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One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
iCoupler ADuM4160 USB Isolator Evaluation Board
INTRODUCTION
USB use has displaced older communications standards, such
as RS-232, as the default serial communications port in PC-based
systems. When compared to these other standards, USB has
many enhanced features, such as power for peripherals, automatic
driver installation, and higher data rates. However, when using
USB, it is difficult to provide isolation, which has limited its
acceptance in medical and industrial applications.
Analog Devices, Inc., has introduced the
isolator to address the difficult task of isolating the bus. The
ADuM4160 USB isolator evaluation board was constructed
to allow an easy interface to existing applications by standard
cabling or discrete wiring.
The design goals of this evaluation platform are to
•
Connect to systems through standard USB Type A and
Type B connectors.
•
Draw power from the USB host or from an external 5.0 V
or 3.3 V power supply.
•
Support isolated power for the downstream interface
through an
ADuM5000
•
Support external downstream power from a 5 V or 3.3 V
power supply.
•
Provide test points for all power and signal paths.
•
Support low and full speed communications.
•
Support enumeration control.
•
Support external ESD protection.
•
Support common-mode chokes in xD+/xD−.
•
Support ferrite inductors in V
Please see the last page for an important warning and disclaimers.
ADuM4160
USB
isoPower® dc-to-dc converter.
and GND
lines.
BUSx
x
EVALUATION BOARD
Figure 1. USB Evaluation Board
Evaluation Board User Guide
FEATURES OF THE ADuM4160
The ADuM4160 provides support for full speed and low speed
data communications by interfacing directly with the xD+ and
xD− lines. It is designed to be transparent to USB data traffic
other than adding about as much delay as a hub and cable.
Features of the isolator include the following:
•
Built-in voltage regulators allow the ADuM4160 to draw
power from either 5 V or 3.3 V sources.
•
Application of the upstream pull-up resistor is under the
control of a downstream pin, PIN (Pin 12).
•
The operating speed of the isolator is set by pins on the
upstream and downstream sides of the part, SPU and SPD
(Pin 5 and Pin 13, respectively).
The upstream side of the ADuM4160 is Pin 1 through Pin 8,
is connected to the left-hand side of the evaluation board, and
interfaces through a Type B connector. The downstream facing
side is Pin 9 through Pin 16, is connected to the right-hand side
of the evaluation board, and interfaces through a Type A connector.
The evaluation board allows configuration of all of the features of
the ADuM4160 chip as well as providing support for a variety of
possible power schemes. The board also allows common-mode
voltages; however, it is not recommended for performing safety
related testing, such as high voltage withstand testing. Perform this
type of testing on the component level or on a production board.
Rev. 0 | Page 1 of 8
UG-043
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Related Manuals for Analog Devices iCoupler ADuM4160
Summary of Contents for Analog Devices iCoupler ADuM4160
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Page 1: Introduction
Evaluation Board User Guide UG-043 One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com iCoupler ADuM4160 USB Isolator Evaluation Board INTRODUCTION FEATURES OF THE ADuM4160 USB use has displaced older communications standards, such... -
Page 2: Table Of Contents
UG-043 Evaluation Board User Guide TABLE OF CONTENTS Introduction ..................1 Speed Selection ................4 Features of the ADuM4160 ............. 1 Pull-Up Control ................4 Evaluation Board ................1 Series Resistors................4 Revision History ................2 Test Points ..................4 ... -
Page 3: Power
Evaluation Board User Guide UG-043 POWER UPSTREAM SIDE The ADuM5000 is only capable of providing 100 mA of power to the downstream side. Applications that require more power The USB standard requires that the upstream facing port of a at the downstream port must use the external power option. peripheral device derive power for its pull-up from the 5 V present The ADuM5000 has been provided for the convenience of the on the cable. -
Page 4: Speed Selection
Control of PIN is provided through Jumper JP6. The PIN input with 0 Ω resistors from Analog Devices. They are on the PCB is pulled high by a 10 kΩ resistor. When a shunt is placed across as a convenience to the end user. -
Page 5: Evaluation Board Schematic And Artwork
Evaluation Board User Guide UG-043 EVALUATION BOARD SCHEMATIC AND ARTWORK Figure 2. Evaluation Board Schematic Rev. 0 | Page 5 of 8... - Page 6 UG-043 Evaluation Board User Guide Figure 3. Evaluation Board Artwork Rev. 0 | Page 6 of 8...
- Page 7 Evaluation Board User Guide UG-043 NOTES Rev. 0 | Page 7 of 8...
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Page 8: Esd Caution
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. Analog Devices reserves the right to change devices or specifications at any time without notice.