500 kbps, 5.7 kV RMS, Signal Isolated

RS-485 Transceiver with ±15 kV IEC ESD

Data Sheet

ADM2461E/ADM2463E

Rev. 0

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FEATURES

5.7 kV rms, signal isolated RS-485/RS-422 transceiver

Low radiated emissions, passes EN55032 Class B with margin

on a 2-layer PCB

Cable inversion smart feature

Correction for reversed cable connection on A, B, Y, and Z bus

pins while maintaining full receiver fail-safe

ESD protection on the RS-485 A, B, Y, and Z bus pins

≥±12 kV IEC61000-4-2 contact discharge

≥±15 kV IEC61000-4-2 air discharge

Low speed 500 kbps data rate for EMI control

Flexible power supply inputs

Wide −40°C to +125°C operating temperature range

High common-mode transient immunity: >250 kV/μs

Short-circuit, open-circuit, and floating input receiver fail-safe

Supports 192 bus nodes (72 kΩ receiver input impedance)

Full hot swap support (glitch free power-up and power-down)

Safety and regulatory approvals (pending)

CSA Component Acceptance Notice 5A, DIN V VDE V 0884-11,

UL 1577, CQC11-471543-2012, IEC 61010-1

16-lead, wide body, SOIC_W package with >8.0 mm

creepage and clearance in standard pinout

APPLICATIONS

Heating, ventilation, and air conditioning (HVAC) networks

Industrial field buses

Building automation

Utility networks

FUNCTIONAL BLOCK DIAGRAMS

ADM2461E

RxD

INV

DE

ISOLATION

BARRIER

GND1

RE

TxD

RS-485 TRANSCEIVER

D

R

GND2

CABLE

INVERT

B

A

DIGITAL ISOLATION

Figure 1. ADM2461E Functional Block Diagram

ADM2463E

RxD

INVR

DE

ISOLATION

BARRIER

GND1

RE

TxD

Y

Z

RS-485 TRANSCEIVER

D

R

GND2

CABLE

INVERT

A

B

DIGITAL ISOLATION

Figure 2. ADM2463E Functional Block Diagram

GENERAL DESCRIPTION

The ADM2461E/ADM2463E are 500 kbps, 5.7 kV rms, signal

isolated RS-485 transceivers that pass radiated emissions testing to

the EN55032 Class B standard with margin on a 2-layer printed

circuit board (PCB). The ADM2461E/ADM2463E isolation

barrier provides robust immunity to noise and system level EMC

events. The devices are protected against ≥±12 kV contact and ≥

±15 kV air IEC61000-4-2 electrostatic discharge (ESD) events

on the RS-485 A, B, Y, and Z pins. The devices feature cable invert

pins to allow quick correction of the reversed cable connection

on the A, B, Y, and Z bus pins while maintaining full receiver

fail-safe performance.

These devices are optimized for low speed over long cable runs

and have a maximum data rate of 500 kbps. The high differential

output voltage makes these devices suitable for Profibus nodes

voltages (1.7 V to 5.5 V and 3 V to 5.5 V, respectively). Half-

duplex and full duplex device options are available in the industry

standard 16-lead, wide-body, standard SOIC_W package with

>8.0 mm creepage and clearance.