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ADM489A:  5 V, Slew-Rate Limited, Low Power, 250 kbps, Full Duplex EIA RS-485 Transceiver (with DE/RE)

Product Details


The ADM488A and ADM489A are low power, differential line transceivers suitable for communication on multipoint bus transmission lines. They are intended for balanced data transmission and comply with both RS-485 and RS-422 standards of the Electronics Industries Association (EIA). Both products contain a single differential line driver and a single differential line receiver, making them suitable for full-duplex data transfer. The ADM489A contains an additional receiver and driver enable control.

The input impedance is 12 kΩ, allowing 32 transceivers to be connected on the bus. The ADM488A/ADM489A operate from a single 5 V ± 10% power supply.

Excessive power dissipation that is caused by bus contention or 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 ADM488A/ADM489A are fabricated on BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology.

The ADM488A/ADM489A are fully specified over the industrial temperature range and are available in SOIC and MSOP packages.

Applications
  • Low power RS-485 and RS-422 systems
  • DTE-DCE interface
  • Packet switching
  • Local area networks
  • Data concentration
  • Data multiplexers
  • Integrated services digital network (ISDN)

FEATURES and BENEFITS

  • Complies with ANSI TIA/EIA-485-A-1998 and ISO 8482: 1987(E)
  • 250 kbps data rate
  • Single 5 V ± 10% supply
  • −7 V to +12 V bus common-mode range
  • Connect up to 32 nodes on the bus
  • Reduced slew rate for low EM interference
  • Short-circuit protection
  • 30 μA supply current

Functional Block Diagram

Enter values and click on PowerMe to find power solutions for this IC. PowerMe launch of ADIsimPower Voltage Regulator Design Tool
(Nominal) For IC being powered
Available System Voltage V Operating Voltage Rail V Load Current A

Documentation

Title Content Type File Type
ADM488A_ADM489A: Full-Duplex, Low Power,Slew Rate Limited, EIA RS-485 Transceivers Data Sheet (Rev A, 11/2010) (pdf, 281 kB) Data Sheets PDF
AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format  (pdf, 671 kB) Application Notes PDF
Solving Isolation Challenges in Industrial Automation
This webcast will discuss the role isolation plays in providing protection and reducing the system bit-error-rate, using the specific design challenges of an RS-485 network. Topics to be covered in this presentation will include: Why and when one should isolate, Types of isolation and their advantages, Design Considerations for an RS-485 node (and how this translates to design considerations for signal isolation) as well as many other topics.
Webcasts WEBCAST
Brochure: Motor and Power Control Solutions  (pdf) Overview PDF
Industrial Automation Solutions  (pdf, 6110 kB) Overview PDF
Emerging Energy Applications Solutions Bulletin, Volume 10, Issue 4  (pdf, 1496 kB) Solutions Bulletins PDF
Test & Instrumentation Solutions Bulletin, Volume 10, Issue 3  (pdf, 1334 kB) Solutions Bulletins PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

ADM489A Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM489ABRMZ Status: Production 10 ld MSOP 10 Ind Tube, 50 $1.29 $1.10 Y  Material Info PCN Purchase Sample
ADM489ABRMZ-REEL7 Status: Production 10 ld MSOP 10 Ind Reel, 1000 - $1.10 Y  Material Info PCN Purchase
ADM489ABRZ Status: Production 14 ld SOIC 14 Ind Tube, 56 $1.24 $1.05 Y  Material Info PCN Purchase Sample
ADM489ABRZ-REEL7 Status: Production 14 ld SOIC 14 Ind Reel, 1000 - $1.05 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

Standard RS-485 Full-Duplex (14-lead SOIC) Evaluation Board, EVAL-RS485FDEBZ
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-RS485FDEBZ Status: Production Evaluation Board $30.00 Yes -
ADM1491EBRZ Status: Production 5V, Enhanced ESD, 16 Mbps, 32 nodes, -40C to +85C $2.44 Yes -
ADM3070EARZ Status: Production 3.3V, Enhanced ESD, 250 kbps, 256 nodes, -40C to +85C $1.96 Yes -
ADM3070EYRZ Status: Production 3.3V, Enhanced ESD, 250 kbps, 256 nodes, -40C to +125C $2.15 Yes -
ADM3073EARZ Status: Production 3.3V, Enhanced ESD, 500 kbps, 256 nodes, -40C to +85C $1.96 Yes -
ADM3073EYRZ Status: Last Time Buy 3.3V, Enhanced ESD, 500 kbps, 256 nodes, -40C to +125C $2.15 Yes -
ADM3076EARZ Status: Production 3.3V, Enhanced ESD, 16 Mbps, 256 nodes, -40C to +85C $1.96 Yes -
ADM3076EYRZ Status: Production 3.3V, Enhanced ESD, 16 Mbps, 256 nodes, -40C to +125C $2.15 Yes -
ADM3491AR Status: Production 3.3V, 10 Mbps, 32 nodes, -40C to +85C, Not ROHS Compliant $4.27 No -
ADM3491ARZ Status: Production 3.3V, 10 Mbps, 32 nodes, -40C to +85C $3.69 Yes -
ADM3491EARZ Status: Production 3.3V, Enhanced ESD, 12 Mbps, 32 nodes, -40C to +85C $1.71 Yes -
ADM489ABRZ Status: Production 5V, 250 kbps, 32 nodes, -40 to +85C $2.22 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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