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 comply with TIA/EIA standards RS-485 and RS-422. The ADM3483E/ADM3486E are 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 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 commercial and industrial temperature ranges and are available in narrow 8-lead and 14-lead (ADM3491E) SOIC packages.
|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|
|AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format (pdf, 671 kB)||Application Notes|
|AN-960: RS-485/RS-422 Circuit Implementation Guide (pdf, 245 kB)||Application Notes|
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.
|Brochure: Motor and Power Control Solutions (pdf)||Overview|
|Industrial Automation Solutions (pdf, 6110 kB)||Overview|
|Emerging Energy Applications Solutions Bulletin, Volume 10, Issue 4 (pdf, 1496 kB)||Solutions Bulletins|
|Test & Instrumentation Solutions Bulletin, Volume 10, Issue 3 (pdf, 1334 kB)||Solutions Bulletins|
|RAQs index||Rarely Asked Questions||HTML|
|Glossary of EE Terms||Glossary||HTML|
Evaluation board for evaluating the RS485
The ezLINX™ iCoupler® Isolated Interface Development Environment provides developers with a cost-effective, plug and play method for evaluation eight physical layer, digitally-isolated communication standards.
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.
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.