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ADM202JRN Fiches technique(PDF) 1 Page - Analog Devices |
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ADM202JRN Fiches technique(HTML) 1 Page - Analog Devices |
1 / 6 page REV. A 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a ADM202/ADM203 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2001 FUNCTIONAL BLOCK DIAGRAMS ADM202 0.1 F 6.3V 0.1 F 16V C1+ C1– C2– C2+ T1IN T1 T1OUT T2IN T2 T2OUT TTL/CMOS INPUTS* RS-232 OUTPUTS R1OUT R1 R1IN R2OUT R2IN TTL/CMOS OUTPUTS RS-232 INPUTS** R2 V– 0.1 F 16V +10V TO –10V VOLTAGE INVERTER 0.1 F 6.3V 0.1 F 6.3V 5V INPUT V+ VCC +5V TO +10V VOLTAGE DOUBLER GND T1IN T1 T1OUT T2IN T2 T2OUT TTL/CMOS INPUTS* RS-232 OUTPUTS R1OUT R1 R1IN R2OUT R2IN TTL/CMOS OUTPUTS RS-232 INPUTS** R2 5V INPUT VCC DO NOT MAKE CONNECTIONS TO THESE PINS C1+ C1– INTERNAL –10V POWER SUPPLY V– V– V+ INTERNAL +10V POWER SUPPLY C2+ C2+ C2– C2– GND GND ADM203 *INTERNAL 400k PULL-UP RESISTOR ON EACH TTL/CMOS INPUT. **INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT. *INTERNAL 400k PULL-UP RESISTOR ON EACH TTL/CMOS INPUT. **INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT. GENERAL DESCRIPTION The ADM202/ADM203 is a two-channel RS-232 line driver/ receiver pair designed to operate from a single 5 V power sup- ply. A highly efficient on-chip charge pump design permits RS-232 levels to be developed using charge pump capacitors as small as 0.1 µF. The capacitors are internal to the package on the ADM203 so no external capacitors are required. These converters generate ±10 V RS-232 output levels. The ADM202/ADM203 meets or exceeds the EIA-232-E and V.28 specifications. Fast driver slew rates permit operation up to 120 kB while high-drive currents allow for extended cable lengths. An epitaxial BiCMOS construction minimizes power consump- tion to 10 mW and also guards against latch-up. Overvoltage protection is provided allowing the receiver inputs to withstand continuous voltages in excess of ± 30 V. In addition, all pins contain ESD protection to levels greater than 2 kV. The ADM202 is available in 16-lead DIP and both narrow and wide SOIC packages. The ADM203 is available in a 20-lead DIP package. FEATURES 120 kB Transmission Rate ADM202: Small (0.1 F) Charge Pump Capacitors ADM203: No External Capacitors Required Single 5 V Power Supply Meets EIA-232-E and V.28 Specifications Two Drivers and Two Receivers On-Board DC-DC Converters 9 V Output Swing with 5 V Supply Low Power BiCMOS: 2.0 mA ICC 30 V Receiver Input Levels APPLICATIONS Computers Peripherals Modems Printers Instruments High-Speed, 5 V, 0.1 F CMOS RS-232 Driver/Receivers |
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