ADM3252E Isolated, Dual Channel RS-232 Line Driver/Receiver

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 Application Note AN-0971, 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.

Applications

Isolated RS-232 interface
High noise data communications
Industrial communications
Industrial/telecommunications diagnostic ports
Medical equipment

Features and Benefits

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 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
Operating temperature range: −40°C to +85°C
44-ball chip scale package ball grid array (CSP_BGA)
See data sheet for additional features

Interface & Isolation

Isolated RS-232

Aerospace and Defense

Solutions

Reference Designs

CN-0373 Design and Integration Files .ZIP

Data Sheets

Document	note
ADM3252E: Isolated, Dual Channel, RS-232 Line Driver/Receiver Data Sheet (Rev. A)	PDF 345 kB

User Guides

Document	note
UG-400: ezLINX iCoupler Isolated Interface Development Environment Hardware User Guide	PDF 393 kB
UG-461: ezLINX iCoupler Isolated Interface Development Environment Software User Guide	PDF 1915 kB
UG-440: Evaluating the ADM3252E Isolated, Dual Channel, RS-232 Line Driver/Receiver	PDF 457 kB