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ADM2682E_1107 датащи(PDF) 1 Page - Analog Devices |
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ADM2682E_1107 датащи(HTML) 1 Page - Analog Devices |
1 / 24 page 5 kV rms Signal and Power Isolated RS-485 Transceiver with ±15 kV ESD ADM2682E/ADM2687E Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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 ©2011 Analog Devices, Inc. All rights reserved. FEATURES 5 kV rms isolated RS-485/RS-422 transceiver, configurable as half or full duplex isoPower integrated isolated dc-to-dc converter ±15 kV ESD protection on RS-485 input/output pins Complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E) Data rate: 16 Mbps (ADM2682E), 500 kbps (ADM2687E) 5 V or 3.3 V operation Connect up to 256 nodes on one bus Open- and short-circuit, fail-safe receiver inputs High common-mode transient immunity: >25 kV/μs Thermal shutdown protection Safety and regulatory approvals UL recognition (pending) 5000 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice #5A (pending) IEC 60601-1: 400 V rms (basic), 250 V rms (reinforced) IEC 60950-1: 600 V rms (basic), 380 V rms (reinforced) VDE Certificates of Conformity (pending) DIN EN 60747-5-2 (VDE 0884 Part 2): 2003-01 VIORM = 846 V peak Operating temperature range: −40°C to +85°C 16-lead wide-body SOIC with >8 mm creepage and clearance APPLICATIONS Isolated RS-485/RS-422 interfaces Industrial field networks Multipoint data transmission systems FUNCTIONAL BLOCK DIAGRAM ADM2682E/ADM2687E TxD A B Y Z DE VCC RxD RE GND1 GND2 DECODE D R DECODE ENCODE OSCILLATOR RECTIFIER REGULATOR VISOOUT isoPower DC-TO-DC CONVERTER VISOIN DIGITAL ISOLATION iCoupler ENCODE ENCODE DECODE TRANSCEIVER ISOLATION BARRIER Figure 1. GENERAL DESCRIPTION The ADM2682E/ADM2687E are fully integrated 5 kV rms signal and power isolated data transceivers with ±15 kV ESD protection and are suitable for high speed communication on multipoint transmission lines. The ADM2682E/ADM2687E include an integrated 5 kV rms isolated dc-to-dc power supply that eliminates the need for an external dc-to-dc isolation block. They are designed for balanced transmission lines and comply with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E). The devices integrate Analog Devices, Inc., iCoupler® technology to combine a 3-channel isolator, a three-state differential line driver, a differential input receiver, and Analog Devices isoPower® dc-to-dc converter into a single package. The devices are powered by a single 5 V or 3.3 V supply, realizing a fully integrated signal and power isolated RS-485 solution. The ADM2682E/ADM2687E drivers have an active high enable. An active low receiver enable is also provided, which causes the receiver output to enter a high impedance state when disabled. The devices have current limiting and thermal shutdown features to protect against output short circuits and situations where bus contention may cause excessive power dissipation. The parts are fully specified over the industrial temperature range and are available in a highly integrated, 16-lead, wide- body SOIC package with >8 mm creepage and clearance. The ADM2682E/ADM2687E contain isoPower technology that uses high frequency switching elements to transfer power through the transformer. Special care must be taken during printed circuit board (PCB) layout to meet emissions standards. Refer to AN-0971 Application Note, Recommendations for Control of Radiated Emissions with isoPower Devices, for details on board layout considerations. |
Аналогичный номер детали - ADM2682E_1107 |
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Аналогичное описание - ADM2682E_1107 |
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