ADM3490

PRODUCTION

3.3 V, Low Power, RS-485/RS-422 Transceiver (Full Duplex, 10 Mbps)

Data Sheet (Rev. E) Product Selection Table

Part Models: 2
1ku List Price: Starting From $1.28

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Overview

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

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

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

Part Models: 2
1ku List Price: Starting From $1.28

Documentation

Data Sheet 1

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

Application Note 2

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

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

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
ADM3490ARZ	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM3490ARZ-REEL7	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Sep 20, 2017 - 17_0142 ADM3485, ADM3490 and ADM3491 Low Power, RS-485/RS-422 Transceiver Product Alternate Fabrication Foundry at ADI, Limerick, Ireland
		PCN17_0142_Form Material_Report Qualification Results Summary Detailed Change Description
ADM3490ARZ	PRODUCTION
ADM3490ARZ-REEL7	PRODUCTION
Nov 23, 2010 - 10_0004 Halogen Free Material Change for SOIC Narrow Body Products Assembled at Amkor
		PCN10_0004_Form Material_Report ADI0012 Reliability Report
ADM3490ARZ	PRODUCTION
ADM3490ARZ-REEL7	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Evaluation Kits

Standard RS-485 Full-Duplex (8-lead SOIC) Evaluation Board, EVAL-RS485FD8EBZ

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Product Details

The EVAL-RS485FD8EBZ allows quick and easy evaluation of full-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) and receiver output (RO). Bus signals A, B, Y and Z (full-duplex bus) can be connected to a bus screw terminal block. Termination resistors are fitted across A and B, as well as Y and Z. These can be connected in half-duplex configuration (A to Y, B to Z), in order to evaluate the RS-485 driver. Footprints are provided for pull-up and pull-down (biasing resistors) on the receiver inputs in order to provide the option to evaluate an RS-485 receiver with this configuration.

Devices for evaluation on the board must be ordered separately.

Resources

UG-543:Evaluation Boards for Full-Duplex and Half-Duplex RS-485 Transceivers (Rev.A)
4/19/2013

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