ADM487E

PRODUCTION

5 V, ±15 kV ESD Protected, Half Duplex RS-485/RS-422 Transceiver (250 kbps, ¼ Load)

Data Sheet (Rev. B) Product Selection Table

Part Models: 4
1ku List Price: Starting From $1.74

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Overview

TIA/EIA RS-485/RS-422 compliant
ESD protection on RS-485 I/O pins
±15 kV human body model
Data rates: 250 kbps
Half-duplex options

Reduced slew rates for low EMI
−7 V to +12 V common-mode input range
Thermal shutdown and short-circuit protection
8-lead SOIC packages

The ADM485E / ADM487E / ADM1487E are 5 V low power data transceivers with ±15 kV ESD protection suitable for halfduplex 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 ADM487E and the ADM1487E have a 1/4 unit load receiver input impedance that allows up to 128 transceivers on a bus, while the ADM485E allow up to 32 transceivers on a bus. Since only one driver is enabled at any time, the output of a disabled or powerdown driver is three-stated to avoid overloading the bus.

The driver outputs are slew rate-limited in order to reduce EMI and data errors caused by reflections from improperly terminated buses. Excessive power dissipation caused by bus contention or output shorting is prevented with a thermal shutdown circuit. The parts are fully specified over the industrial temperature ranges and are available in 8-lead SOIC packages.

APPLICATIONS

Energy/power metering
Lighting systems
Industrial control
Telecommunications
Security systems
Instrumentation

Part Models: 4
1ku List Price: Starting From $1.74

Documentation

Data Sheet 1

ADM485E/ADM487E/ADM1487E: 5 V, 15 kV ESD Protected Half-Duplex, RS-485/RS-422 Transceivers Data Sheet (Rev.B) 10/28/2010

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
ADM487EARZ	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM487EARZ-REEL7	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM487EWARZ	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADM487EWARZ-REEL7	8-Lead SOIC	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 23, 2013 - 13_0105 Notification of Qualification of Alternate fab foundry for RS-485/RS-422 Transceiver die at ADI, Limerick, Ireland
		PCN13_0105_Form Material_Report Qualification Plan Summary Package Outline Drawing
ADM487EARZ	PRODUCTION
ADM487EARZ-REEL7	PRODUCTION
Jul 20, 2012 - 12_0105 Halogen Free Material Change for Select SOIC Narrow and Wide Body Products Assembled at Amkor
		PCN12_0105_Form Material_Report Qualification Report Summary
ADM487EARZ	PRODUCTION
ADM487EARZ-REEL7	PRODUCTION
ADM487EWARZ	PRODUCTION
ADM487EWARZ-REEL7	PRODUCTION
Feb 3, 2010 - 09_0256 Jiangsu Changjiang Electronics Technology Co. Ltd. (JCET), China as additional assembly and test sub-contractor for Narrow Body SOIC.
		Material Set Changes Material_Report PCN09_0256_Form Summary of Supporting data
ADM487EARZ	PRODUCTION
ADM487EARZ-REEL7	PRODUCTION
Nov 1, 2014 - 14_0219 RS-485/RS-422 Transceiver products alternate Fabrication foundry at ADI, Limerick, Ireland
		PCN14_0219_Form Material_Report Qualification Results Summary Flow Chart
ADM487EWARZ	PRODUCTION
ADM487EWARZ-REEL7	PRODUCTION

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

Evaluation Kits

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

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Product Details

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

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

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