Quad-Channel Isolator with
Integrated DC-to-DC Converter
Data Sheet
ADuM5400
Rev. B
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FEATURES
isoPower 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
Power supply start-up bias and gate drives
Isolated sensor interfaces
Industrial PLCs
GENERAL DESCRIPTION
The ADuM5400
1
device is a quad-channel digital isolator with
isoPower®, an integrated, isolated dc-to-dc converter. Based on
the Analog Devices, Inc., iCoupler® 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 iCoupler 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).
isoPower 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.
FUNCTIONAL BLOCK DIAGRAM
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OSC
RECT
4-CHANNEL iCOUPLER CORE
V
DD1
REG
GND
1
V
IA
V
IB
V
IC
V
ID
V
DDL
GND
1
V
ISO
GND
ISO
V
OA
V
OB
V
OC
V
OD
V
ISO
GND
ISO
ADuM5400
07509-001
Figure 1.
1
Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329.
