ADUM2402:  Quad-Channel Digital Isolator

The ADuM240x* are 4-channel digital isolators based on Analog Devices, Inc., iCoupler® technology. Combining high speed CMOS and monolithic air core transformer technology, these isolation ...More

ADUM2402:  Quad-Channel Digital Isolator

Product Description

The ADuM240x* are 4-channel digital isolators based on Analog Devices, Inc., iCoupler® technology. Combining high speed CMOS and monolithic air core transformer technology, these isolation components provide outstanding performance characteristics that are superior to alternatives, such as optocoupler devices.

By avoiding the use of LEDs and photodiodes, iCoupler devices remove the design difficulties commonly associated with opto-couplers. The 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. Furthermore, iCoupler devices run at one-tenth to one-sixth the power of optocouplers at comparable signal data rates.

The ADuM240x isolators provide four independent isolation channels in a variety of channel configurations and data rates (see the Ordering Guide). The ADuM240x models operate with the supply voltage of 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. In addition, the ADuM240x provide low pulse width distortion (<2 ns for CRWZ grade) and tight channel-to-channel matching (<2 ns for CRWZ grade). Unlike other optocoupler alternatives, the ADuM240x isolators have a patented refresh feature that ensures dc correctness in the absence of input logic transitions and during power-up/power-down conditions.

Applications

  • General-purpose, high voltage, multichannel isolation
  • Medical equipment
  • Motor drives
  • Power supplies

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

    Features

    Low power operation

    • 5 V operation - Please see data sheet
    • 3 V operation - Please see data sheet
    • Bidirectional communication
    • 3 V/5 V level translation
    • High temperature operation: 105°C
    • High data rate: dc to 90 Mbps (NRZ)
    • Precise timing characteristics
      2 ns maximum pulse width distortion
      2 ns maximum channel-to-channel matching
    • Please see data sheet for additional features

    Diagrams

    ADuM2402 Diagram
    Functional Block Diagram for ADuM2402

    Specifications

    Max Operating Temp (°C) 105Deg
    Insulation Rating (kVrms) 5kV rms
    # Ch 4
    Pulse Width Distort (ns) 3ns
    Max Prop Delay (ns) 32ns
    Min Output Voltage (V) 2.7V
    Max Output Voltage (V) 5.5V
    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