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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.

isoPower 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.

FEATURES 2.5 kV fully isolated (power and data) RS-232 transceiver isoPower 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 61000-4-2 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