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

    Max Operating Temp (°C) 105Deg
    Insulation Rating (kVrms) 5kV rms
    # Ch 1
    Output Default State High

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    Part# Features # Ch Max Data Rate(Mbps) Resolution (Bits) Insulation Rating (kVrms) Isolation Voltage (Vrms) Max Operating Temp (°C) Pulse Width Distort (ns) Max Prop Delay (ns) Pos Supply Min Output Voltage (V) Max Output Voltage (V) Output Default State Serial Clock Package Output Power (mW) iCouplerType Price* (1000-4999)
    AD7400 Isolated Sigma-Delta Modulator - 10 16 - - - - - +4.5V to +5.5V - - - - 16-Lead SOIC - - $4.05
    AD7401 Isolated Sigma-Delta Modulator - 10 16 - - - - - +4.5V to +5.5V - - - - 16-Lead SOIC - - $4.05
    ADM2483 RS-485 Transceiver/Half Duplex 1 0.5 - 2.5 - 85 - - +2.7V to +5.5V 1.5 5 Z - 16-Lead SOIC - - $3.04
    ADM2485 RS-485 Transeiver 1 16 - 2.5 - 85 - - +2.7V to +5.5V 2.1 5 Z - 16-Lead SOIC - - $5.57
    ADM2486 RS-485 Transceiver/Half Duplex w/ Transformer Driver 1 20 - 2.5 - 85 - - +2.7V to +5.5V - - Z - 16-Lead SOIC - - $5.04
    ADM2490E RS-485 Transceiver/Full Duplex 1 16 - 5 - 105 - - +2.7V to +5.5V - - High - 16-Lead SOIC - - $4.55
    ADUM1100 Standard Digital Isolator 1 100 - 2.5 2.5 125 2 18 +3V to +5.5V 3 5.5 High - 8-Lead SOIC - Standard $1.63
    ADUM1200 Standard Digital Isolator 2 25 - 2.5 2500 105 3