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ADM2484E Dataheets PDF



Part Number ADM2484E
Manufacturers Analog Devices
Logo Analog Devices
Description Isolated RS-485 Transceiver
Datasheet ADM2484E DatasheetADM2484E Datasheet (PDF)

Data Sheet 500 kbps, ESD Protected, Half-/Full-Duplex, iCoupler, Isolated RS-485 Transceiver ADM2484E FEATURES Isolated, RS-485/RS-422 transceiver, configurable as half- or full-duplex ±15 kV ESD protection on RS-485 input/output pins 500 kbps data rate Complies with ANSI TIA/EIA RS-485-A-1998 and ISO 8482: 1987(E) Suitable for 5 V or 3.3 V operation (VDD1) High common-mode transient immunity: >25 kV/μs True fail-safe receiver inputs 256 nodes on the bus Thermal shutdown protection Safety and .

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Data Sheet 500 kbps, ESD Protected, Half-/Full-Duplex, iCoupler, Isolated RS-485 Transceiver ADM2484E FEATURES Isolated, RS-485/RS-422 transceiver, configurable as half- or full-duplex ±15 kV ESD protection on RS-485 input/output pins 500 kbps data rate Complies with ANSI TIA/EIA RS-485-A-1998 and ISO 8482: 1987(E) Suitable for 5 V or 3.3 V operation (VDD1) High common-mode transient immunity: >25 kV/μs True fail-safe receiver inputs 256 nodes on the bus Thermal shutdown protection Safety and regulatory approvals UL recognition 5000 V rms isolation voltage for 1 minute per UL1577 VDE certificate of conformity DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12 Reinforced insulation, VIORM = 849 VPEAK CSA Component Acceptance Notice 5A IEC 60950-1: 390 V rms (reinforced) Operating temperature range: −40°C to +85°C Wide body, 16-lead SOIC package APPLICATIONS Isolated RS-485/RS-422 interfaces Industrial field networks INTERBUS Multipoint data transmission systems GENERAL DESCRIPTION The ADM2484E is an isolated data transceiver with ±15 kV ESD protection suitable for high speed, half- or full-duplex communication on multipoint transmission lines. For halfduplex operation, the transmitter outputs and receiver inputs share the same transmission line. Transmitter Output Pin Y links externally to Receiver Input Pin A, and Transmitter Output Pin Z links externally to Receiver Input Pin B. Designed for balanced transmission lines, the ADM2484E complies with ANSI TIA/EIA RS-485-A-1998 and ISO 8482: 1987(E). The device employs Analog Devices, Inc., iCoupler® technology to combine a 3-channel isolator, a three-state differential line driver, and a differential input receiver into a single package. GALVANIC ISOLATION 06984-001 FUNCTIONAL BLOCK DIAGRAM VDD1 VDD2 ADM2484E DE TxD RxD RE GND1 Figure 1. GND2 Y Z A B The differential transmitter outputs and receiver inputs feature electrostatic discharge circuitry that provides protection up to ±15 kV using the human body model (HBM). The logic side of the device can be powered with either a 5 V or a 3.3 V supply, whereas the bus side requires an isolated 3.3 V supply. The device has current-limiting and thermal shutdown features to protect against output short circuits and situations where bus contention causes excessive power dissipation. Rev. G Document Feedback 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 ©2008–2018 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com ADM2484E TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications .................................................................. 4 Package Characteristics ............................................................... 4 Regulatory Information............................................................... 4 Insulation and Safety-Related Specifications............................ 5 VDE 0884 Insulation Characteristics ........................................ 5 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Typical Performance Characteristics ............................................. 8 REVISION HISTORY 5/2018—Rev. F to Rev. G Change to Features Section ............................................................. 1 Changes to Table 4............................................................................ 4 11/2015—Rev. E to Rev. F Added Table 8; Renumbered Sequentially .................................... 6 3/2015—Rev. D to Rev. E Changes to CTI Value and Isolation Group, Table 5 ................... 5 3/2014—Rev. C to Rev. D Changes to Features Section............................................................ 1 Changed VIORM from 846 VPEAK to 849 VPEAK, Table 4.


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