ANALOG DEVICES ADuM3160 Service Manual

V

BUS2

GND

2

V

DD2

SPD
PIN
DD–

DD+
GND

2

16
15
14

13

12

11
10

9

REG

PU LOGIC

REG

PU LOGIC

V

BUS1

GND

1

V

DD1

PDEN

SPU
UD–

UD+

GND

1

1
2
3

4

5

6
7
8

09125-001

Full/Low Speed 2.5 kV USB Digital Isolator

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
7 mA maximum upstream supply current at 1.5 Mbps
8 mA maximum upstream supply current at 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
RoHS compliant
Safety and regulatory approvals

UL recognition: 2500 V rms for 1 minute per UL 1577
CSA Component Acceptance Notice #5A

IEC 60950-1: 600 V rms

VDE Certificate of Conformity

DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
V

= 560 V peak

IORM

APPLICATIONS

USB peripheral isolation
Isolated USB hub

GENERAL DESCRIPTION

The ADuM31601 is a USB port isolator, based on Analog
Devices, Inc., iCoupler® technology. Combining high speed

operation

BUS

ADuM3160

CMOS and monolithic air core transformer technology, this
isolation component provides outstanding performance
characteristics and is easily integrated with low and full speed
USB-compatible peripheral devices.

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. Because the USB lines must switch
between actively driving D+/D− and allowing external resistors
to set the state of the bus, the ADuM3160 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 ADuM3160 uses the edge detection based iCoupler
technology in conjunction with internal logic to implement a
transparent, easily configured, upstream-facing port isolator.
Isolating the upstream port provides several advantages in
simplicity, power management, and robust operation.

The isolator has a 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
signaling level. The ADuM3160 provides isolated control of the
pull-up resistor to allow the peripheral to control connection
timing. The device draws low enough idle current that a suspend
state is not required. A 5 kV version, the ADuM4160, is also
available.

by internally regulating the voltage to the

BUSx

FUNCTIONAL BLOCK DIAGRAM

Figure 1.

1

Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,329.

Rev. A

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