adm202e Analog Devices, Inc., adm202e Datasheet
adm202e
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adm202e Summary of contents
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... General-purpose RS-232 data link Portable instruments PDAs GENERAL DESCRIPTION The ADM202E and ADM1181A are robust, high speed, 2-channel RS-232/V.28 interface devices that operate from a single 5 V power supply. Both products are suitable for operation in harsh electrical environments and are compliant with the EU directive on EMC (89/336/EEC) ...
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... ADM202E/ADM1181A TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 ESD Caution.................................................................................. 4 Pin Configuration and Function Descriptions............................. 5 General Description ......................................................................... 6 Circuit Description....................................................................... 6 Charge-Pump DC-to-DC Voltage Converter....................... 6 Transmitter (Driver) Section .................................................. 6 Receiver Section ....................................................................... 6 High Baud Rate............................................................................. 6 ESD/EFT Transient Protection Scheme .................................... 7 REVISION HISTORY 2/05—Rev Rev. C. Updated Format..................................................................Universal Changed Hysteresis Level ...
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... V/µs ±15 kV ±15 kV ± ± V/m Rev Page ADM202E/ADM1181A Test Conditions/Comments No load kΩ to GND 3.2 mA OUT I = −1 mA OUT 0°C to 85°C A All transmitter outputs loaded with 3 kΩ to ...
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... ADM202E/ADM1181A ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 2. Parameter V– Input Voltages Output Voltages T OUT R OUT Short-Circuit Duration T OUT Power Dissipation N-16 (Derate 6 mW/°C Above 50°C) θ , Thermal Impedance JA Power Dissipation R-16 (Derate 6 mW/°C Above 50°C) θ ...
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... IN CMOS INPUTS OUT CMOS OUTPUTS OUT ADM202E GND 15 * INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT Figure 4. ADM202E Typical Operating Circuit C1 GND C1– ADM202E OUT ADM1181A C2 C2– TOP VIEW ...
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... Capacitor C1 as the charge storage element. The 10 V level is then inverted to generate −10 V, using C2 as the storage element. Capacitor C3 and Capacitor C4 are used to reduce the output ripple. Their values are not critical and can be increased if desired. On the ADM202E, Capacitor C3 is shown connected between V+ and V , whereas it is connected between V+ and CC GND on the ADM1181A ...
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... ESD/EFT TRANSIENT PROTECTION SCHEME The ADM202E/ADM1181A use protective clamping structures on all inputs and outputs to clamp the voltage to a safe level and dissipate the energy present in electrostatic (ESD) and electrical fast transients (EFT) discharges. A simplified schematic of the protection structure is shown in Figure 8 and Figure 9. Each input and output contains two back-to-back high speed clamping diodes ...
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... ADM202E/ADM1181A TYPICAL PERFORMANCE CHARACTERISTICS START 30.0MHz STOP 200.0MHz Figure 10. EMC Radiated Emissions 0.3 0 LOG FREQUENCY (MHz) Figure 11. EMC Conducted Emissions –1 –3 –5 –7 –9 0 1000 1500 500 LOAD CAPACITANCE (pF) Figure 12 ...
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... Ch2 Ch1 5.00V 5.00V M 2.00µs Ch1 Figure 16. 230 kbps Data Transmission 300 250 200 150 100 50 0 4.0 –400mV Figure 17. Charge-Pump Impedance vs. V Rev Page ADM202E/ADM1181A V– V+ 4.5 5.0 5.5 6 ...
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... TO 1ns 30ns Figure 20. IEC1000-4-2 ESD Current Waveform The ADM202E/ADM1181E products are tested using both of the previously mentioned test methods. Pins are tested with respect to all other pins as per the MIL-STD-883B specification. In addition, I/O pins are tested as per the IEC test specification. ...
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... Classification 4: Degradation or loss of function that is not recoverable due to damage t 15ms The ADM202E/ADM1181A meet Classification 2 and have been tested under worst-case conditions using unshielded cables. Data transmission during the transient condition is corrupted, but can resume immediately following the EFT event without user intervention. ...
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... Conducted emissions are measured by monitoring the mains line. The equipment used consists of a spectrum analyzer and a LISN (line impedance stabilizing network) that essentially presents a fixed impedance at RF. The spectrum analyzer scans for emissions MHz; a plot for the ADM202E is shown in Figure 25 ...
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... The RS-232 outputs on the ADM202E feature a controlled slew rate to minimize the level of radiated emissions, yet they are fast enough to support data rates 230 kBaud. ...
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... ADM202E/ADM1181A OUTLINE DIMENSIONS 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) 0.30 (0.0118) 0.10 (0.0039) 0.51 (0.0201) SEATING COPLANARITY 0.33 (0.0130) PLANE 0.10 0.31 (0.0122) 0.20 (0.0079) COMPLIANT TO JEDEC STANDARDS MS-013AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN Figure 28 ...
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... ADM202EARNZ −40°C to +85°C 1 ADM202EARNZ-REEL −40°C to +85°C 1 ADM202EARNZ-REEL7 −40°C to +85°C ADM202EARU −40°C to +85°C ADM202EARU-REEL −40°C to +85°C ADM202EARU-REEL7 −40°C to +85°C 1 ADM202EARUZ −40°C to +85°C 1 ADM202EARUZ-REEL −40°C to +85°C 1 ADM202EARUZ-REEL7 − ...
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... ADM202E/ADM1181A NOTES © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C00066-0-2/05(C) Rev Page ...