ADM3488E:  3.3 V, ±15 kV ESD-Protected, 250kbps Full-Duplex Transceiver

The ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E are 3.3 V, low power data transceivers with ±15 kV ESD protection suitable for full- and half-duplex communication on multipoint bus transmission ...More

ADM3488E:  3.3 V, ±15 kV ESD-Protected, 250kbps Full-Duplex Transceiver

Product Description

The ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E 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 RS485 and RS-422. The ADM3483E/ADM3486E are half-duplex transceivers that share differential lines and have separate enable inputs for the driver and receiver. The full-duplex ADM3488E/ADM3490E/ADM3491E transceivers have dedicated differential line driver outputs and receiver inputs. The ADM3491E also features separate enable inputs for the driver and receiver.

The devices have a 12 kΩ receiver input impedance, which allows up to 32 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 driver outputs of the ADM3483E/ADM3486E/ADM3488E are slew rate limited, in order to reduce EMI and data errors caused by reflections from improperly terminated buses. The receiver has a fail-safe feature that ensures a logic high output when the inputs are floating. 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 temperature range and are available in 8-lead and 14-lead narrow SOIC packages.

Applications

  • Power/energy metering
  • Telecommunications
  • EMI-sensitive systems
  • Industrial control
  • Local area networks

    • Features

    • TIA/EIA RS-485/RS-422 compliant
    • ±15 kV ESD protection on RS-485 input/output pins
    • Data rates: ADM3483E/ADM3488E: 250 kbps
    • Half- and full-duplex options
    • Up to 32 nodes on the bus
    • Receiver open-circuit, fail-safe design
    • Outputs high-Z when disabled or powered off
    • Common-mode input range: −7 V to +12 V
    • Thermal shutdown and short-circuit protection
    • Industry-standard 75176 pinout
    • 8-lead and 14-lead narrow SOIC packages

    Diagrams

    ADM3488E Diagram
    Functional Block Diagram for ADM3488E

    Specifications

    Protocols RS-422,RS-485
    Pwr Supply (Vnom) +3.3
    #Tx 1
    # Rx 1
    Data Rate 250kbps
    Low Power Shutdown No
    Operating Temp Range -40 to +85

    Explore Other Products

    Part# Protocols Data Rate #Tx # Rx Pos Supply Supply Current (max) 15 kV ESD Low Pwr Shutdown Product Description Price* (1000-4999)
    ADM2482E RS-422, RS-485 16Mbps 2 2 +3 to +5.5 6mA Yes No High Speed, 2.5 kV Isolated RS-485 Transceivers with Integrated Transformer Driver $4.66
    ADM2484E RS-422, RS-485 500kbps 2 2 +3 to +5.5 2mA Yes No 500 kbps, ESD Protected, Half-/Full-Duplex, iCoupler, Isolated RS-485 Transceiver $3.04
    ADM2487E RS-422, RS-485 500kbps 2 2 +3 to +5.5 4mA Yes No 2.5 kV Isolated RS-485 Transceivers with Integrated Transformer Driver $3.64
    ADM2491E RS-422, RS-485 16Mbps 2 2 +3 to +5.5 n/a No No High Speed, ESD-Protected, Half-/Full-Duplex, iCoupler Isolated RS-485 Transceiver $4.76
    ADM3251E RS-232 460kbps 1 1 +4.5 to +5.5 110mA Yes No Isolated Single Channel, RS-232 Line Driver/Receiver $2.99
    ADM4850 RS-422, RS-485 115kbps 1 1 +4.75 to +5.25 160µA No Yes 5V, Slew Rate Limited, Half-Duplex, RS-485/RS-422 Transceivers $0.71
    ADM4854 RS-422, RS-485 115kbps 1 1 +4.75 to +5.25 160µA No No 5V, Slew Rate Limited, Full-Duplex, RS-485/RS-422 Transceivers $0.71
    ADM560 RS-232 116kbps 4 5 +3 to +3.6 5mA No Yes Ultralow Power, +3.3V, RS-232 Notebook PC Serial Port Drivers/Receivers $2.41
    ADM561 RS-232 116kbps 4 5 +3 to +3.6 5mA No Yes Ultralow Power, +3.3V, RS-232 Notebook PC Serial Port Drivers/Receivers $2.41
    ADM232L RS-232 120kbps 2 2 +4.5 to +5.5 13mA No No +5V Powered, CMOS RS-232 Drivers/Receivers $1.27
    ADM233L RS-232 120kbps 2 2 +4.75 to +5.25 13mA No No +5V Powered CMOS RS-232 Drivers/Receivers $2.79
    ADM202 RS-232 120kbps 2 2