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ADM3088JR Fiches technique(PDF) 1 Page - Analog Devices |
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ADM3088JR Fiches technique(HTML) 1 Page - Analog Devices |
1 / 14 page PRELIMINARY TECHNICAL DATA a High-Speed(10Mbps),Fail-Safe,RS-485/RS-422 TransceiverswithSlew-Rate-Limiting and±15kVESD Protection ADM3082/ADM3085/ADM3088 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 2002 GENERAL DESCRIPTION The ADM3082/ADM3085/ADM3088 are high-speed RS-485/RS-422 transceivers consisting of one driver and one receiver per package. The devices feature fail-safe operation, ensuring a logic-high receiver output when the receiver in- puts are open-circuit or short-circuit. This guarantees that the receiver output will be high if all the transmitters on a terminated bus are disabled (high-impedance). The ADM3082 has a slew-rate limited driver to minimize electromagnetic interference (EMI) and reduce reflections caused by incorrectly terminated cables. This allows error- free transmission at data rates up to 115kbps. The ADM3085 offers a higher slew rate allowing data rates up to 500kbps, while the ADM3088 has a driver whose slew rate is not limited, allowing data rates up to 10Mbps. All devices in the family feature ±15kV electrostatic dis- charge (ESD) protection and high receiver input imped- ance (1/8 unit load), allowing up to 256 transceivers on the bus. The devices have low current drain of 375µA un- loaded, or fully loaded with the drivers disabled, and fea- ture an ultra-low power (1nA) shutdown mode. FEATURES Enhanced Slew Rate Limiting for Error-Free Data Transmission Fail-Safe Receiver Operation while Maintaining EIA/TIA-485 compatibility Low-Current (1nA) Shutdown Mode High Input Impedance — Up to 256 Transceivers on Bus ±15kV ESD Protection (Human Body Model) on RS-485 I/O pins Pin-Compatible with Industry Standard 75176 APPLICATIONS Enhanced Replacement for Industry-Standard Parts EMI-Sensitive Systems Level Translation LANs for Industrial Control Applications FUNCTIONAL BLOCK DIAGRAM 1 2 3 4 8 7 6 5 D R RO RE DE DI V CC B A GND AD M30 82/A D M308 5/AD M 3088 REV. PrA 02/02 |
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