ADM489:  Low Power, Slew Rate Limited RS-485, Contains an Additional Receiver and Driver Enable Control

The ADM488 and ADM489 are low power differential line transceiver suitable for communication on multipoint bus transmission lines.

They are intended for balanced data transmission and ...More

ADM489:  Low Power, Slew Rate Limited RS-485, Contains an Additional Receiver and Driver Enable Control

Product Description

The ADM488 and ADM489 are low power differential line transceiver suitable for communication on multipoint bus transmission lines.

They are intended for balanced data transmission and comply with both EIA Standards RS-485 and RS-422. Both products contains a single differential line driver and a single differential line receiver making them suitable for full duplex data transfer.

The ADM489 contains an additional receiver and driver enable control.

The input impedance is 12 kohms, allowing 32 transceivers to be connected on the bus.

The ADM488/ADM489 operates from a single +5 V ± 10% power supply. Excessive power dissipation caused by bus contention or by output shorting is prevented by a thermal shutdown circuit. This feature forces the driver output into a high impedance state if during fault conditions a significant temperature increase is detected in the internal driver circuitry.

The receiver contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating). The ADM488/ADM489 is fabricated on BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology.

The ADM488/ADM489 is fully specified over the industrial temperature range and is available in DIP, SOIC and TSSOP packages.

Features

  • Meets EIA RS-485 Standard
  • 250 kbps Data Rate
  • Single 5 V ± 10% Supply
  • –7 V to +12 V Bus Common-Mode Range
  • 12 kO Input Impedance
  • 2 kV EFT Protection Meets IEC1000-4-4
  • High EM Immunity Meets IEC1000-4-3
  • Reduced Slew Rate for Low EM Interference
  • Short Circuit Protection
  • Excellent Noise Immunity
  • 30 µA Supply Current

Diagrams

ADM489 Diagram
Functional Block Diagram for ADM489

Характеристики

ESD-Protection ---
Pwr Supply (Vnom) +5
Data Rate 250kbps
Full-Half Duplex Full
# of Nodes On Bus 32
Drvr/Rcvr Enable Yes
Fail Safe Open
Isolation V (rms) ---
Available Packages DIP,SOIC,SOP

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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