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ADM3073E Dataheets PDF



Part Number ADM3073E
Manufacturers Analog Devices
Logo Analog Devices
Description RS-485/RS-422 Transceivers
Datasheet ADM3073E DatasheetADM3073E Datasheet (PDF)

3.3 V, ±15 kV ESD-Protected, Half- and Full-Duplex, RS-485/RS-422 Transceivers ADM3070E/ADM3071E/ADM3072E/ADM3073E/ADM3074E/ADM3075E/ADM3076E/ADM3077E/ADM3078E FEATURES TIA/EIA RS-485/RS-422 compliant ±15 kV ESD protection on RS-485 input/output pins Data rates ADM3070E/ADM3071E/ADM3072E: 250 kbps ADM3073E/ADM3074E/ADM3075E: 500 kbps ADM3076E/ADM3077E/ADM3078E: 16 Mbps Half- and full-duplex options True fail-safe receiver inputs Up to 256 nodes on the bus −40°C to +125°C temperature option Hot-.

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3.3 V, ±15 kV ESD-Protected, Half- and Full-Duplex, RS-485/RS-422 Transceivers ADM3070E/ADM3071E/ADM3072E/ADM3073E/ADM3074E/ADM3075E/ADM3076E/ADM3077E/ADM3078E FEATURES TIA/EIA RS-485/RS-422 compliant ±15 kV ESD protection on RS-485 input/output pins Data rates ADM3070E/ADM3071E/ADM3072E: 250 kbps ADM3073E/ADM3074E/ADM3075E: 500 kbps ADM3076E/ADM3077E/ADM3078E: 16 Mbps Half- and full-duplex options True fail-safe receiver inputs Up to 256 nodes on the bus −40°C to +125°C temperature option Hot-swap input structure on DE and RE pins Reduced slew rates for low EMI Low power shutdown current (all except ADM3071E/ ADM3074E/ADM3077E) Outputs high-Z when disabled or powered off Common-mode input range: −7 V to +12 V Thermal shutdown and short-circuit protection 8-lead and 14-lead narrow SOIC packages APPLICATIONS Power/energy metering Industrial control Lighting systems Telecommunications Security systems Instrumentation GENERAL DESCRIPTION The ADM307xE 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 they comply with TIA/EIA standards: RS-485 and RS-422. The devices have a ⅛ unit load receiver input impedance, which allows up to 256 transceivers on a bus. Because only one driver should be enabled at any time, the output of a disabled or powereddown driver is tristated to avoid overloading the bus. The receiver inputs have a true fail-safe feature, which eliminates the need for external bias resistors and ensures a logic high output level when the inputs are open or shorted. This guarantees that the receiver outputs are in a known state before communication begins and when communication ceases. FUNCTIONAL BLOCK DIAGRAMS VCC ADM3070E/ ADM3073E/ ADM3076E RO R RE DE DI D A B Z Y 06285-001 GND Figure 1. VCC ADM3071E/ ADM3074E/ ADM3077E A RO R B 06285-002 DI D Z Y GND Figure 2. VCC ADM3072E/ ADM3075E/ ADM3078E RO R RE DE DI D A B GND Figure 3. 06285-003 Rev. E Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2006–2009 Analog Devices, Inc. All rights reserved. ADM3070E/ADM3071E/ADM3072E/ADM3073E/ADM3074E/ADM3075E/ADM3076E/ADM3077E/ADM3078E TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagrams............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 4 Timing Specifications— ADM3070E/ADM3071E/ADM3072E....................................... 5 Timing Specifications— ADM3073E/ADM3074E/ADM3075E....................................... 6 Timing Specifications— ADM3076E/ADM3077E/ADM3078E....................................... 7 Absolute Maximum Ratings............................................................ 8 ESD Caution.................................................................................. 8 Pin Configurations and Function Descriptions ........................... 9 Test Circuits and Switching Characteristics................................ 10 REVISION HISTORY 8/09—Rev. D to Rev. E Changes to Ordering Guide .......................................................... 20 4/09—Rev. C to Rev. D Changes to Ordering Guide .......................................................... 20 1/09—Rev. B to Rev. C Changes to Ordering Guide .......................................................... 20 8/08—Rev. A to Rev. B Changes to Table 3............................................................................ 5 Changes to Figure 36...................................................................... 18 Updated Outline Dimensions ....................................................... 19 Changes to Ordering Guide .......................................................... 20 10/06—Rev. 0 to Rev. A Added ADM3077E and ADM3078E ...............................Universal Changes to Figure 2 and Figure 3................................................... 1 Changes to Figure 5 and Figure 6.............


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