ADM2490EBRWZ Analog Devices Inc, ADM2490EBRWZ Datasheet
ADM2490EBRWZ
Specifications of ADM2490EBRWZ
Available stocks
Related parts for ADM2490EBRWZ
ADM2490EBRWZ Summary of contents
Page 1
FEATURES Isolated, full-duplex RS-485/RS-422 transceiver ±8 kV ESD protection on RS-485 input/output pins 16 Mbps data rate Complies with ANSI TIA/EIA-485-A-1998 and ISO 8482: 1987(E) Suitable for operation (V ) DD1 High common-mode transient immunity: ...
Page 2
ADM2490E 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 ............................................................... 5 Insulation and ...
Page 3
SPECIFICATIONS All voltages are relative to their respective ground; 2.7 ≤ V over the entire recommended operation range, unless otherwise noted. All typical specifications are at T unless otherwise noted. Table 1. Parameter SUPPLY CURRENT Power Supply Current, Logic Side ...
Page 4
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 ...
Page 5
REGULATORY INFORMATION Table 5. ADM2490E Approvals Organization Approval Type UL Recognized under the Component Recognition Program of Underwriters Laboratories, Inc. VDE Certified according to DIN EN 60747-5-2 (VDE 0884-10 Part 2): 2003-01, DIN EN 60950 (VDE 0805): 2001-12; EN 60950: ...
Page 6
ADM2490E ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. Each voltage is relative to its A respective ground. Table 8. Parameter Storage Temperature Range Ambient Operating Temperature Range V DD1 V DD2 Logic Input Voltages Bus Terminal Voltages Logic ...
Page 7
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 9. Pin Function Descriptions Pin No. Mnemonic Description 1 V Power Supply (Logic Side). Decoupling capacitor to GND DD1 0.01 μF and 0.1 μ GND Ground (Logic Side RxD ...
Page 8
ADM2490E TEST CIRCUITS V OD Figure 3. Driver Voltage Measurement 375Ω V 60Ω OD3 375Ω Figure 4. Driver Voltage Measurement V V DD1 DD2 TxD RxD GND GND 1 Figure 5. Supply-Current Measurement Test Circuit (See Figure 10 and Figure ...
Page 9
SWITCHING CHARACTERISTICS 10% POINT RxD 1.5V 1.5V t PLH 1/2VO – | PWD PLH PHL 90% POINT t R Figure 8. Driver ...
Page 10
ADM2490E TYPICAL PERFORMANCE CHARACTERISTICS 3.00 2.95 2.90 NO LOAD 100Ω LOAD 220Ω-100Ω-220Ω LOAD 2.85 2.80 2.75 2.70 –40 – TEMPERATURE (°C) Figure 10. I Supply Current vs. Temperature (See Figure 5) DD1 70 60 220Ω-100Ω-220Ω LOAD 50 ...
Page 11
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 0884-10 0 –2 –4 –6 –8 –10 –12 ...
Page 12
ADM2490E 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 ...
Page 13
THERMAL SHUTDOWN The ADM2490E 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 increase ...
Page 14
ADM2490E APPLICATIONS INFORMATION ISOLATED POWER SUPPLY CIRCUIT The ADM2490E requires isolated power capable approximately 65 mA (this current is dependent on the data rate and termination resistors used supplied between the V ...
Page 15
TYPICAL APPLICATIONS The ADM2490E transceiver is designed for point-to-point transmission lines. Figure 26 shows a full-duplex point-to-point application. To minimize reflections, terminate the line at the receiver end with a termination resistor. The value of the termination resistor should be ...
Page 16
... ORDERING GUIDE Model Temperature Range 1 ADM2490EBRWZ −40°C to +105°C 1 ADM2490EBRWZ-REEL7 −40°C to +105° RoHS Compliant Part. ©2006–2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 10.50 (0.4134) 10.10 (0.3976) ...