ADM3078E:  3.3V ±15kV ESD Protected Half Duplex Driver/Receiver Enable Transceiver w/16Mbps

The ADM3070E to ADM3078E are 3.3 V, low power data transceivers with ±15 kV ESD protection suitable for full- and half-duplex communication on multipoint bus transmission lines. They are designed for ...More

ADM3078E:  3.3V ±15kV ESD Protected Half Duplex Driver/Receiver Enable Transceiver w/16Mbps

Product Description

The ADM3070E to ADM3078E are 3.3 V, low power data transceivers with ±15 kV ESD protection suitable for full- and half-duplex communication on multipoint bus transmission lines. They are designed for balanced data transmission, and they comply with TIA/EIA standards RS-485 and RS-422.

The devices have an ⅛ unit load receiver input impedance, which allows up to 256 transceivers on a bus. Because only one driver should be enabled at any time, the output of a disabled or powered-down driver is tristated to avoid overloading the bus.

The receiver inputs have a true fail-safe feature, which eliminates the need for external bias resistors and ensures a logic high output level when the inputs are open or shorted. This guarantees that the receiver outputs are in a known state before communication begins and when communication ceases.

Applications

  • Power/energy metering
  • Industrial control
  • Lighting systems
  • Telecommunications
  • Security systems
  • Instrumentation

    • Features

    • TIA/EIA RS-485/RS-422 compliant
    • ±15 kV ESD protection on RS-485 input/output pins
    • Data rates: ADM3076E/ADM3077E/ADM3078E: 16 Mbps
    • Half- and full-duplex options
    • True fail-safe receiver inputs
    • Up to 256 nodes on the bus
    • −40°C to +125°C temperature option
    • Hot-swap input structure on DE and REpins
    • Reduced slew rates for low EMI
    • Low power shutdown current
    • Outputs high-Z when disabled or powered off
    • Common-mode input range: −7 V to +12 V

    Diagrams

    • Enlarge
    • Symbols and Footprints
    ADM3078E Diagram
    Functional Block Diagram for ADM3078E

    Specifications

    Protocols RS-422,RS-485
    Pwr Supply (Vnom) +3.3
    #Tx 1
    # Rx 1
    Data Rate 16Mbps
    Low Power Shutdown Yes
    Operating Temp Range -40 to +125

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