ADM2484EBRWZ Analog Devices Inc, ADM2484EBRWZ Datasheet
ADM2484EBRWZ
Specifications of ADM2484EBRWZ
Available stocks
Related parts for ADM2484EBRWZ
ADM2484EBRWZ Summary of contents
Page 1
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 3.3 V operation (V DD1 ...
Page 2
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 ...
Page 3
SPECIFICATIONS All voltages are relative to their respective grounds, 3.0 V ≤ V apply over the entire recommended operation range, all typical specifications are at T otherwise noted. Table 1. Parameter SUPPLY CURRENT Power Supply Current, Logic Side TxD/RxD Data ...
Page 4
ADM2484E TIMING SPECIFICATIONS T = −40°C to +85°C. A Table 2. Parameter DRIVER Propagation Delay Differential Driver Output Skew (t − DPLH DPHL Rise Time/Fall Time Enable Time Disable Time RECEIVER Propagation Delay Pulse Width Distortion, PWD = ...
Page 5
INSULATION AND SAFETY-RELATED SPECIFICATIONS Table 5. Parameter Rated Dielectric Insulation Voltage Minimum External Air Gap (Clearance) Minimum External Tracking (Creepage) Minimum Internal Gap (Internal Clearance) Tracking Resistance (Comparative Tracking Index) Isolation Group VDE 0884 INSULATION CHARACTERISTICS This isolator is suitable ...
Page 6
ADM2484E ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. Each voltage is relative to its A respective ground. Table 7. Parameter V DD1 V DD2 Logic Input Voltages Bus Terminal Voltages Logic Output Voltages Average Output Current per Pin ...
Page 7
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 8. Pin Function Descriptions Pin No. Mnemonic Description 1 V Power Supply (Logic Side). Decoupling capacitor to GND DD1 2 GND Ground (Logic Side RxD Receiver Output. 4 Receiver Enable Input. Active ...
Page 8
ADM2484E TYPICAL PERFORMANCE CHARACTERISTICS 1.4 1.2 NO LOAD 1.0 54Ω LOAD 100Ω LOAD 0.8 0.6 0.4 0.2 0 –40 – TEMPERATURE (°C) Figure 3. I Supply Current vs. Temperature (See Figure 20) DD1 45 54Ω LOAD 40 35 ...
Page 9
SIDE 2 200 150 SIDE 1 100 100 CASE TEMPERATURE (°C) Figure 9. Thermal Derating Curve, Dependence of Safety-Limiting Values with Case Temperature per VDE 0884 0 –2 –4 –6 –8 –10 –12 ...
Page 10
ADM2484E TEST CIRCUITS V OD Figure 14. Driver Voltage Measurement 375Ω V 60Ω OD 375Ω Figure 15. Driver Voltage Measurement Figure 16. Driver Propagation Delay TEST C ...
Page 11
SWITCHING CHARACTERISTICS V DD1 DD1 DD1 0V t DPLH Z 1/ 90% POINT – V DIFF (Y) V DIFF 10% POINT – Figure 21. Driver ...
Page 12
ADM2484E CIRCUIT DESCRIPTION ELECTRICAL ISOLATION In the ADM2484E, 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 25). The driver input ...
Page 13
THERMAL SHUTDOWN The ADM2484E contains thermal shutdown circuitry that protects the part from excessive power dissipation during fault conditions. Shorting the driver outputs to a low impedance source can result in high driver currents. The thermal sensing circuitry detects the ...
Page 14
ADM2484E APPLICATIONS INFORMATION ISOLATED POWER SUPPLY CIRCUIT The ADM2484E requires isolated power capable of 3 approximately 75 mA (this current is dependent on the data rate and termination resistors used supplied between the V ...
Page 15
TYPICAL APPLICATIONS Figure 30 and Figure 31 show typical applications of the ADM2484E in half-duplex and full-duplex RS-485 network configurations 256 transceivers can be connected to the RS-485 bus. To minimize reflections, the line must be terminated ADM2484E ...
Page 16
... COPLANARITY 0.10 ORDERING GUIDE Model 1 Temperature Range ADM2484EBRWZ −40°C to +85°C ADM2484EBRWZ-REEL7 −40°C to +85°C EVAL-ADM2484EEBZ RoHS Compliant Part. ©2008–2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06984-0-11/10(C) 10.50 (0.4134) 10 ...