5 kV rms Signal and Power Isolated RS-485 Transceiver with 15 kV ESD Protection Data Sheet ADM2682E/ADM2687E FEATURES FUNCTIONAL BLOCK DIAGRAM V V CC ISOOUT 5 kV rms isolated RS-485/RS-422 transceiver, configurable as half or full duplex isoPower DC-TO-DC CONVERTER isoPower integrated isolated dc-to-dc converter OSCILLATOR RECTIFIER 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) V ISOIN REGULATOR 5 V or 3.3 V operation V CC Connect up to 256 nodes on one bus Open- and short-circuit, fail-safe receiver inputs TRANSCEIVER DIGITAL ISOLATION iCoupler High common-mode transient immunity: >25 kV/s Y Thermal shutdown protection ENCODE DECODE D TxD Z Safety and regulatory approvals UL recognition 5000 V rms for 1 minute per UL 1577 ENCODE DECODE DE CSA Component Acceptance Notice 5A (pending) IEC 60601-1: 400 V rms (basic), 250 V rms (reinforced) A RxD DECODE R ENCODE IEC 60950-1: 600 V rms (basic), 380 V rms (reinforced) B VDE Certificates of Conformity DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12 RE ADM2682E/ADM2687E V = 846 V peak IORM Operating temperature range: 40C to +85C GND GND 1 2 ISOLATION BARRIER 16-lead wide-body SOIC with >8 mm creepage and clearance Figure 1. APPLICATIONS Isolated RS-485/RS-422 interfaces Industrial field networks Multipoint data transmission systems GENERAL DESCRIPTION The ADM2682E/ADM2687E are fully integrated 5 kV rms The ADM2682E/ADM2687E drivers have an active high enable. signal and power isolated data transceivers with 15 kV ESD An active low receiver enable is also provided, which causes the protection and are suitable for high speed communication on receiver output to enter a high impedance state when disabled. multipoint transmission lines. The ADM2682E/ADM2687E The devices have current limiting and thermal shutdown include an integrated 5 kV rms isolated dc-to-dc power supply features to protect against output short circuits and situations that eliminates the need for an external dc-to-dc isolation block. where bus contention may cause excessive power dissipation. They are designed for balanced transmission lines and comply The parts are fully specified over the industrial temperature with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E). range and are available in a highly integrated, 16-lead, wide- body SOIC package with >8 mm creepage and clearance. The devices integrate Analog Devices, Inc., iCoupler technology to combine a 3-channel isolator, a three-state differential line driver, a The ADM2682E/ADM2687E contain isoPower technology that differential input receiver, and Analog Devices isoPower dc-to-dc uses high frequency switching elements to transfer power through converter into a single package. The devices are powered by a the transformer. Special care must be taken during printed circuit board (PCB) layout to meet emissions standards. Refer to single 5 V or 3.3 V supply, realizing a fully integrated signal and AN-0971 Application Note, Recommendations for Control of power isolated RS-485 solution. Radiated Emissions with isoPower Devices, for details on board layout considerations. Rev. C 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20112015 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com 09927-001ADM2682E/ADM2687E Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Switching Characteristics .............................................................. 15 Applications ....................................................................................... 1 Circuit Description......................................................................... 16 Functional Block Diagram .............................................................. 1 Signal Isolation ........................................................................... 16 General Description ......................................................................... 1 Power Isolation ........................................................................... 16 Revision History ............................................................................... 2 Truth Tables................................................................................. 16 Specifications ..................................................................................... 3 Thermal Shutdown .................................................................... 16 ADM2682E Timing Specifications ............................................ 4 Open- and Short-Circuit, Fail-Safe Receiver Inputs.............. 16 ADM2687E Timing Specifications ............................................ 4 DC Correctness and Magnetic Field Immunity........................... 16 Package Characteristics ............................................................... 4 Applications Information .............................................................. 18 Regulatory Information ............................................................... 5 PCB Layout ................................................................................. 18 Insulation and Safety-Related Specifications ............................ 5 EMI Considerations ................................................................... 18 VDE 0884-10 Insulation Characteristics ................................... 6 Insulation Lifetime ..................................................................... 19 Absolute Maximum Ratings ............................................................ 7 Isolated Supply Considerations ................................................ 19 ESD Caution .................................................................................. 7 Typical Applications ................................................................... 20 Pin Configuration and Function Descriptions ............................. 8 Outline Dimensions ....................................................................... 22 Typical Performance Characteristics ............................................. 9 Ordering Guide .......................................................................... 22 Test Circuits ..................................................................................... 14 REVISION HISTORY 6/15Rev. B to Rev. C Changes to Figure 1 .......................................................................... 1 11/13Rev. A to Rev. B Change to Features Section ............................................................. 1 Change to Table 5 ............................................................................. 5 Changes to VDE 0884-10 Insulation Characteristics Section .... 6 6/13Rev. 0 to Rev. A Updated UL and VDE Certification (Throughout) ..................... 1 Updated Outline Dimensions ....................................................... 22 Changes to Ordering Guide .......................................................... 22 7/11Revision 0: Initial Version Rev. C Page 2 of 24