ADM2587

Signal and Power Isolated RS-485 Transceiver with ±15 kV ESD Protection ADM2582E/ADM2587E Rev. 0 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. Trademarks and registered trademarks are the property of their respective owners. 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 ©2009 Analog Devices, Inc. All rights reserved. FEATURES 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) ADM2582E data rate: 16 Mbps ADM2587E data rate: 500 kbps 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 (pending) UL recognition: 2500 V rms for 1 minute per UL 1577 VDE Certificates of Conformity DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 VIORM = 560 V peak Operating temperature range: −40°C to +85°C Highly integrated, 20-lead, wide-body SOIC package APPLICATIONS Isolated RS-485/RS-422 interfaces Industrial field networks Multipoint data transmission systems FUNCTIONAL BLOCK DIAGRAM ADM2582E/ADM2587E TxD A B Y Z DE VCC RxD RE ISOLATION BARRIER TRANSCEIVER GND1 GND2 ENCODE ENCODE DECODE DECODE D R DECODE ENCODE OSCILLATOR RECTIFIER REGULATOR VISOOUT DIGITAL ISOLATION iCoupler isoPower DC-TO-DC CONVERTER VISOIN 08 11 1- 00 1 Figure 1. GENERAL DESCRIPTION The ADM2582E/ADM2587E are fully integrated signal and power isolated data transceivers with ±15 kV ESD protection and are suitable for high speed communication on multipoint transmission lines. The ADM2582E/ADM2587E include an integrated isolated dc-to-dc power supply, which 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 ADM2582E/ADM2587E driver has an active high enable. An active low receiver enable is also provided that 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, 20-lead, wide- body SOIC package. The ADM2582E/ADM2587E 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 Application Note AN-0971, Control of Radiated Emissions with isoPower Devices, for details on board layout considerations. 查询"ADM2587EBRWZ"供应商 ADM2582E/ADM2587E Rev. 0 | Page 2 of 20 TABLE OF CONTENTS Features .............................................................................................. 1  Applications ....................................................................................... 1  Functional Block Diagram .............................................................. 1  General Description ......................................................................... 1  Revision History ............................................................................... 2  Specifications ..................................................................................... 3  ADM2582E Timing Specifications ............................................ 4  ADM2587E Timing Specifications ............................................ 4  ADM2582E/ADM2587E Package Characteristics ................... 4  ADM2582E/ADM2587E Regulatory Information .................. 5  ADM2582E/ADM2587E Insulation and Safety-Related Specifications ................................................................................ 5  ADM2582E/ADM2587E VDE 0884 Insulation Characteristics (Pending) ............................................................ 5  Absolute Maximum Ratings ............................................................ 6  ESD Caution .................................................................................. 6  Pin Configuration and Function Descriptions ............................. 7  Typical Performance Characteristics ............................................. 8  Test Circuits ..................................................................................... 12  Switching Characteristics .............................................................. 13  Circuit Description......................................................................... 14  Signal Isolation ........................................................................... 14  Power Isolation ........................................................................... 14  Truth Tables................................................................................. 14  Thermal Shutdown .................................................................... 14  Open- and Short-Circuit, Fail-Safe Receiver Inputs.............. 14  DC Correctness and Magnetic Field Immunity ........................... 15  Applications Information .............................................................. 16  PCB Layout ................................................................................. 16  EMI Considerations ................................................................... 16  Insulation Lifetime ..................................................................... 16  Isolated Power Supply Considerations .................................... 17  Typical Applications ................................................................... 19  Outline Dimensions ....................................................................... 20  Ordering Guide .......................................................................... 20  REVISION HISTORY 9/09—Revision 0: Initial Version 查询"ADM2587EBRWZ"供应商 ADM2582E/ADM2587E Rev. 0 | Page 3 of 20 SPECIFICATIONS All voltages are relative to their respective ground; 3.0 ≤ VCC ≤ 5.5 V. All minimum/maximum specifications apply over the entire recommended operation range, unless otherwise noted. All typical specifications are at TA = 25°C, VCC = 5 V unless otherwise noted. Table 1. Parameter Symbol Min Typ Max Unit Test Conditions ADM2587E SUPPLY CURRENT ICC Data Rate ≤ 500 kbps 90 mA VCC = 3.3 V, 100 Ω load between Y and Z 72 mA VCC = 5 V, 100 Ω load between Y and Z 125 mA VCC = 3.3 V, 54 Ω load between Y and Z 98 mA VCC = 5 V, 54 Ω load between Y and Z 120 mA 120 Ω load between Y and Z ADM2582E SUPPLY CURRENT ICC Data Rate = 16 Mbps 150 mA 120 Ω load between Y and Z 230 mA 54 Ω load between Y and Z ISOLATED SUPPLY VOLTAGE VISOUT 3.3 DRIVER Differential Outputs Differential Output Voltage, Loaded |VOD2| 2.0 5.0 V RL = 100 Ω (RS-422), see Figure 23 1.5 5.0 V RL = 54 Ω (RS-485), see Figure 23 |VOD3| 1.5 5.0 V −7 V ≤ VTEST1 ≤ 12 V, see Figure 24 Δ|VOD| for Complementary Output States Δ|VOD| 0.2 V RL = 54 Ω or 100 Ω, see Figure 23 Common-Mode Output Voltage VOC 3.0 V RL = 54 Ω or 100 Ω, see Figure 23 Δ|VOC| for Complementary Output States Δ|VOC| 0.2 V RL = 54 Ω or 100 Ω, see Figure 23 Short-Circuit Output Current IOS 200 mA Output Leakage Current (Y, Z) IO 30 μA DE = 0 V, RE = 0 V, VCC = 0 V or 3.6 V, VIN = 12 V −30 μA DE = 0 V, RE = 0 V, VCC = 0 V or 3.6 V, VIN = −7 V Logic Inputs DE, RE, TxD Input Threshold Low VIL 0.3 × VCC V DE, RE, TxD Input Threshold High VIH 0.7 × VCC V DE, RE, TxD Input Current II −10 0.01 10 μA DE, RE, TxD RECEIVER Differential Inputs Differential Input Threshold Voltage VTH −200 −125 −30 mV −7 V < VCM < +12 V Input Voltage Hysteresis VHYS 15 mV VOC = 0 V Input Current (A, B) II 125 μA DE = 0 V, VCC = 0 V or 3.6 V, VIN = 12 V −100 μA DE = 0 V, VCC = 0 V or 3.6 V, VIN = -7 V Line Input Resistance RIN 96 kΩ −7 V < VCM < +12 V Logic Outputs Output Voltage Low VOL 0.2 0.4 V IO = 1.5 mA, VA − VB = −0.2 V Output Voltage High VOH VCC − 0.3 VCC − 0.2 V IO = −1.5 mA, VA − VB = 0.2 V Short-Circuit Current 100 mA COMMON-MODE TRANSIENT IMMUNITY1 25 kV/μs VCM = 1 kV, transient magnitude = 800 V 1 CM is the maximum common-mode voltage slew rate that can be sustained while maintaining specification-compliant operation. VCM is the common-mode potential difference between the logic and bus sides. The transient magnitude is the range over which the common-mode is slewed. The common-mode voltage slew rates apply to both rising and falling common-mode voltage edges. 查询"ADM2587EBRWZ"供应商 ADM2582E/ADM2587E Rev. 0 | Page 4 of 20 ADM2582E TIMING SPECIFICATIONS TA = −40°C to +85°C. Table 2. Parameter Symbol Min Typ Max Unit Test Conditions DRIVER Maximum Data Rate 16 Mbps Propagation Delay, Low to High tDPLH 63 100 ns RL = 54 Ω, CL1 = C L2 = 100 pF, see Figure 25 and Figure 29 Propagation Delay, High to Low tDPHL 64 100 ns RL = 54 Ω, CL1 = C L2 = 100 pF, see Figure 25 and Figure 29 Output Skew tSKEW 1 8 ns RL = 54 Ω, CL1 = CL2 = 100 pF, see Figure 25 and Figure 29 Rise Time/Fall Time tDR, tDF 15 ns RL = 54 Ω, CL1 = CL2 = 100 pF, see Figure 25 and Figure 29 Enable Time tZL, tZH 120 ns RL = 110 Ω, CL = 50 pF, see Figure 26 and Figure 31 Disable Time tLZ, tHZ 150 ns RL = 110 Ω, CL = 50 pF, see Figure 26 and Figure 31 RECEIVER Propagation Delay, Low to High tRPLH 94 110 ns CL = 15 pF, see Figure 27 and Figure 30 Propagation Delay, High to Low tRPHL 95 110 ns CL = 15 pF, see Figure 27 and Figure 30 Output Skew1 tSKEW 1 12 ns CL = 15 pF, see Figure 27 and Figure 30 Enable Time tZL, tZH 15 ns RL = 1 kΩ, CL = 15 pF, see Figure 28 and Figure 32 Disable Time tLZ, tHZ 15 ns RL = 1 kΩ, CL = 15 pF, see Figure 28 and Figure 32 1 Guaranteed by design. ADM2587E TIMING SPECIFICATIONS TA = −40°C to +85°C. Table 3. Parameter Symbol Min Typ Max Unit Test Conditions DRIVER Maximum Data Rate 500 kbps Propagation Delay, Low to High tDPLH 250 503 700 ns RL = 54 Ω, CL1 = C L2 = 100 pF, see Figure 25 and Figure 29 Propagation Delay, High to Low tDPHL 250 510 700 ns RL = 54 Ω, CL1 = C L2 = 100 pF, see Figure 25 and Figure 29 Output Skew tSKEW 7 100 ns RL = 54 Ω, CL1 = CL2 = 100 pF, see Figure 25 and Figure 29 Rise Time/Fall Time tDR, tDF 200 1100 ns RL = 54 Ω, CL1 = CL2 = 100 pF, see Figure 25 and Figure 29 Enable Time tZL, tZH 2.5 μs RL = 110 Ω, CL = 50 pF, see Figure 26 and Figure 31 Disable Time tLZ, tHZ 200 ns RL = 110 Ω, CL = 50 pF, see Figure 26 and Figure 31 RECEIVER Propagation Delay, Low to High tRPLH 91 200 ns CL = 15 pF, see Figure 27 and Figure 30 Propagation Delay, High to Low tRPHL 95 200 ns CL = 15 pF, see Figure 27 and Figure 30 Output Skew tSKEW 4 30 ns CL = 15 pF, see Figure 27 and Figure 30 Enable Time tZL, tZH 15 ns RL = 1 kΩ, CL = 15 pF, see Figure 28 and Figure 32 Disable Time tLZ, tHZ 15 ns RL = 1 kΩ, CL = 15 pF, see Figure 28 and Figure 32 ADM2582E/ADM2587E PACKAGE CHARACTERISTICS Table 4. Parameter Symbol Min Typ Max Unit Test Conditions Resistance (Input-to-Output)1 RI-O 1012 Ω Capacitance (Input-to-Output)1 CI-O 3 pF f = 1 MHz Input Capacitance2 CI 4 pF Input IC Junction-to-Case Thermal Resistance θJCI 33 °C/W Thermocouple located at center of package underside Output IC Junction-to-Case Thermal Resistance θJCO 28 °C/W Thermocouple located at center of package underside 1 Device considered a 2-terminal device: short together Pin 1 to Pin 10 and short together Pin 11 to Pin 20. 2 Input capacitance is from any input data pin to ground. 查询"ADM2587EBRWZ"供应商 ADM2582E/ADM2587E Rev. 0 | Page 5 of 20 ADM2582E/ADM2587E REGULATORY INFORMATION Table 5. Pending ADM2582E/ADM2587E Approvals Organization Approval Type Notes UL To be recognized under the Component Recognition Program of Underwriters Laboratories, Inc. In accordance with UL 1577, each ADM2582E/ADM2587E is proof tested by applying an insulation test voltage ≥ 3000 V rms for 1 second. VDE To be certified according to DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 In accordance with VDE 0884-10, each ADM2582E/ADM2587E is proof tested by applying an insulation test voltage ≥ 1050 VPEAK for 1 second. ADM2582E/ADM2587E INSULATION AND SAFETY-RELATED SPECIFICATIONS Table 6. Parameter Symbol Value Unit Conditions Rated Dielectric Insulation Voltage 2500 V rms 1-minute duration Minimum External Air Gap (Clearance) L(I01) >8.0 mm Measured from input terminals to output terminals, shortest distance through air Minimum External Tracking (Creepage) L(I02) >8.0 mm Measured from input terminals to output terminals, shortest distance along body Minimum Internal Gap (Internal Clearance) 0.017 min mm Insulation distance through insulation Tracking Resistance (Comparative Tracking Index) CTI >175 V DIN IEC 112/VDE 0303-1 Isolation Group IIIa Material Group (DIN VDE 0110: 1989-01, Table 1) ADM2582E/ADM2587E VDE 0884 INSULATION CHARACTERISTICS (PENDING) This isolator is suitable for basic electrical isolation only within the safety limit data. Maintenance of the safety data must be ensured by means of protective circuits. Table 7. Description Conditions Symbol Characteristic Unit CLASSIFICATIONS Installation Classification per DIN VDE 0110 for Rated Mains Voltage ≤150 V rms I to IV ≤300 V rms I to III ≤400 V rms I to II Climatic Classification 40/85/21 Pollution Degree DIN VDE 0110, see Table 1 2 VOLTAGE Maximum Working Insulation Voltage VIORM 560 V peak Input-to-Output Test Voltage VPR Method b1 VIORM × 1.875 = VPR, 100% production tested, tm = 1 sec, partial discharge < 5 pC 1050 V peak Method a After Environmental Tests, Subgroup 1 VIORM × 1.6 = VPR, tm = 60 sec, partial discharge < 5 pC 896 V peak After Input and/or Safety Test, Subgroup 2/Subgroup 3 VIORM × 1.2 = VPR, tm = 60 sec, partial discharge < 5 pC 672 V peak Highest Allowable Overvoltage Transient overvoltage, tTR = 10 sec VTR 4000 V peak SAFETY-LIMITING VALUES Maximum value allowed in the event of a failure Case Temperature TS 150 °C Input Current IS, INPUT 265 mA Output Current IS, OUTPUT 335 mA Insulation Resistance at TS VIO = 500 V RS >109 Ω 查询"ADM2587EBRWZ"供应商 ADM2582E/ADM2587E Rev. 0 | Page 6 of 20 ABSOLUTE MAXIMUM RATINGS TA = 25°C, unless otherwise noted. All voltages are relative to their respective ground. Table 9. Maximum Continuous Working Voltage1 Parameter Max Unit Reference Standard AC Voltage Bipolar Waveform 424 V peak 50-year minimum lifetime Unipolar Waveform Basic Insulation 600 V peak Maximum approved working voltage per IEC 60950-1 (pending) Reinforced Insulation 560 V peak Maximum approved working voltage per IEC 60950-1 and VDE V 0884-10 (pending) DC Voltage Basic Insulation 600 V peak Maximum approved working voltage per IEC 60950-1(pending) Reinforced Insulation 560 V peak Maximum approved working voltage per IEC 60950-1 and VDE V 0884-10 (pending) Table 8. Parameter Rating VCC −0.5 V to +7 V Digital Input Voltage (DE, RE, TxD) −0.5 V to VDD + 0.5 V Digital Output Voltage (RxD) −0.5 V to VDD + 0.5 V Driver Output/Receiver Input Voltage −9 V to +14 V Operating Temperature Range −40°C to +85°C Storage Temperature Range −55°C to +150°C ESD (Human Body Model) on A, B, Y, and Z pins ±15 kV ESD (Human Body Model) on Other Pins ±2 kV Lead Temperature Soldering (10 sec) 260°C Vapor Phase (60 sec) 215°C Infrared (15 sec) 220°C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 1 Refers to continuous voltage magnitude imposed across the isolation barrier. See the Insulation Lifetime section for more details. ESD CAUTION 查询"ADM2587EBRWZ"供应商 ADM2582E/ADM2587E Rev. 0 | Page 7 of 20 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS GND1 1 VCC 2 GND1 3 RxD 4 GND220 VISOIN19 A18 B17 RE 5 GND216 DE 6 Z15 TxD 7 GND214 VCC 8 Y13 GND1 9 VISOOUT12 GND1 10 GND211 NOTES 1. PIN 12 AND PIN 19 MUST BE CONNECTED EXTERNALLY. ADM2582E ADM2587E TOP VIEW (Not to Scale) 08 11 1- 00 2 Figure 2. Pin Configuration Table 10. Pin Function Description Pin No. Mnemonic Description 1 GND1 Ground, Logic Side. 2 VCC Logic Side Power Supply. It is recommended that a 0.1 μF and a 10 μF decoupling capacitor be fitted between Pin 2 and Pin 1. 3 GND1 Ground, Logic Side. 4 RxD Receiver Output Data. This output is high when (A − B) > 200 mV and low when (A − B) < –200 mV. The output is tristated when the receiver is disabled, that is, when RE is driven high. 5 RE Receiver Enable Input. This is an active-low input. Driving this input low enables the receiver; driving it high disables the receiver. 6 DE Driver Enable Input. Driving this input high enables the driver; driving it low disables the driver. 7 TxD Driver Input. Data to be transmitted by the driver is applied to this input. 8 VCC Logic Side Power Supply. It is recommended that a 0.1 μF and a 0.01 μF decoupling capacitor be fitted between Pin 8 and Pin 7. 9 GND1 Ground, Logic Side. 10 GND1 Ground, Logic Side. 11 GND2 Ground, Bus Side. 12 VISOOUT Isolated Power Supply Output. This pin must be connected externally to VISOIN. It is recommended that a reservoir capacitor of 10 μF and a decoupling capacitor of 0.1 μF be fitted between Pin 12 and Pin 11. 13 Y Driver Noninverting Output 14 GND2 Ground, Bus Side. 15 Z Driver Inverting Output 16 GND2 Ground, Bus Side. 17 B Receiver Inverting Input. 18 A Receiver Noninverting Input. 19 VISOIN Isolated Power Supply Input. This pin must be connected externally to VISOOUT. It is recommended that a 0.1 μF and a 0.01 μF decoupling capacitor be fitted between Pin 19 and Pin 20. 20 GND2 Ground, Bus Side. 查询"ADM2587EBRWZ"供应商 ADM2582E/ADM2587E Rev. 0 | Page 8 of 20 TYPICAL PERFORMANCE CHARACTERISTICS 20 0 40 60 80 100 120 140 160 180 –40 –15 10 35 60 8 SU PP LY C U R R EN T, I C C (m A ) TEMPERATURE (°C) 5 NO LOAD RL = 120Ω RL = 54Ω 08 11 1- 10 3 Figure 3. ADM2582E Supply Current (ICC) vs. Temperature (Data Rate = 16 Mbps, DE = 3.3 V, VCC = 3.3 V) 20 0 40 60 80 100 120 140 –40 –15 10 35 60 85 SU PP LY C U R R EN T, I C C (m A ) TEMPERATURE