ADM3485
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ADM3485

3.3 V, Low Power, RS-485/RS-422 Transceiver (Half Duplex, 10 Mbps, Driver/Receiver Enable)

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Features
  • Operate with 3.3 V supply
  • Interoperable with 5 V logic
  • EIA RS-485/RS-422 Compliant over Full Common-Range
  • Data Rate Options: 10 Mbps
  • Half and Full Duplex Options
  • 2nA Supply Current in Shutdown Mode
  • Up to 32 Transceivers on a Bus
  • −7V to +12V Bus Common Mode Range
  • Specified over −40°C to +85°C Temperature Range
  • 8 ns skew
  • Available in 8-Lead SOIC
Additional Details
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The ADM3483 / ADM3485 / ADM3488 / ADM3490 / ADM3491 are low power, differential line transceivers designed to operate using a single 3.3 V power supply. Low power consumption, coupled with a shutdown mode, makes the ADM3483 / ADM3485 / ADM3488 / ADM3490 / ADM3491 ideal for power-sensitive applications.

The ADM3488 / ADM3490 / ADM3491 feature full-duplex communication, while the ADM3483 / ADM3485 are designed for half-duplex communication.

The ADM3485 / ADM3490 / ADM3491 transmit at up to 10 Mbps. The receiver input impedance is 12 kΩ, allowing up to 32 transceivers to be connected on the bus. A thermal shutdown circuit prevents excessive power dissipation caused by bus contention or by output shorting. If a significant temperature increase is detected in the internal driver circuitry during fault conditions, then the thermal shutdown circuit forces the driver output into a high impedance state. If the inputs are unconnected (floating), the receiver contains a fail-safe feature that results in a logic high output state. The parts are fully specified over the commercial and industrial temperature ranges. The ADM3483 / ADM3485 / ADM3488 / ADM3490 are available in 8-lead SOIC_N; the ADM3491 is available in a 14-lead SOIC_N.

APPLICATIONS

  • Low-Power RS-485 Applications
  • Telecom
  • Industrial Process Control
  • HVAC
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file View Data Sheet (Rev.E)
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IBIS Model ADM3485 IBIS Model Download
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1ku List Price Starting From $1.01
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ADM3485

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Data Sheet

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UPDATED 11/13/2006
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ADM3483/ADM3485/ADM3488/ADM3490/ADM3491: 3.3V Slew Rate Limited, Half and Full Duplex, RS-485/RS-422 Transceivers Data Sheet (Rev.E)

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Application Note

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UPDATED 02/07/2014
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AN-1176: Component Footprints and Symbols in the Binary .Bxl File Format redirect icon

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UPDATED 02/07/2014
Chinese
AN-1176: 二进制.Bxl文件格式的元件尺寸和符号 redirect icon

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UPDATED 07/09/2020
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AN-960: RS-485/RS-422 Circuit Implementation Guide redirect icon

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UPDATED 07/09/2020
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AN-960：RS-485/RS-422电路实施指南 redirect icon

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UPDATED 07/09/2020
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AN-960: RS-485/RS-422 回路の実装ガイド redirect icon

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Documentation

Product Selection Guide 1

Digital Isolation and Interface Technology Selection Guide

Analog Dialogue 1

Safeguard Your RS-485 Communication Networks from Harmful EMC Events

Webcast 1

Solving Isolation Challenges in Industrial Automation

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2020-10-28

01:00

Protect your Innovations: from High Precision to High Power

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
ADM3485ARZ 8-Lead SOIC external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
ADM3485ARZ-REEL7 8-Lead SOIC external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link

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Product Lifecycle

PCN

Jul 24, 2017

- 17_0142

ADM3485 and ADM3491 Low Power, RS-485/RS-422 Transceiver Product Alternate Fabrication Foundry at ADI, Limerick, Ireland

ADM3485ARZ

PRODUCTION

ADM3485ARZ-REEL7

PRODUCTION

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PCN17_0142_Form

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Material_Report

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Qualification Results Summary

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Detailed Change Description

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Nov 23, 2010

- 10_0004

Halogen Free Material Change for SOIC Narrow Body Products Assembled at Amkor

ADM3485ARZ

PRODUCTION

ADM3485ARZ-REEL7

PRODUCTION

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PCN10_0004_Form

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Material_Report

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ADI0012 Reliability Report

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Product Lifecycle

PCN

Jul 24, 2017

- 17_0142

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ADM3485 and ADM3491 Low Power, RS-485/RS-422 Transceiver Product Alternate Fabrication Foundry at ADI, Limerick, Ireland

ADM3485ARZ

PRODUCTION

ADM3485ARZ-REEL7

PRODUCTION

pdf

PCN17_0142_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

pdf

Detailed Change Description

external-icon
Nov 23, 2010

- 10_0004

arrow down

Halogen Free Material Change for SOIC Narrow Body Products Assembled at Amkor

ADM3485ARZ

PRODUCTION

ADM3485ARZ-REEL7

PRODUCTION

pdf

PCN10_0004_Form

external-icon

xls

Material_Report

Download

pdf

ADI0012 Reliability Report

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Software & Part Ecosystem

Parts Product Life Cycle Description
ADM3065E
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PRODUCTION

3.0 V to 5.5 V, ±12 kV IEC ESD Protected, Half Duplex 50 Mbps RS-485 Transceiver

Evaluation Kits 1

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EVAL-RS485HDEBZ

Standard RS-485 Half-Duplex Evaluation Board, EVAL-RS485HDEBZ

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EVAL-RS485HDEBZ

Standard RS-485 Half-Duplex Evaluation Board, EVAL-RS485HDEBZ

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EVAL-RS485HDEBZ
Standard RS-485 Half-Duplex Evaluation Board, EVAL-RS485HDEBZ
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Product Detail

The EVAL-RS485HDEBZ allows quick and easy evaluation of half-duplex RS-485 transceivers with standard 8-lead SOIC footprints. The evaluation board allows interfacing via screw terminal block to digital I/O for driver input (DI), receiver output (RO), driver enable (DE) and receiver output (RO). Bus signals A and B (half-duplex bus) can be connected to a bus screw terminal block. One or two termination resistors can be connected to A and B via jumper settings, in order to evaluation the half-duplex RS-485 driver and receiver. Footprints are provided for pull-up and pull-down (biasing resistors) on the bus.

Devices for evaluation on the board must be ordered separately.

Resources

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UG-543:Evaluation Boards for Full-Duplex and Half-Duplex RS-485 Transceivers (Rev.A) Download

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Evaluation Kits1

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EVAL-RS485HDEBZ

Standard RS-485 Half-Duplex Evaluation Board, EVAL-RS485HDEBZ

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