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ADM202EARNZ-REEL7 Arkusz danych(PDF) 1 Page - Analog Devices |
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ADM202EARNZ-REEL7 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 16 page EMI/EMC-Compliant, ±15 kV, ESD-Protected RS-232 Line Drivers/Receivers ADM202E/ADM1181A Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2005 Analog Devices, Inc. All rights reserved. FEATURES Complies with 89/336/EEC EMC directive ESD protection to IEC1000-4-2 (801.2) ±8 kV: contact discharge ±15 kV: air-gap discharge ±15 kV: human body model EFT fast transient/burst immunity (IEC1000-4-4) Low EMI emissions (EN55022) 230 kbits/s data rate guaranteed TSSOP package option Upgrade for MAX202E, 232E, LT1181A APPLICATIONS 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). Both the level of electromagnetic emissions and immunity are in compliance. EM immunity includes ESD protection in excess of ±15 kV on all I/O lines, fast transient/burst protection (1000-4-4), and radiated immunity (1000-4-3). EM emissions include radiated and conducted emissions as required by Information Technology Equipment EN55022, CISPR22. The ADM202E and ADM1181A conform to the EIA-232E and CCITT V.28 specifications and operate at data rates up to 230 kbps. Four external 0.1 µF charge-pump capacitors are used for the voltage doubler/inverter, permitting operation from a single 5 V supply. FUNCTIONAL BLOCK DIAGRAMS *INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT C1+ C1– C2+ C2– VCC 10V 10V V+ V– +5V TO +10V VOLTAGE DOUBLER 5V INPUT C3 6.3V +10V TO –10V VOLTAGE INVERTER C4 10V T1OUT T1IN C5 T2OUT T2IN ADM202E R1OUT R2OUT R1IN R2IN CMOS INPUTS CMOS OUTPUTS EIA/TIA-232 OUTPUTS EIA/TIA-232 INPUTS * GND T1 T2 R1 R2 0.1 µF 0.1 µF 0.1 µF 0.1 µF 0.1 µF Figure 1. *INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT C1+ C1– C2+ C2– VCC 0.1 µF 10V 10V V+ V– +5V TO +10V VOLTAGE DOUBLER 5V INPUT C3 10V +10V TO –10V VOLTAGE INVERTER C4 0.1 µF 10V T1OUT T1IN C5 0.1 µF 10V T2OUT T2IN ADM1181A R1OUT R2OUT R1IN R2IN CMOS INPUTS CMOS OUTPUTS EIA/TIA-232 OUTPUTS EIA/TIA-232 INPUTS * GND T1 T2 R1 R2 0.1 µF 0.1 µF Figure 2. The ADM202E provides a robust pin-compatible upgrade for existing ADM202, ADM232L, or MAX202E/MAX232E sockets. It is available in a 16-lead PDIP, a wide SOIC, a narrow SOIC, and a space-saving TSSOP package that is 44% smaller than the SOIC package. The ADM1181A provides a robust pin-compatible upgrade for the LTC1181A, and it is available in a 16-lead PDIP package and a wide 16-lead SOIC package. |
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