ADM485EARZ Analog Devices Inc, ADM485EARZ Datasheet
ADM485EARZ
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ADM485EARZ Summary of contents
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FEATURES TIA/EIA RS-485/RS-422 compliant ESD protection on RS-485 I/O pins ±15 kV human body model (HBM) Data rates ADM487E: 250 kbps ADM485E/ADM1487E: 2.5 Mbps Half-duplex Reduced slew rates for low EMI Common-mode input range: − +12 V Thermal ...
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ADM485E/ADM487E/ADM1487E TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Specifications .................................................................. 4 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. ...
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SPECIFICATIONS ± 10 unless otherwise noted MIN MAX Table 2. ADM485E/ADM487E/ADM1487E Parameter DRIVER Differential Outputs Differential Output Voltage (No Load) Differential Output Voltage (with Load) Δ ...
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ADM485E/ADM487E/ADM1487E TIMING SPECIFICATIONS ± 10 unless otherwise noted MIN MAX Table 3. ADM485E/ADM1487E Parameter DRIVER Driver Propagation Delay Input to Output, Low to High Driver Propagation Delay Input ...
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± 10 unless otherwise noted MIN MAX Table 4. ADM487E Parameter DRIVER Driver Propagation Delay Input to Output, Low to High Driver Propagation Delay Input to Output, High ...
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ADM485E/ADM487E/ADM1487E ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 5. Parameter V to GND CC Digital I/O Voltage (DE, RE) Driver Input Voltage (DI) Receiver Output Voltage (RO) Driver Output/Receiver Input Voltage (A, B) Operating Temperature Range ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 6. Pin Function Descriptions Pin No. Mnemonic Description 1 RO Receiver Output. When enabled > 200 mV, then RO = high < 200 mV, then RO ...
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ADM485E/ADM487E/ADM1487E TYPICAL PERFORMANCE CHARACTERISTICS 0.5 1.0 1.5 OUTPUT LOW VOLTAGE (V) Figure 3. Output Current vs. Receiver Output Low Voltage –30 –25 –20 –15 –10 –5 0 1.5 ...
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OUTPUT LOW VOLTAGE (V) Figure 9. Output Current vs. Driver Output Low Voltage –140 –120 –100 –80 –60 –40 –20 0 –8 –6 –4 –2 0 OUTPUT ...
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ADM485E/ADM487E/ADM1487E CH1 5.00V CH2 500mV M200ns CH3 500mV T 60.80% Figure 15. ADM487E Receiver t Driven by External RS-485 Device RPLH CH1 5.00V CH2 ...
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TEST CIRCUITS AND SWITCHING CHARACTERISTICS Figure 18. Driver DC Test Load Figure 19. Driver Timing Test Circuit DPLH ...
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ADM485E/ADM487E/ADM1487E RZH, RZH(SHDN CLOSED S3 = +1.5V RE +1.5V +0.5V RO +1.5V S3 1kΩ –1. 15pF GENERATOR 50Ω S1 OPEN S2 CLOSED S3 = +1.5V + ...
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THEORY OF OPERATION The ADM485E/ADM487E/ADM1487E are ruggedized RS-485 transceivers that operate from a single 5 V supply. They contain protection against high levels of electrostatic discharge and are ideally suited for operation in electrically harsh environments or where cables can ...
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ADM485E/ADM487E/ADM1487E ESD Testing Two coupling methods are used for ESD testing: contact discharge and air-gap discharge. Contact discharge calls for a direct connection to the unit being tested; air-gap discharge uses a higher test voltage but does not make direct ...
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APPLICATIONS INFORMATION DIFFERENTIAL DATA TRANSMISSION Differential data transmission is used to reliably transmit data at high rates over long distances and through noisy environ- ments. Differential transmission nullifies the effects of ground shifts and noise signals that appear as common-mode ...
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... COPLANARITY ORDERING GUIDE 1, 2 Model Temperature Range ADM485EARZ –40°C to +85°C ADM485EARZ-REEL7 –40°C to +85°C ADM487EARZ –40°C to +85°C ADM487EARZ-REEL7 –40°C to +85°C ADM487EWARZ –40°C to +85°C ADM487EWARZ-REEL7 –40°C to +85°C ADM1487EARZ – ...