adm2490e Analog Devices, Inc., adm2490e Datasheet
adm2490e
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adm2490e Summary of contents
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... FUNCTIONAL BLOCK DIAGRAM TxD RxD GENERAL DESCRIPTION The ADM2490E is an isolated data transceiver with ±8 kV ESD protection and is suitable for high speed, full-duplex communication on multipoint transmission lines designed for balanced transmission lines and complies with ANSI TIA/EIA RS-485-A-1998 and ISO 8482: 1987(E). The device employs Analog Devices, Inc ...
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... TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications .................................................................. 4 ADM2490E Characteristics............................................................. 5 Package Characteristics ............................................................... 5 Regulatory Information (Pending) ............................................ 5 Insulation and Safety-Related Specifications............................ 5 VDE 0884 Insulation Characteristics (Pending)...................... 6 Absolute Maximum Ratings............................................................ 7 ESD Caution.................................................................................. 7 Pin Configuration and Functional Descriptions.......................... 8 REVISION HISTORY 10/06— ...
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... 1 − kΩ 0 1.5 mA, V ORxD −1.5 mA, V ORxD 100 mA kV/μ kV, transient CM magnitude = 800 V is the common-mode potential CM ADM2490E = V = 5.0 V, DD2 ≤ 5.5 V, unloaded ≤ 5.5 V, unloaded ≤ +12 V, − −0 − 0 ...
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... ADM2490E TIMING SPECIFICATIONS T = −40°C to +85°C A Table 2. Parameter DRIVER Maximum Data Rate Propagation Delay Pulse Width Distortion, PWD = |t − PWD = |t − t PYLH PYHL PZLH Single-Ended Output Rise/Fall Times RECEIVER Propagation Delay Pulse Width Distortion, PWD = |t − t PLH T = −40°C to +105°C A Table 3 ...
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... V rms isolation voltage 1 In accordance with UL1577, each ADM2490E is proof tested by applying an insulation test voltage ≥ 6000 V rms for 1 second (current leakage detection limit = 10 μA accordance with DIN EN 60747-5-2, each ADM2490E is proof tested by applying an insulation test voltage ≥ 1590 V peak for 1 second (partial discharge detection limit = 5 pC) ...
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... ADM2490E 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. An asterisk (*) on a package denotes VDE 0884 approval for 848 V peak working voltage. Table 7. ...
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... Absolute maximum ratings apply individually only, not in −0 combination. −0 0.5 V DD1 ESD CAUTION − +14 V −0 0.5 V DD1 ±35 mA ±8 kV 73°C/W Rev Page ADM2490E ...
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... RxD ADM2490E TOP VIEW (Not to Scale) GND TxD GND GND CONNECT Figure 2. ADM2490E Pin Configuration required; capacitor value should be between 1 required; capacitor value should be between 2 Rev Page ...
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... Figure 5. Supply-Current Measurement Test Circuit, See Figure 10 and Figure TEST V DD2 220Ω Y 100Ω Z 220Ω GND 2 Rev Page ADM2490E LDIFF Figure 6. Driver Propagation Delay A V OUT Figure 7. Receiver Propagation Delay ...
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... ADM2490E SWITCHING CHARACTERISTICS 3V 1. PLH Z 1/2VO – | PWD PLH PHL V OH 90% POINT A, B 10% POINT Figure 8. Driver Propagation Delay, Rise/Fall Timing 1.5V t PHL A, B 90% POINT RO 10% POINT t F Rev Page PLH PHL 1.5V 1.5V Figure 9. Receiver Propagation Delay ...
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... TEMPERATURE (°C) Figure 12. Driver Propagation Delay vs. Temperature 60 80 100 100 TPZHL TPYLH TPZLH TPYHL 100 Rev Page ADM2490E PLH t PHL –40 – TEMPERATURE (°C) Figure 13. Receiver Propagation Delay vs. Temperature TxD Y AND Z OUTPUTS ...
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... ADM2490E 350 300 250 SIDE 2 200 150 SIDE 1 100 100 CASE TEMPERATURE (°C) Figure 16. Thermal Derating Curve, Dependence of Safety-Limiting Values with Case Temperature per VDE 0884 0 –2 –4 –6 –8 –10 –12 –14 4.0 4.2 4.4 VOLTAGE (V) Figure 17. Output Current vs. Receiver Output High Voltage ...
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... CIRCUIT DESCRIPTION ELECTRICAL ISOLATION In the ADM2490E, electrical isolation is implemented on the logic side of the interface. Therefore, the part has two main sections: a digital isolation section and a transceiver section (see Figure 21). The driver input signal, which is applied to the TxD pin and referenced to logic ground (GND ...
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... V to 0.75 V—still well above the 0.5 V sensing threshold of the decoder. Figure 23 shows the magnetic flux density values in terms of more familiar quantities, such as maximum allowable current flow, at given distances away from the ADM2490E transformers. 1000 100 DISTANCE = 5mm 10 ...
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... APPLICATIONS INFORMATION ISOLATED POWER-SUPPLY CIRCUIT The ADM2490E requires isolated power capable approximately 75 mA (this current is dependant on the data rate and termination resistors used supplied between the V and the GND pins. A transformer-driver circuit with a DD2 2 center-tapped transformer and LDO can be used to generate the isolated 5 V supply, as shown in Figure 25 ...
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... PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN. ORDERING GUIDE Model ADM2490EBRWZ 1 1 ADM2490EBRWZ–REEL7 Pb-free part. ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05889-0-10/06(0) 10.50 (0.4134) 10 ...