adm488a Analog Devices, Inc., adm488a Datasheet
adm488a
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adm488a Summary of contents
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... Data concentration Data multiplexers Integrated services digital network (ISDN) GENERAL DESCRIPTION The ADM488A and ADM489A are low power, differential line transceivers suitable for communication on multipoint bus transmission lines. They are intended for balanced data transmission and comply with both RS-485 and RS-422 standards of the Electronics Industries Association (EIA) ...
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... ADM488A/ADM489A TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagrams ............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Timing Specifications .................................................................. 4 Absolute Maximum Ratings ............................................................ 5 ESD Caution .................................................................................. 5 Pin Configurations and Function Descriptions ........................... 6 REVISION HISTORY 10/09—Revision 0: Initial Version Typical Performance Characteristics ..............................................8 Test Circuits ........................................................................................9 Switching Characteristics .......................................................... 10 Theory of Operation ....................................................................... 11 ...
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... ±1 Rev Page ADM488A/ADM489A Unit Test Conditions/Comments ∞, see Figure Ω (RS-422), see Figure Ω (RS-485), see Figure – +12 V, see Figure 12, V TST Ω Ω, see Figure Ω ...
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... ADM488A/ADM489A TIMING SPECIFICATIONS ± 10%. All specifications T CC MIN Table 2. Parameter DRIVER Propagation Delay Input to Output Driver Output Skew Driver Rise/Fall Time Driver Enable to Output Valid Driver Disable Timing Maximum Data Rate RECEIVER Propagation Delay Input to Output Skew Receiver Enable Receiver Disable ...
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... 0.3 V device reliability. CC −0 0 ESD CAUTION − +14 V − +12.5 V −0 0 520 mW 110°C/W 800 mW 120°C/W −40°C to +85°C −65°C to +150°C 300°C 215°C 220°C Rev Page ADM488A/ADM489A ...
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... ADM488A/ADM489A PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS Table 4. ADM488A Pin Function Descriptions Pin No. Mnemonic Description 1 V Power Supply ± 10 Receiver Output. When A > 200 mV high < 200 mV low Driver Input. A logic low on DI forces Y low and Z high, whereas a logic high on DI forces Y high and Z low. ...
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... Driver Input. When the driver is enabled, a logic low on DI forces Y low and Z high, whereas a logic high on DI forces Y high and Z low. Ground Connection Noninverting Driver, Differential Output Y. Inverting Driver, Differential Output Z. Inverting Receiver, Input B. Noninverting Receiver, Input A. Power Supply ± 10%. Rev Page ADM488A/ADM489A ...
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... ADM488A/ADM489A TYPICAL PERFORMANCE CHARACTERISTICS 0.2 0.4 0.6 0.8 1.0 OUTPUT VOLTAGE (V) Figure 6. Output Current vs. Receiver Output Low Voltage 0 –2 –4 –6 –8 –10 –12 –14 –16 –18 –20 3.0 3.2 3.4 3.6 3.8 4.0 4.2 OUTPUT VOLTAGE (V) Figure 7. Output Current vs. Receiver Output High Voltage ...
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... Figure 12. Driver Enable/Disable Test Circuit Figure 13. Driver Voltage Measurement Test Circuit TST OUT Rev Page ADM488A/ADM489A +1. –1. OUT RE IN Figure 14. Receiver Enable/Disable Test Circuit DIFF ...
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... ADM488A/ADM489A SWITCHING CHARACTERISTICS PLH Z 1/ 90% POINT – V DIFF (Y) V DIFF 10% POINT – Figure 16. Driver Propagation Delay, Rise/Fall Timing A – PLH – SKEW PLH PHL RO 1.5V Figure 17. Receiver Propagation Delay /2 t PHL ...
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... The input impedance on the ADM488A/ADM489A is 12 kΩ, allowing transceivers on the differential bus. The ADM488A/ADM489A operate from a single 5 V ± 10% power supply. A thermal shutdown circuit prevents excessive power dissipation caused by bus contention or by output shorting. ...
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... ADM488A NOTES EQUAL TO THE CHARACTERISTIC IMPEDANCE OF THE CABLE. T MAXIMUM NUMBER OF NODES = Figure 21. Typical RS-485 Full-Duplex Application Rev Page SLAVE ADM488A Z Y SLAVE ADM488A ...
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... The ADM488A/ADM489A are designed for bidirectional data communications on multipoint transmission lines. A typical application with a multipoint transmission network is illustrated in Figure 22. An RS-485 transmission line can have transceivers on the bus ...
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... ADM488A/ADM489A OUTLINE DIMENSIONS IDENTIFIER COPLANARITY 3.10 3.00 2.90 5. 3.10 4.90 3.00 4.65 1 2.90 5 PIN 1 0.50 BSC 0.95 15° MAX 0.85 1.10 MAX 0.75 0.15 0.23 6° 0.30 0.05 0.13 0° 0.15 COPLANARITY 0.10 COMPLIANT TO JEDEC STANDARDS MO-187-BA Figure 23. 10-Lead Mini Small Outline Package [MSOP] (RM-10) Dimensions shown in millimeters 5.00 (0.1968) 4.80 (0.1890 6.20 (0.2441) 4.00 (0.1574) 1 5.80 (0.2284) 3.80 (0.1497) 4 1.27 (0.0500) BSC 1.75 (0.0688) 1.35 (0.0532) 0.25 (0.0098) 8° ...
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... Mini Small Outline Package [MSOP] 10-Lead Mini Small Outline Package [MSOP] 14-Lead Standard Small Outline Package, Narrow Body [SOIC_N] 14-Lead Standard Small Outline Package, Narrow Body [SOIC_N] Rev Page ADM488A/ADM489A 0.50 (0.0197) 45° 0.25 (0.0098) 1.27 (0.0500) 0.40 (0.0157) Package Option Branding ...
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... ADM488A/ADM489A NOTES ©2009 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D08498-0-10/09(0) Rev Page ...