Features and Benefits

  • 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

Product Details

The ADM2490E is an isolated data transceiver with ±8 kV ESD protection that is suitable for high speed, full-duplex communication 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.


  • Isolated RS-485/RS-422 Interfaces
  • Industrial Field Networks
  • Multipoint Data Transmission Systems

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Documentation & Resources

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  • Data Sheets (1)
  • Application Notes (7)
  • User Guides (1)
  • Frequently Asked Questions (1)
  • Safety and Regulatory Compliance (1)
  • Product Selection Guide (1)
  • Technical Articles (2)
  • Videos (1)
  • Press Releases (1)
  • Webcasts (2)
  • Application Notes
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    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.