Sep 2013) Press Releases HTML
    Brochure: Motor and Power Control Solutions  (pdf) Overview PDF
    2008 Medical Solution Profile  (pdf, 126 kB)
    High Performance ICs for Medical Imaging, Patient Monitoring, and Instrumentation
    Overview PDF
    Industrial Automation Solutions  (pdf, 6110 kB) Overview PDF
    Emerging Energy Applications Solutions Bulletin, Volume 10, Issue 4  (pdf, 1496 kB) Solutions Bulletins PDF
    Test & Instrumentation Solutions Bulletin, Volume 10, Issue 3  (pdf, 1334 kB) Solutions Bulletins PDF
    How do I learn about new iCoupler products? FAQs/RAQs HTML
    Are iCoupler products Pb-free? FAQs/RAQs HTML
    Can I replace an optocoupler with an iCoupler product in an existing design? FAQs/RAQs HTML
    What are some of the distinguishing features of the iCoupler products? FAQs/RAQs HTML
    What communications protocols are supported by iCoupler products? FAQs/RAQs HTML
    What are the different types of iCoupler products? FAQs/RAQs HTML
    Do iCoupler products have VDE certification for reinforced insulation? FAQs/RAQs HTML
    With which regulatory standards do iCoupler products comply? FAQs/RAQs HTML
    How much isolation can iCoupler products provide? FAQs/RAQs HTML
    What are the benefits of iCoupler technology? FAQs/RAQs HTML
    What is iCoupler technology? FAQs/RAQs HTML
    What types of technologies have been used to provide isolation? FAQs/RAQs HTML
    What are optocouplers? What is optical isolation? FAQs/RAQs HTML
    What is capacitive isolation? FAQs/RAQs HTML
    What regulatory standards address isolation products? FAQs/RAQs HTML
    What is isolation? Why is it needed? FAQs/RAQs HTML
    What are common applications that use isolation? FAQs/RAQs HTML
    How is isolation specified? FAQs/RAQs HTML
    What is isolation rating? FAQs/RAQs HTML
    What is the relationship between working voltage and isolation rating? FAQs/RAQs HTML
    What is the difference between basic and double (or reinforced) insulation levels? FAQs/RAQs HTML
    What are transient immunity and common-mode rejection? FAQs/RAQs HTML
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    RAQs index Rarely Asked Questions HTML
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    Evaluation Kits & Symbols & Footprints

    Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

    Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

    SampleSample & Buy

    Price, packaging, availability

    ADM2482E Model Options
    Model Package Pins Temp.
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    ADM2482EBRWZ Status: Production 16 ld SOIC - Wide 16 Ind Tube, 47 $4.60 $4.00 Y  Material Info PCN Purchase Sample
    ADM2482EBRWZ-REEL7 Status: Production 16 ld SOIC - Wide 16 Ind Reel, 400 - $4.00 Y  Material Info PCN Purchase
    Price Table Help

    The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

    ezLINX™ iCoupler® Isolated Interface Development Environment
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    EZLINX-IIIDE-EBZ Status: Production iCoupler® Isolated Interface Development Environment Evaluation Board $149.00 Yes -
    ADM2482E Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    EVAL-ADM2482EEB3Z Status: Production Evaluation Board $75.00 Yes -
    EVAL-ADM2482EEB5Z Status: Production Evaluation Board $75.00 Yes -

    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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