herunterladen
EVAL-ADuM4160EBZ User Guide
UG-043
One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Te l: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
iCoupler ADuM4160/ADuM3160 USB Isolator Evaluation Board
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. B | Page 1 of 8
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 ADuM4160 and
ADuM3160 iCoupler® USB isolators to address the difficult task
of isolating the bus. The EVAL-ADuM4160EBZ USB isolator
evaluation board allows for an easy interface to existing
applications by standard cabling or discrete wiring.
This USB evaluation board comes populated with an ADuM4160;
however, because the ADuM4160 and ADuM3160 are electrically
identical and pin compatible, any evaluation done with this board
and component also applies directly to the ADuM3160. If the
user wants to substitute the ADuM3160 on the printed circuit
board (PCB), no other changes are required.
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 isoPower® dc-to-dc converter.
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 electrostatic discharge (ESD) protection.
Support common-mode chokes in the xD+/xD− lines.
Support ferrite inductors in the VBUSx and GNDx lines.
For full details, see the ADuM4160 and the ADuM3160 data
sheets, which must be used in conjunction with this user guide
when using the EVAL-ADuM4160EBZ evaluation board.
EVAL-ADuM4160EBZ EVALUATION BOARD
08418-001
Figure 1.
FEATURES OF THE ADuM4160/ADuM3160
The ADuM4160 and ADuM3160 provide support for full speed
and low speed data communications by interfacing directly with
the USB xD+ and xD− lines. The devices are 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 that allow the ADuM4160 and
the ADuM3160 to draw power from either 5 V or 3.3 V
sources.
Application of an upstream pull-up resistor is under the
control of the downstream pin, PIN (Pin 12).
Pins on the upstream and downstream sides of the device,
SPU and SPD (Pin 5 and Pin 13, respectively), can set the
operating speed of the isolator.
The upstream side of the isolator includes Pin 1 through Pin 8,
is connected to the left side of the evaluation board, and inter-
faces through a Type B connector. The downstream facing side
includes Pin 9 through Pin 16, is connected to the right side of
the evaluation board, and interfaces through a Type A connector.
The evaluation board allows configuration of the features of the
ADuM4160/ADuM3160 chip and provides support for a variety
of possible power schemes. The evaluation 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.
Verzeichnis
- ・ Teilenummerierungssystem on Seite 8
- ・ Blockdiagramm on Seite 5
- ・ Anwendungsbereich on Seite 3
