ADUM3402:  Quad-Channel, Digital Isolator, Enhanced System-Level ESD Reliability

The ADuM340x* are 4-channel digital isolators based on the Analog Devices, Inc. iCoupler ® technology. Combining high speed CMOS and monolithic air core transformer technology, these isolation ...More

ADUM3402:  Quad-Channel, Digital Isolator, Enhanced System-Level ESD Reliability

Product Description

The ADuM340x* are 4-channel digital isolators based on the Analog Devices, Inc. iCoupler ® technology. Combining high speed CMOS and monolithic air core transformer technology, these isolation components provide outstanding performance characteristics superior to alternatives such as optocoupler devices.

iCoupler devices remove the design difficulties commonly associated with optocouplers. Typical optocoupler concerns regarding uncertain current transfer ratios, nonlinear transfer functions, and temperature and lifetime effects are eliminated with the simple iCoupler digital interfaces and stable performance characteristics. The need for external drivers and other discrete components is eliminated with these iCoupler products. Further-more, iCoupler devices consume one-tenth to one-sixth the power of optocouplers at comparable signal data rates.

The ADuM340x isolators provide four independent isolation channels in a variety of channel configurations and data rates (see the Ordering Guide). All models operate with the supply voltage on either side ranging from 2.7 V to 5.5 V, providing compatibility with lower voltage systems as well as enabling a voltage translation functionality across the isolation barrier. The ADuM340x isolators have a patented refresh feature that ensures dc correctness in the absence of input logic transitions and during power-up/power-down conditions.

In comparison to the ADuM140x isolators, the ADuM340x isolators contain various circuit and layout changes to provide increased capability relative to system-level IEC 61000-4-x testing (ESD/burst/surge). The precise capability in these tests for either the ADuM140x or ADuM340x products is strongly determined by the design and layout of the user’s board or module. For more information, see the AN-793 application note, ESD/Latch-Up Considerations with iCoupler Isolation Products.

Applications

  • General-purpose multichannel isolation
  • SPI/data converter isolation
  • RS-232/RS-422/RS-485 transceivers
  • Industrial field bus isolation

    • * Protected by U.S. Patents 5,952,849; 6,873,065; and 7,075,329. Other patents pending.

    Data Sheet, Rev. A, 6/07

    Features

    • Enhanced system-level ESD performance per IEC 61000-4-x
    • Bidirectional communication
    • 3 V/5 V level translation
    • High temperature operation: 105°C
    • High data rate: dc to 90 Mbps (NRZ)

    Low power operation

    • 5 V operation
      1.4 mA per channel maximum @ 0 Mbps to 2 Mbps
      4.3 mA per channel maximum @ 10 Mbps
      34 mA per channel maximum @ 90 Mbps
    • 3 V operation
      0.9 mA per channel maximum @ 0 Mbps to 2 Mbps
      2.4 mA per channel maximum @ 10 Mbps
      20 mA per channel maximum @ 90 Mbps
    • Precise timing characteristics
      2 ns maximum pulse width distortion
      2 ns maximum channel-to-channel matching
    • High common-mode transient immunity: >25 kV/μs
    • Output enable function
    • 16-lead SOIC wide body, RoHS-compliant package

    Safety and regulatory approvals

    • UL recognition: 2500 V rms for 1 minute per UL 1577
    • CSA Component Acceptance Notice #5A
    • VDE Certificate of Conformity
      DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
      VIORM = 560 V peak

    Diagrams

    ADuM3402 Diagram
    Functional Block Diagram for ADuM3402

    Specifications

    Max Operating Temp (°C) 105Deg
    Insulation Rating (kVrms) 2.5kV rms
    # Ch 4
    Max Prop Delay (ns) 32ns
    Min Output Voltage (V) 2.7V
    Max Output Voltage (V) 5.5kV
    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