ADM3251E Series

Isolated Single Channel RS-232 Line Driver/Receiver

Catalog

Isolated Single Channel RS-232 Line Driver/Receiver

Part	Rise / Fall Time (Typ) [custom]	Rise / Fall Time (Typ) [custom]	Propagation Delay tpLH / tpHL (Max)	Isolated Power	Mounting Type	Package / Case	Package / Case [y]	Package / Case [y]	Voltage - Isolation	Type	Data Rate	Common Mode Transient Immunity (Min) [Min]	Channel Type	Number of Channels [custom]	Operating Temperature [Max]	Operating Temperature [Min]	Technology	Inputs - Side 1/Side 2	Voltage - Supply [Min]	Voltage - Supply [Max]	Supplier Device Package	Contents	Primary Attributes	Function	Supplied Contents	Embedded
Analog Devices ADM3251EARWZ-REEL	2.3 ns	2.3 ns	135 ns 190 ns		Surface Mount	20-SOIC	0.295 in	7.5 mm	2500 Vrms	RS232	460 Kbps	25 kV/µs	Unidirectional	2	85 °C	-40 °C	Magnetic Coupling	1/1	4.5 V	5.5 V	20-SOIC
Analog Devices EVAL-ADM3251EEB1Z										Interface												Accessories Board(s)	2.5 kV	Isolated RS-232	Accessories Board(s)

Catalog

Isolated Single Channel RS-232 Line Driver/Receiver

Key Features

• 2.5 kV fully isolated (power and data) RS-232 transceiver

• isoPower integrated, isolated dc-to-dc converter

• 460 kbps data rate

• 1 Tx and 1 Rx

• Meets EIA/TIA-232E specifications

• ESD protection on RINand TOUTpins±8 kV: contact discharge±15 kV: air gap discharge

• ±8 kV: contact discharge

• ±15 kV: air gap discharge

• 0.1 μF charge pump capacitors

• High common-mode transient immunity: >25 kV/μs

• Safety and regulatory approvalsUL recognition2500 V rms for 1 minute per UL 1577VDE Certificate of Conformity (pending)DIN EN 60747-5-2 (VDE 0884 Teil 2): 2003-01CSA Component Acceptance Notice #5A (pending)

• UL recognition2500 V rms for 1 minute per UL 1577

• 2500 V rms for 1 minute per UL 1577

• VDE Certificate of Conformity (pending)DIN EN 60747-5-2 (VDE 0884 Teil 2): 2003-01

• DIN EN 60747-5-2 (VDE 0884 Teil 2): 2003-01

• CSA Component Acceptance Notice #5A (pending)

• Operating temperature range: −40°C to +85°C

• Wide body, 20-lead SOIC package

Description

The ADM3251E is a high speed, 2.5 kV fully isolated, single- channel RS-232/V.28 transceiver device that operates from a single 5 V power supply. Due to the high ESD protection on the RINand TOUTpins, the device is ideally suited for operation in electrically harsh environments or where RS-232 cables are frequently being plugged and unplugged.The ADM3251E incorporates dual-channel digital isolators withisoPower™ integrated, isolated power. There is no requirement to use a separate isolated dc-to-dc converter. Chip-scale transformeriCoupler®technology from Analog Devices, Inc., is used both for the isolation of the logic signals as well as for the integrated dc-to-dc converter. The result is a total isolation solution.The ADM3251E containsisoPower technology that uses high frequency switching elements to transfer power through the transformer. Special care must be taken during printed circuit board (PCB) layout to meet emissions standards. Refer to Application Note AN-0971,Control of Radiated Emissions withisoPower Devices, for details on board layout considerations. The ADM3251E conforms to the EIA/TIA-232E and ITU-T V. 28 specifications and operates 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 5 V supply.The ADM3251E is available in a 20-lead, wide body SOIC package and is specified over the −40°C to +85°C temperature range.ApplicationsHigh noise data communicationsIndustrial communicationsGeneral-purpose RS-232 data linksIndustrial/telecommunications diagnostic portsMedical equipment