Datasheet

±15 kV ESD Protected
Dual RS-422 Transceiver
Data Sheet
ADM4168E
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2012 Analog Devices, Inc. All rights reserved.
FEATURES
Dual transceivers for RS-422
ESD protection on bus input/output pins
±15 kV human body model (HBM)
±8 kV IEC 61000-4-2, contact discharge
±8 kV IEC 61000-4-2, air discharge
Complies with TIA/EIA-422-B and ITU-T recommendation V.11
Open-circuit fail-safe
Suitable for 5 V power supply applications
Low supply current operation: 9 mA maximum
Low driver output skew
Receiver input impedance: 30 kΩ
Receiver common-mode range: 7 V to +7 V
Power-up/power-down without glitches
16-pin TSSOP package
Operating temperature range: −40°C to +85°C
APPLICATIONS
RS-422 interfaces
High data rate motor control
Single-ended-to-differential signal conversion
Point-to-point and multidrop transmission systems
FUNCTIONAL BLOCK DIAGRAM
RO1
DE1
DI1
V
CC
A1
B1
GND
D1
R1
ADM4168E
Z1
Y1
RO2
DE2
DI2
B2
A2
D2
R2
Y2
Z2
10820-001
Figure 1.
GENERAL DESCRIPTION
The ADM4168E has dual RS-422 transceivers suitable for
high speed communication on point-to-point and multidrop
transmission lines. The ADM4168E is designed for balanced
transmission lines and complies with TIA/EIA-422-B.
The differential driver outputs and receiver inputs feature electro-
static discharge circuitry that provides protection up to ±15 kV
HBM and ±8 kV IEC 61000-4-2 (contact and air discharge).
The ADM4168E operates from a single 5 V power supply.
Excessive power dissipation caused by bus contention or output
shorting is prevented by short-circuit protection circuitry. Short-
circuit protection circuits limit the maximum output current to
150 mA during fault conditions.
The receivers of the ADM4168E contain a fail-safe feature that
results in a logic high output state if the inputs are unconnected
(floating).
The ADM4168E is fully specified over the commercial and
industrial temperature ranges and is available in a 16-pin
TSSOP package.

Summary of content (12 pages)