ADM4850 Просмотр технического описания (PDF) - Analog Devices

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ADM4850

5 V, Slew-Rate Limited, Half-Duplex and Full-Duplex RS-485/RS-422 Transceivers

Analog Devices 

ADM4850/ADM4851/ADM4852/ADM4853/ADM4854/ADM4855/ADM4856/ADM4857

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Functional Block Diagrams............................................................. 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

ADM4850/ADM4854 Timing Specifications........................... 4

ADM4851/ADM4855 Timing Specifications........................... 4

ADM4852/ADM4856 Timing Specifications........................... 5

ADM4853/ADM4857 Timing Specifications........................... 5

Absolute Maximum Ratings............................................................ 6

ESD Caution.................................................................................. 6

Pin Configurations and Function Descriptions ........................... 7

Typical Performance Characteristics ............................................. 9

Test Circuits..................................................................................... 11

Switching Characteristics .............................................................. 12

Circuit Description......................................................................... 13

Slew-Rate Control ...................................................................... 13

Receiver Input Filtering............................................................. 13

Half-/Full-Duplex Operation ................................................... 13

High Receiver Input Impedance .............................................. 14

Three-State Bus Connection..................................................... 14

Shutdown Mode ......................................................................... 14

Fail-Safe Operation .................................................................... 14

Current Limit and Thermal Shutdown ................................... 14

Outline Dimensions ....................................................................... 15

Ordering Guide .......................................................................... 16

Automotive Product................................................................... 16

REVISION HISTORY

1/12—Rev. C to Rev. D

Change to Features Section ............................................................. 1

Changes to Ordering Guide .......................................................... 15

Added Automotive Products Section .......................................... 15

1/11—Rev. B to Rev. C

Change to Table 8, Pin 3 Description ............................................ 7

Changes to Figure 29...................................................................... 12

Changes to Ordering Guide .......................................................... 15

7/09—Rev. A to Rev. B

Added MSOP Package .................................................. Throughout

Changes to Table 2............................................................................ 3

Changes to Table 7............................................................................ 6

Added Figure 4; Renumbered Figures Sequentially..................... 7

Moved Typical Performance Characteristics Section .................. 8

Changes to Figure 24, Figure 27 ................................................... 11

Changes to Figure 29...................................................................... 12

Change to Shutdown Mode Section............................................. 13

Updated Outline Dimensions ....................................................... 14

Changes to Ordering Guide .......................................................... 15

4/09—Rev. 0 to Rev. A

Changes to Ordering Guide .......................................................... 15

10/04—Revision 0: Initial Version

Rev. D | Page 2 of 16

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