500 kbps, 5.7 kV RMS, Signal Isolated RS-485 Transceiver with 15 kV IEC ESD Data Sheet ADM2461E/ADM2463E FEATURES FUNCTIONAL BLOCK DIAGRAMS V V 5.7 kV rms, signal isolated RS-485/RS-422 transceiver DD1 DD2 Low radiated emissions, passes EN55032 Class B with margin ADM2461E on a 2-layer PCB DIGITAL ISOLATION RS-485 TRANSCEIVER Cable inversion smart feature RE Correction for reversed cable connection on A, B, Y, and Z bus RxD R pins while maintaining full receiver fail-safe ESD protection on the RS-485 A, B, Y, and Z bus pins DE B CABLE 12 kV IEC61000-4-2 contact discharge INVERT A 15 kV IEC61000-4-2 air discharge D Low speed 500 kbps data rate for EMI control TxD Flexible power supply inputs Primary V supply of 1.7 V to 5.5 V DD1 INV Isolated V supply of 3.0 V to 5.5 V DD2 Profibus compliant for 5 V V DD2 Wide 40C to +125C operating temperature range GND GND 1 2 ISOLATION High common-mode transient immunity: >250 kV/s BARRIER Short-circuit, open-circuit, and floating input receiver fail-safe Figure 1. ADM2461E Functional Block Diagram Supports 192 bus nodes (72 k receiver input impedance) V V DD1 DD2 Full hot swap support (glitch free power-up and power-down) ADM2463E Safety and regulatory approvals (pending) DIGITAL ISOLATION CSA Component Acceptance Notice 5A, DIN V VDE V 0884-11, RS-485 TRANSCEIVER RE UL 1577, CQC11-471543-2012, IEC 61010-1 A CABLE RxD R INVERT 16-lead, wide body, SOIC W package with >8.0 mm B creepage and clearance in standard pinout INVR APPLICATIONS Heating, ventilation, and air conditioning (HVAC) networks Z TxD D Industrial field buses Y Building automation DE Utility networks GND GND 1 2 ISOLATION BARRIER Figure 2. ADM2463E Functional Block Diagram GENERAL DESCRIPTION The ADM2461E/ADM2463E are 500 kbps, 5.7 kV rms, signal These devices are optimized for low speed over long cable runs isolated RS-485 transceivers that pass radiated emissions testing to and have a maximum data rate of 500 kbps. The high differential the EN55032 Class B standard with margin on a 2-layer printed output voltage makes these devices suitable for Profibus nodes circuit board (PCB). The ADM2461E/ADM2463E isolation when powered with 5 V on the V supply. The V primary DD2 DD1 barrier provides robust immunity to noise and system level EMC supply and V isolated supply both support a wide range of DD2 events. The devices are protected against 12 kV contact and voltages (1.7 V to 5.5 V and 3 V to 5.5 V, respectively). Half- 15 kV air IEC61000-4-2 electrostatic discharge (ESD) events duplex and full duplex device options are available in the industry on the RS-485 A, B, Y, and Z pins. The devices feature cable invert standard 16-lead, wide-body, standard SOIC W package with pins to allow quick correction of the reversed cable connection >8.0 mm creepage and clearance. on the A, B, Y, and Z bus pins while maintaining full receiver fail-safe performance. 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IEC 61000-4-2 ESD PROTECTION IEC 61000-4-2 ESD PROTECTION 21430-001 21430-002ADM2461E/ADM2463E Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 16 Applications ...................................................................................... 1 Robust Low Power Digital Isolator .......................................... 16 Functional Block Diagrams ............................................................. 1 High Driver Differential Output Voltage ............................... 16 General Description ......................................................................... 1 IEC61000-4-2 ESD Protection ................................................. 16 Revision History ............................................................................... 2 Truth Tables ................................................................................ 17 Specifications .................................................................................... 3 Receiver Fail-Safe ....................................................................... 17 Timing Specifications .................................................................. 4 Driver and Receiver Cable Inversion ...................................... 18 Package Characteristics ............................................................... 6 Hot Swap Inputs ......................................................................... 18 Regulatory Information ............................................................... 6 192 Transceivers on the Bus ..................................................... 18 Insulation and Safety Related Specifications ............................ 6 Driver Output Protection ......................................................... 18 DIN V VDE 0884-11 (VDE 0884-11) Insulation Characteristics Applications Information ............................................................. 19 (Pending) ........................................................................................ 7 PCB Layout and Electromagnetic Interference (EMI) ......... 19 Absolute Maximum Ratings ........................................................... 8 Maximum Data Rate vs. Ambient Temperature ................... 19 Thermal Resistance ...................................................................... 8 Isolated Profibus Solution ......................................................... 19 Electrostatic Discharge (ESD) Ratings ...................................... 8 EMC, EFT, and Surge Protection ............................................ 19 ESD Caution.................................................................................. 8 Insulation Lifetime ..................................................................... 19 Pin Configurations and Function Descriptions ........................... 9 Outline Dimensions ....................................................................... 21 Typical Performance Characteristics ........................................... 11 Ordering Guide .......................................................................... 21 Test Circuits and Switching Characteristics ............................... 15 REVISION HISTORY 6/2020Revision 0: Initial Version Rev. 0 Page 2 of 21