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ADM3252E Datenblatt(PDF) 1 Page - Analog Devices |
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ADM3252E Datenblatt(HTML) 1 Page - Analog Devices |
1 / 16 page Isolated, Dual Channel, RS-232 Line Driver/Receiver Data Sheet ADM3252E Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother 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 ©2012 Analog Devices, Inc. All rights reserved. FEATURES 2.5 kV fully isolated (power and data) RS-232 transceiver iso Power integrated, isolated dc-to-dc converter Operational from single 3.3 V or 5 V supply 460 kbps data rate 2 × Tx and 2 × Rx channels Meets EIA/TIA-232E specifications ESD protection to IEC 1000-4-2 (801.2) on RINx and TOUTx pins Contact discharge: ±8 kV Air gap discharge: ±15 kV 0.1 μF charge pump capacitors High common-mode transient immunity: >25 kV/μs Safety and regulatory approvals (pending) UL recognition 2500 V rms for 1 minute per UL 1577 VDE certificate of conformity IEC 60747-5-2 (VDE 0884, Part 2) VIORM = 560 V peak CSA Component Acceptance Notice #5A Operating temperature range: −40°C to +85°C 44-ball chip scale package ball grid array (CSP_BGA) APPLICATIONS Isolated RS-232 interface High noise data communications Industrial communications Industrial/telecommunications diagnostic ports Medical equipment FUNCTIONAL BLOCK DIAGRAM Figure 1. GENERAL DESCRIPTION The ADM3252E is a high speed, 2.5 kV, fully isolated, dual- channel RS-232/V.28 transceiver device that is operational from a single 3.3 V or 5 V power supply. Because of high ESD protection on the RIN1, RIN2, TOUT1, and TOUT2 pins, the ADM3252E is ideally suited for operation in electrically harsh environments or where RS-232 cables are frequently plugged and unplugged. The ADM3252E provides four independent isolation channels using the integrated and isolated power of isoPower™. There is no requirement to use a separate isolated dc-to-dc converter. Chip scale transformer iCoupler® technology from Analog Devices, Inc., is used for both the isolation of the logic signals and the integrated dc-to-dc converter. The result is a total isolation solution. iso Power technology in the ADM3252E uses high frequency switching elements to transfer power through its transformer. Special care must be taken during printed circuit board (PCB) layout to meet emissions standards. Refer to the AN-0971 Application Note, Recommendations for Control of Radiated Emissions with isoPower Devices, for details on board layout considerations. The ADM3252E conforms to the EIA/TIA-232E and ITU-T V.28 specifications and operates at data rates of 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 or 5 V supply. The ADM3252E is available in a 44-ball, chip scale package ball grid array (CSP_BGA) and is specified over the −40°C to +85°C temperature range. RECT REG V– C4 0.1µF 16V VOLTAGE DOUBLER C1+ C1– V+ VISO C2+ C2– VOLTAGE INVERTER VCC GND GNDISO ADM3252E OSC DECODE R ROUT1 RIN1* ENCODE TIN1 T TOUT1 ENCODE DECODE DECODE R ROUT2 RIN2* ENCODE TIN2 T TOUT2 ENCODE DECODE C3 0.1µF 10V C2 0.1µF 16V 0.1µF 10µF C1 0.1µF 16V *INTERNAL 5kΩ PULL-DOWN RESISTOR ON THE RS-232 INPUTS. |
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