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