adm2486 Analog Devices, Inc., adm2486 Datasheet
adm2486
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adm2486 Summary of contents
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... RE GND 1 Figure 1. The ADM2486 driver has an active-high enable feature. The driver differential outputs and the receiver differential inputs are connected internally to form a differential input/output port that imposes minimal loading on the bus when the driver is disabled or when VDD1 or VDD2 = 0 V. Also provided is an active-high receiver disable feature that causes the receive output to enter a high impedance state ...
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... ADM2486 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications....................................................................... 5 ADM2486 Characteristics ............................................................... 6 Package Characteristics ............................................................... 6 Regulatory Information............................................................... 6 Insulation and Safety-Related Specifications............................ 6 VDE 0884 Insulation Characteristics ........................................ 7 Absolute Maximum Ratings............................................................ 8 ESD Caution.................................................................................. 8 Pin Configuration and Function Descriptions............................. 9 Test Circuits..................................................................................... 10 REVISION HISTORY 2/06— ...
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... DD1 0.1 0.2 0 ±1 1.3 1.0 4.0 0.8 1.1 2.1 3.0 43.0 58.0 Rev Page ADM2486 Unit Test Conditions/Comments ∞, see Figure Ω (RS-422), see Figure Ω (RS-485), see Figure − + ≥ 4.7, TST DD1 see Figure Ω Ω, see Figure Ω ...
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... ADM2486 Parameter COMMON-MODE TRANSIENT IMMUNITY HIGH FREQUENCY, COMMON-MODE NOISE IMMUNITY 1 Common-mode transient immunity is the maximum common-mode voltage slew rate that can be sustained while maintaining specification-compliant operation 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 CM common-mode voltage slew rates apply to both rising and falling common-mode voltage edges ...
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... kΩ μ μs Rev Page ADM2486 = C = 100 pF, see Figure 100 pF, see Figure 7 and Figure 100 pF, see Figure 7 and Figure 100 pF, see Figure 7 and Figure 12 L1 ...
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... Device considered a 2-terminal device: Pin 1 through Pin 8 shorted together, and Pin 9 through Pin 16 shorted together. 2 Input capacitance is from any input data pin to ground REGULATORY INFORMATION The ADM2486 has been approved by the following organizations: Table 4. Organization Approval Type UL Recognized under 1577 component recognition program. File E214100. ...
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... Highest Allowable Overvoltage (Transient Overvoltage, t Safety-Limiting Values (Maximum Value Allowed in the Event of a Failure, see Figure 21). Case Temperature Input Current Output Current Insulation Resistance 500 sec, Partial Discharge < sec) tr Rev Page ADM2486 Symbol Characteristic Unit I-IV I-II I-II 40/85/ 560 V IORM PEAK V ...
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... ADM2486 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. All voltages are relative to A their respective ground. Table 7. Parameter V DD1 V DD2 Digital Input Voltage (RTS, RE, TxD) Digital Output Voltage RxD DE Driver Output/Receiver Input Voltage Operating Temperature Range Storage Temperature Range Average Output Current per Pin θ ...
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... Request to Send Input. Driving this input high enables the driver, and driving it low disables the driver. 6 TxD Transmit Data Input. Data to be transmitted by the driver is applied to this input Power_Valid. Used during power-up and power-down, needs to be tied high when the ADM2486 is operational, see the Applications Information section GND Ground (Bus Side). 2 ...
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... ADM2486 TEST CIRCUITS V OD Figure 3. Driver Voltage Measurement 375Ω V 60Ω OD3 375Ω Figure 4. Driver Voltage Measurement RTS TxD RxD RE V GND V DD1 1 DD2 Figure 5. Supply-Current Measurement Test Circuit RTS TxD B V CM(HF) RxD A 2.2kΩ RECEIVE GND 2 ENABLE V GND V GND ...
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... Rev Page 0.5V 0.5V DD1 2. 2.3V Figure 14. Driver Enable/Disable Timing 0.5V DD1 1.5V RxD O/P LOW O/P HIGH RxD 1.5V 0V Figure 15. Receiver Enable/Disable Timing ADM2486 0.7V DD1 DD1 0.3V DD1 – 0. 0.7V DD1 0.5V DD1 0.3V DD1 – 0.5V OH ...
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... ADM2486 TYPICAL PERFORMANCE CHARACTERISTICS 1.4 1.2 I _RCVR_ENABLE @ 5.5V DD1 1.0 I _DE_ENABLE @ 5.5V DD2 0.8 0.6 0.4 0 –40 TEMPERATURE (°C) Figure 16. Unloaded Supply Current vs. Temperature 50 t RECEIVER PLH 45 t RECEIVER PHL –40 TEMPERATURE (°C) Figure 17. Driver Propagation Delay vs. Temperature 50 t DRIVER BHL 45 t DRIVER ...
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... Figure 23. Output Current vs. Receiver Output Low Voltage 4.78 4.76 4.74 4.72 4.70 4.68 4.66 5.00 5.25 –40 –25 Figure 24. Receiver Output High Voltage vs. Temperature 0.32 0.30 0.28 0.26 0.24 0.22 0.20 2.25 2.50 –40 –25 Figure 25. Receiver Output Low Voltage vs. Temperature Rev Page ADM2486 65 80 – TEMPERATURE (° −4 mA RxD – TEMPERATURE (° –4 mA RxD ...
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... The power-up/power-down characteristics of the ADM2486 are DE in accordance with the supply thresholds shown in Table 11. Upon power-up, the ADM2486 output signals (A, B, RxD, and R DE) reach their correct state once both supplies have exceeded their thresholds. Upon power-down, the ADM2486 output ...
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... Therefore, iCouplers have essentially infinite dc field immunity. The following analysis defines the conditions under which this can occur. The ADM2486’ operating condition is examined because it represents the most susceptible mode of operation. The limitation on the iCoupler’s ac magnetic field immunity is ...
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... ADM2486 APPLICATIONS INFORMATION PC BOARD LAYOUT The ADM2486 isolated RS-485 transceiver requires no external interface circuitry for the logic interfaces. Power supply bypassing is strongly recommended at the input and output supply pins (see Figure 29). Bypass capacitors are most conveniently connected between Pin 1 and Pin 2 for V ...
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... ISOLATED POWER SUPPLY CIRCUIT The ADM2486 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. DD2 2 A transformer driver circuit with a center-tapped transformer and LDO can be used to generate the isolated 5 V supply, as shown in Figure 32 ...
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... ADM2486 OUTLINE DIMENSIONS 0.30 (0.0118) 0.10 (0.0039) COPLANARITY ORDERING GUIDE Model Data Rate (Mbps) ADM2486BRW 20 ADM2486BRW-REEL 20 1 ADM2486BRWZ 20 1 ADM2486BRWZ-REEL Pb-free part. 10.50 (0.4134) 10.10 (0.3976 7.60 (0.2992) 7.40 (0.2913) 10.65 (0.4193 10.00 (0.3937) 1.27 (0.0500) 2.65 (0.1043) BSC 2.35 (0.0925) 0.51 (0.0201) SEATING 0.33 (0.0130) PLANE 0.10 0.31 (0.0122) 0.20 (0.0079) COMPLIANT TO JEDEC STANDARDS MS-013-AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS ...
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... NOTES Rev Page ADM2486 ...
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... ADM2486 NOTES ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04604-0-2/06(D) T Rev Page ...