ADM2490E:  High Speed ESD Protected Full-Duplex iCoupler® Isolated RS-485 Transceiver

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 ...More

ADM2490E:  High Speed ESD Protected Full-Duplex iCoupler® Isolated RS-485 Transceiver

Product 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.

Application

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

    • Data Sheet, Rev. A, 8/08

    Features

    • Isolated Full Duplex RS-485/RS-422 Transceiver
    • ±8 kV ESD Protection on RS-485 I/O Pins
    • 16 Mbps Data Rate
    • Complies with ANSI TIA/EIA RS-485-A-1998 and ISO 8482:1987(E)
    • High Common Mode Transient Immunity: >25kV/ μs
    • Suitable for 5 V or 3 V Operation (VDD1)
    • Receiver Open-circuit Fail-safe Design
    • Thermal Shutdown Protection
    • Safety and Regulatory Approvals (See Data Sheet for Details)
    • Operating Temperature Range: -40° to 105°C
    • Wide Body 16-lead SOIC package

    Diagrams

    ADM2490E Diagram
    Functional Block Diagram for ADM2490E

    Specifications

    Isolation V (rms) 5 kV
    Available Packages SOIC
    ESD-Protection 8 kV
    Pwr Supply (Vnom) +3 to +5 & ISO +5
    Data Rate 16Mbps
    Full-Half Duplex Full
    # of Nodes On Bus 32
    Drvr/Rcvr Enable No
    Fail Safe Open

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    Part# Min Pos Supply Pwr Supply (Vnom) Full-Half Duplex ESD-Protection Data Rate # of Nodes On Bus Drvr/Rcvr Enable Fail Safe Isolation V (rms) Available Packages Price* (1000-4999) Protocols
    ADM2482E +3 +3 to +5 & ISO +3 Full, Half 15 kV 16Mbps 256 Yes Open, Short 2.5 kV SOIC $4.66 RS-422, RS-485
    ADM2484E +3 +3 to +5 & ISO +3 Full, Half 15 kV 500kbps 256 Yes Open, Short 5 kV SOIC $3.04 RS-422, RS-485
    ADM2487E +3 +3 to +5 & ISO +3 Full, Half 15 kV 500kbps 256 Yes Open, Short 2.5 kV SOIC $3.64 RS-422, RS-485
    ADM2491E +3 +3 to +5 & ISO +5 Full, Half 8 kV 16Mbps 32 Yes Open 5 kV SOIC $4.76 RS-422, RS-485
    ADN4667 +3 3.3 --- 15 kV 400Mbps - Yes - - SOIC, SOP $1.16 RS-485/LVDS
    ADN4668 +3 3.3 --- 15 kV 400Mbps - Yes - - SOIC, SOP $1.16 RS-485/LVDS
    ADM2490E +2.7 +3 to +5 & ISO +5 Full 8 kV 16Mbps 32 No Open 5 kV SOIC $4.55 RS-422, RS-485
    ADM2483 +2.7 +3 to +5 & ISO +5 Half --- 500kbps 256 Yes Open, Short 2.5 kV SOIC $3.04 RS-485
    ADM2485 +2.7 +3 to +5 & ISO +5 Half --- 16Mbps 50 Yes Open 2.5 kV SOIC $5.57 RS-422, RS-485
    ADM2486 +2.7 +3 to +5 & ISO +5 Half --- 20Mbps 50 Yes Open 2.5 kV SOIC $5.04 RS-485
    ADM3070E +3 3.3 Full 15 kV 250kbps 256 Yes Open, Short --- SOIC $1.62 RS-422, RS-485
    ADM3071E +3