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/ADuM3160 USB Isolator Evaluation Board INTRODUCTION FEATURES OF THE ADuM4160/ADUM3160 USB use has displaced older communications standards, such The ADuM4160 and ADum3160 provide support for full speed as RS-232, as the default serial communications port in PC-based and low speed data communications by interfacing directly with systems. When compared to these other standards, USB has the USB xD+ and xD lines. The parts are designed to be many enhanced features, such as power for peripherals, automatic transparent to USB data traffic other than adding about as driver installation, and higher data rates. However, when using much delay as a hub and cable. Features of the isolator include USB, it is difficult to provide isolation, which has limited its the following: acceptance in medical and industrial applications. Built-in voltage regulators allow the ADuM4160 and Analog Devices, Inc., has introduced the ADuM4160 and ADuM3160 to draw power from either 5 V or 3.3 V ADuM3160 USB isolators to address the difficult task of sources. isolating the bus. The EVAL-ADuM4160EBZ USB isolator Application of the upstream pull-up resistor is under the evaluation board was constructed to allow an easy interface to control of a downstream pin, PIN (Pin 12). existing applications by standard cabling or discrete wiring. The operating speed of the isolator is set by pins on the upstream and downstream sides of the part, SPU and SPD The USB evaluation board comes populated with an (Pin 5 and Pin 13, respectively). ADuM4160 however, because the ADuM4160 and ADuM3160 are electrically identical and pin compatible, any evaluation The upstream side of the isolator includes Pin 1 through Pin 8, done with this board and component applies directly to the is connected to the left side of the evaluation board, and ADuM3160. If for some reason the user wants to substitute interfaces through a Type B connector. The downstream facing theADuM3160 on the PCB, no other changes are required. side includes Pin 9 through Pin 16, is connected to the right The design goals of this evaluation platform are to side of the evaluation board, and interfaces through a Type A connector. Connect to systems through standard USB Type A and Type B connectors. The evaluation board allows configuration of all of the features of the ADuM4160/ADuM3160 chip and provides support for a Draw power from the USB host or from an external 5.0 V variety of possible power schemes. The board also allows or 3.3 V power supply. common-mode voltages however, it is not recommended for Support isolated power for the downstream interface performing safety related testing, such as high voltage withstand through an ADuM5000 isoPower dc-to-dc converter. testing. Perform this type of testing on the component level or on a Support external downstream power from a 5 V or 3.3 V production board. power supply. Provide test points for all power and signal paths. EVALUATION BOARD Support low and full speed communications. Support enumeration control. Support external ESD protection. Support common-mode chokes in the xD+/xD lines. Support ferrite inductors in the V and GND lines. BUSx x Figure 1. USB Evaluation Board Please see the last page for an important warning and disclaimers. Rev. A Page 1 of 8 08418-001UG-043 Evaluation Board User Guide TABLE OF CONTENTS Introduction ...................................................................................... 1 Speed Selection ..............................................................................4 Features of the ADuM4160/ADuM3160 ....................................... 1 Pull-Up Control .............................................................................4 Evaluation Board .............................................................................. 1 Series Resistors...............................................................................4 Revision History ............................................................................... 2 Test Points ......................................................................................4 Power .................................................................................................. 3 Optional Components ..................................................................4 Upstream Side ............................................................................... 3 Evaluation Board Schematic and Artwork .....................................5 Downstream Side.......................................................................... 3 Grounding Scheme ....................................................................... 3 REVISION HISTORY 9/10Rev. 0 to Rev. A Added ADuM3160 ........................................................ Throughout Changes to Introduction .................................................................. 1 2/10Revision 0: Initial Version Rev. A Page 2 of 8