ADM3074E:  3.3V ±15kV ESD Protected Full Duplex Transceiver w/500kbps

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

ADM3074E:  3.3V ±15kV ESD Protected Full Duplex Transceiver w/500kbps

Product Description

The ADM3070E–ADM3078E are 3.3V, low power data transceivers with ±15kV ESD protection suitable for full and half duplex communication on multipoint bus transmission lines. They are designed for balanced data transmission and comply with TIA/EIA standards RS-485 and RS-422. The devices have a 1/8 unit load receiver input impedance which allows up to 256 transceivers on a bus. Since only one driver should be enabled at any time, the output of a disabled or powered down driver is three-stated to avoid overloading the bus.

The receiver inputs have a true failsafe 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.

The driver outputs are slew rate limited in order to reduce EMI and data errors caused by reflections from improperly terminated buses. Excessive power dissipation caused by bus contention or by output shorting is prevented with a thermal shutdown circuit.

The parts are fully specified over the industrial and automotive temperature ranges and are available in 8-lead and 14-lead SOIC packages.

Applications

  • Energy/Power Metering
  • Industrial Control
  • Lighting Systems
  • Telecommunications
  • Security Systems
  • Instrumentation

    • Features

    • TIA/EIA RS-485/RS-422 compliant
    • ±15kV ESD protection on RS-485 I/O pins
    • Data Rates: ADM3073E–ADM3075E – 500kbps
    • True failsafe receiver inputs
    • Up to 256 Nodes on the bus
    • Hot-Swap input structure on DE & RE pins
    • Reduced slew rates for low EMI
    • Outputs high-Z when disabled or powered-off
    • -7V to +12V common mode input range
    • Thermal shutdown and short circuit protection
    • 8-lead & 14-lead SOIC packages

    Diagrams

    ADM3074E Diagram
    Functional Block Diagram for ADM3074E

    技术指标

    Isolation V (rms) ---
    Available Packages SOIC
    ESD-Protection 15 kV
    Pwr Supply (Vnom) +3.3
    Data Rate 500kbps
    Full-Half Duplex Full
    # of Nodes On Bus 256
    Drvr/Rcvr Enable No
    Fail Safe Open, Short

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    订阅新产品资料
    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 $1.15 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 3.3 Full 15 kV 250kbps 256 No Open, Short ---