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ADM3490E:  3.3 V, ±15 kV ESD-Protected, RS-485/RS-422 Transceiver (Full Duplex, 12Mbps)

Product Details


The ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E are 3.3 V low power data transceivers with ±15 kV ESD protection suitable for fulland 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 ADM3486E is a half-duplex transceiver that shares differential lines and has 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 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. 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 driver outputs of the ADM3486E are slew rate limited in order to reduce EMI and data errors caused by reflections from improperly terminated buses. The receiver has a failsafe feature which 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 commercial and industrial temperature ranges and are available in narrow 8-lead and 14-lead (ADM3491E) SOIC packages.

FEATURES and BENEFITS

  • TIA/EIA RS-485/RS-422 compliant
  • ±15 kV ESD-protection on RS-485 input/output pins
  • Data rates - ADM3490E/ADM3491E: 12 Mbps
  • Full duplex
  • 32 nodes on the bus
  • Receiver open-circuit, fail-safe design
  • Outputs high-Z when disabled or powered off
  • −7 V to +12 V common-mode input range
  • Thermal shutdown and short-circuit protection
  • Industry-standard 75176 pinout
  • 8-lead SOIC package

Functional Block Diagram for ADM3490E

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Documentation

Title Content Type File Type
ADM3483E/ADM3486E/ADM3488E/ADM3490E/ADM3491E: 3.3 V, ±15 kV ESD-Protected, Half- and Full-Duplex, RS-485/RS-422 Transceivers Data Sheet (Rev A, 10/2006) (pdf, 643 kB) Data Sheets PDF
AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format  (pdf, 671 kB) Application Notes PDF
AN-960: RS-485/RS-422 Circuit Implementation Guide  (pdf, 245 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

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADM3490E IBIS Model  (ibs) IBIS Models IBS

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

ADM3490E Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM3490EARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.51 $1.37 Y  Material Info Notify Me Purchase Sample
ADM3490EARZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $1.37 Y  Material Info Notify Me 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 (8-lead SOIC) Evaluation Board, EVAL-RS485FD8EBZ
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-RS485FD8EBZ Status: Production Evaluation Board $30.00 Yes -
ADM3071EARZ Status: Production 3.3V, Enhanced ESD, 250 kbps, 256 nodes, -40C to +85C $1.90 Yes -
ADM3071EYRZ Status: Last Time Buy 3.3V, Enhanced ESD, 250 kbps, 256 nodes, -40C to +125C $2.08 Yes -
ADM1490EBRZ Status: Production 5V, Enhanced ESD, 16 Mbps, 32 nodes, -40C to +85C $2.44 Yes -
ADM3074EARZ Status: Production 3.3V, Enhanced ESD, 500 kbps, 256 nodes, -40C to +85C $1.90 Yes -
ADM3074EYRZ Status: Production 3.3V, Enhanced ESD, 500 kbps, 256 nodes, -40C to +125C $2.08 Yes -
ADM3077EARZ Status: Production 3.3V, Enhanced ESD, 16 Mbps, 256 nodes, -40C to +85C $1.90 Yes -
ADM3077EYRZ Status: Production 3.3V, Enhanced ESD, 16 Mbps, 256 nodes, -40C to +125C $2.08 Yes -
ADM3488ARZ Status: Production 3.3V, 250 kbps, 32 nodes, -40C to +85C $1.21 Yes -
ADM3488EARZ Status: Production 3.3V, Enhanced ESD, 250 kbps, 32 nodes, -40C to +85C $1.59 Yes -
ADM3490ARZ Status: Production 3.3V, 10 Mbps, 32 nodes, -40C to +85C $1.42 Yes -
ADM3490EARZ Status: Production 3.3V, Enhanced ESD, 12 Mbps, 32 nodes, -40C to +85C $1.65 Yes -
ADM4854ARZ Status: Production 5V, 115 kbps, 256 nodes, -40 to +85C $0.91 Yes -
ADM4855ARZ Status: Production 5V, 500 kbps, 256 nodes, -40 to +85C $0.91 Yes -
ADM4856ARZ Status: Production 5V, 2.5 Mbps, 256 nodes, -40 to +85C $0.91 Yes -
ADM4857ARZ Status: Production 5V, 10 Mbps, 256 nodes, -40 to +85C $0.91 Yes -
ADM488ABRZ Status: Production 5V, 250 kbps, 32 nodes, -40 to +85C $1.91 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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