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ADM3202ARNZ Folha de dados(PDF) 1 Page - Analog Devices |
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ADM3202ARNZ Folha de dados(HTML) 1 Page - Analog Devices |
1 / 16 page Low Power, 3.3 V, RS-232 Line Drivers/Receivers ADM3202/ADM3222/ADM1385 Rev. E Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©1998–2011 Analog Devices, Inc. All rights reserved. FEATURES 460 kbps data rate Specified at 3.3 V Meets EIA-232E specifications 0.1 μF charge pump capacitors Low power shutdown (ADM3222 and ADM1385) PDIP, SOIC_N, SOIC_W, SSOP, and TSSOP options Upgrade for MAX3222/MAX3232 and LTC1385 ESD protection to IEC 1000-4-2 (801.2) on RS-232 pins (ADM3202 only) ±8 kV: contact discharge ±15 kV: air gap discharge APPLICATIONS General-purpose RS-232 data link Portable instruments Printers, palmtop computers, PDAs GENERAL DESCRIPTION The ADM3202/ADM3222/ADM1385 transceivers are high speed, 2-channel RS-232/V.28 interface devices that operate from a single 3.3 V power supply. Low power consumption and a shutdown facility (ADM3222/ADM1385) make them ideal for battery-powered portable instruments. The ADM3202/ADM3222/ADM1385 parts conform to the EIA-232E and CCITT V.28 specifications and operate at data rates up to 460 kbps. Four external 0.1 μF charge pump capacitors are used for the voltage doubler/inverter, permitting operation from a single 3.3 V supply. The ADM3222 contains additional enable and shutdown circuitry. The EN input can be used to three-state the receiver outputs. The SD input is used to power down the charge pump and transmitter outputs, reducing the quiescent current to less than 0.5 μA. The receivers remain enabled during shutdown unless disabled using EN. The ADM1385 contains a driver disable mode and a complete shutdown mode. The ADM3202 is available in a 16-lead PDIP, SOIC_W, and SOIC_N, as well as a space-saving 16-lead TSSOP. The ADM3222 is available in 18-lead PDIP and SOIC_W and in 20-lead SSOP and TSSOP. The ADM1385 is available in a 20-lead SSOP, which is pin-compatible with the LTC1385 CG. FUNCTIONAL BLOCK DIAGRAMS C1+ C2+ C1– C2– VCC V– V+ T1IN T1OUT T2IN T2OUT R1OUT R1IN R2OUT R2IN CMOS INPUTS EIA/TIA-232 OUTPUTS CMOS OUTPUTS EIA/TIA-232 INPUTS* T1 T2 R1 R2 + + 0.1µF 10V 0.1µF 10V GND ADM3202 C3 0.1µF 6.3V +3.3V INPUT +3.3V TO +6.6V VOLTAGE DOUBLER +6.6V TO –6.6V VOLTAGE INVERTER C5 0.1µF C4 0.1µF 10V *INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT Figure 1. C1+ C2+ C1– C2– VCC V– V+ T1IN T1OUT T2IN T2OUT R1OUT R1IN R2OUT EN R2IN SD CMOS INPUTS EIA/TIA-232 OUTPUTS CMOS OUTPUTS EIA/TIA-232 INPUTS* T1 T2 R1 R2 + + 0.1µF 10V 0.1µF 10V GND ADM3222 C3 0.1µF 6.3V +3.3V INPUT +3.3V TO +6.6V VOLTAGE DOUBLER +6.6V TO –6.6V VOLTAGE INVERTER C5 0.1µF C4 0.1µF 10V *INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT Figure 2. C1+ C2+ C1– C2– VCC V– V+ T1IN T1OUT T2IN T2OUT R1OUT R1IN R2OUT DD R2IN SD CMOS INPUTS EIA/TIA-232 OUTPUTS CMOS OUTPUTS EIA/TIA-232 INPUTS* T1 T2 R1 R2 + + 0.1µF 10V 0.1µF 10V GND ADM1385 +3.3V INPUT +3.3V TO +6.6V VOLTAGE DOUBLER +6.6V TO –6.6V VOLTAGE INVERTER C5 0.1µF *INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT C3 0.1µF 10V C4 0.1µF 10V Figure 3. |
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