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Quad-Channel Isolator with
Integrated DC-to-DC Converter
Data Sheet
FEATURES
iso Power integrated, isolated dc-to-dc converter
Regulated 5 V output
500 mW output power
Quad dc-to-25 Mbps (NRZ) signal isolation channels
Schmitt trigger inputs
16-lead SOIC package with >7.6 mm creepage
High temperature operation: 105°C maximum
High common-mode transient immunity: >25 kV/μs
Safety and regulatory approvals
UL recognition
2500 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A
VDE certificate of conformity (pending)
IEC 60747-5-2 (VDE 0884, Part 2)
V IORM = 560 V peak
APPLICATIONS
RS-232/RS-422/RS-485 transceivers
Industrial field bus isolation
ADuM5400
GENERAL DESCRIPTION
The ADuM5400 1 device is a quad-channel digital isolator with
iso Power?, an integrated, isolated dc-to-dc converter. Based on
the Analog Devices, Inc., i Coupler? technology, the dc-to-dc
converter provides up to 500 mW of regulated, isolated power
with 5.0 V input and 5.0 V output voltages. This architecture
eliminates the need for a separate, isolated dc-to-dc converter in
low power, isolated designs. The i Coupler chip scale transformer
technology is used to isolate the logic signals and the magnetic
components of the dc-to-dc converter. The result is a small form
factor, total isolation solution.
The ADuM5400 isolator provides four independent isolation
channels in two speed grades (see the Ordering Guide for more
information).
iso Power 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 for details
on board layout recommendations.
Power supply start-up bias and gate drives
Isolated sensor interfaces
Industrial PLCs
FUNCTIONAL BLOCK DIAGRAM
V DD1 1
OSC
RECT
REG
16
V ISO
GND 1 2
15
GND ISO
V IA 3
V IB 4
V IC 5
V ID 6
V DDL 7
GND 1 8
4-CHANNEL i COUPLER CORE
ADuM5400
14
13
12
11
10
9
V OA
V OB
V OC
V OD
V ISO
GND ISO
Figure 1.
1
Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329.
Rev. B
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 ?2008–2012 Analog Devices, Inc. All rights reserved.
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