Full/Low Speed 5 kV USB Digital Isolator
Data Sheet
ADuM4160
Rev. D
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FEATURES
USB 2.0 compatible
Low and full speed data rate: 1.5 Mbps and 12 Mbps
Bidirectional communication
4.5 V to 5.5 V V
BUS
operation
7 mA maximum upstream supply current @ 1.5 Mbps
8 mA maximum upstream supply current @ 12 Mbps
2.3 mA maximum upstream idle current
Upstream short-circuit protection
Class 3A contact ESD performance per ANSI/ESD STM5.1-2007
High temperature operation: 105°C
High common-mode transient immunity: >25 kV/μs
16-lead SOIC wide-body package version
16-lead SOIC wide body enhanced creepage version
RoHS compliant
Safety and regulatory approvals (RI-16 package)
UL recognition: 5000 V rms for 1 minute per
UL 1577
CSA Component Acceptance Notice #5A
IEC 60601-1: 250 V rms (reinforced)
IEC 60950-1: 400 V rms (reinforced)
VDE Certificate of Conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
V
IORM
= 846 V peak
APPLICATIONS
USB peripheral isolation
Isolated USB hub
Medical applications
GENERAL DESCRIPTION
The ADuM4160
1
is a USB port isolator, based on Analog Devices,
Inc., iCoupler® technology. Combining high speed CMOS and
monolithic air core transformer technology, these isolation
components provide outstanding performance characteristics
and are easily integrated with low and full speed USB-compatible
peripheral devices.
FUNCTIONAL BLOCK DIAGRAM
1
V
BUS1
2
GND
1
3
V
DD1
7
UD+
8
GND
1
4
PDEN
16
V
BUS2
15
GND
2
14
V
DD2
11
DD–
10
DD+
9
GND
2
13
SPD
12
PIN
5
SPU
6
UD–
REG
PU LOGIC
REG
08171-001
PD LOGIC
Figure 1.
Many microcontrollers implement USB so that it presents only
the D+ and D− lines to external pins. This is desirable in many
cases because it minimizes external components and simplifies
the design; however, this presents particular challenges when
isolation is required. USB lines must automatically switch between
actively driving D+/D−, receiving data, and allowing external
resistors to set the idle state of the bus. The ADuM4160 provides
mechanisms for detecting the direction of data flow and control
over the state of the output buffers. Data direction is determined
on a packet-by-packet basis.
The ADuM4160 uses the edge detection based iCoupler tech-
nology in conjunction with internal logic to implement a
transparent, easily configured, upstream facing port isolator.
Isolating an upstream facing port provides several advantages
in simplicity, power management, and robust operation.
The isolator has propagation delay comparable to that of a
standard hub and cable. It operates with the bus voltage on
either side ranging from 4.5 V to 5.5 V, allowing connection
directly to V
BUS
by internally regulating the voltage to the signaling
level. The ADuM4160 provides isolated control of the pull-up
resistor to allow the peripheral to control connection timing.
The device has a low idle current; so a suspend mode is not
required. A 2.5 kV version, the ADuM3160, is also available.
1
Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,329.
