EVAL-CN0158-EB1Z Analog Devices Inc, EVAL-CN0158-EB1Z Datasheet

EVAL-CN0158-EB1Z

Manufacturer Part Number

EVAL-CN0158-EB1Z

Description

BOARD, EVAL, FOR CN0158

Manufacturer

Analog Devices Inc

Type

USB Hub Isolatorr

Series

-r

Datasheet

1.EVAL-CN0159-EB1Z.pdf (5 pages)

Specifications of EVAL-CN0158-EB1Z

Kit Contents

Board

Mcu Supported Families

CN0158

Svhc

No SVHC (15-Dec-2010)

Rohs Compliant

Yes

Silicon Manufacturer

Analog Devices

Silicon Core Number

CN0158

Design Resources

USB Hub Isolator Circuit (CN0158)

Main Purpose

Interface, Isolator USB HUB

Embedded

Utilized Ic / Part

ADuM4160, ADP3330, ADP3339

Primary Attributes

Secondary Attributes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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EVALUATION AND DESIGN SUPPORT

Circuit Evaluation Boards

Design and Integration Files

CIRCUIT FUNCTION AND BENEFITS

The universal serial bus (USB) is rapidly becoming the standard

interface for most PC peripherals. It is displacing RS-232 and

the parallel printer port because of superior speed flexibility

and support of device hot swap. There has been a strong desire

on the part of industrial and medical equipment manufacturers

to use the bus as well, but adoption has been slow because there

has not been a good way to provide the isolation required for

connections to machines that control dangerous voltages or low

leakage defibrillation proof connections in medical applications.

The

for a peripheral USB device. However, there are occasions when

it is useful to create an isolated cable function. Several issues

must be addressed to use the

Whereas the buffers on the upstream and downstream sides of

the

cable, the downstream buffers must be capable of adjusting

speed to a full or low speed peripheral that is connected to it.

The upstream connection must act like a peripheral, and the

downstream connection must behave like a host.

Unlike the case of building a dedicated peripheral

interface where the speed is known and not changed,

host applications must adapt to detect whether a low

or full speed device has been connected. The

is intended to be hardwired to a single speed via pins; therefore,

it works when the peripheral plugged into its downstream side

is the correct speed, but it fails when the wrong speed

peripheral is attached. The best way to address this is to

combine the

Rev. A

Circuits from the Lab™ circuits from Analog Devices have been designed and built by Analog Devices

engineers. Standard engineering practices have been employed in the design and construction of

each circuit, and their function and performance have been tested and verified in a lab environment at

room temperature. However, you are solely responsible for testing the circuit and determining its

suitability and applicability for your use and application. Accordingly, in no event shall Analog Devices

be liable for direct, indirect, special, incidental, consequential or punitive damages due to any cause

whatsoever connected to the use of any Circuits from the Lab circuits. (Continued on last page)

Schematics, Layout Files, Bill of Materials

CN-0159 Circuit Evaluation Board

ADuM4160

are the same and capable of driving a USB

is designed primarily as an isolation element

Circuits from the Lab™ tested circuit designs address

common design challenges and are engineered for

quick and easy system integration. For more information

and/or support, visit

with a hub controller.

ADuM4160

Universal Serial Bus (USB) Cable Isolator Circuit

for this application.

www.analog.com/CN0159.

ADuM4160

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

The upstream side of a hub controller can be thought of

as a standard fixed speed peripheral port that can be easily

isolated with the ADuM4160, whereas the downstream ports

are all handled by the hub controller. However, in many cases,

while it is not certifiable as fully USB compliant, a single speed

cable is acceptable from a practical standpoint, especially if

custom connectors are used so that it cannot be confused with a

compliant device. The hub chip can be eliminated, and the

design becomes very small and simple.

The

implement an isolation buffer for medical and industrial

peripherals. The challenge that must be met is to use this to

create a bus-powered cable isolator by pairing the

with a small isolated dc-to-dc converter such as the

ADuM5000. As with isolating any device, the services that

the

The goal of the application circuit shown in Figure 1 is to isolate

a peripheral device that already implements a USB interface. It

is not possible to make a fully compliant bus-powered cable

because there are no 100% efficient power converters to transfer

the bus voltage across the barrier. In addition, the quiescent

current of the converter does not comply with the standby

current requirements of the USB standard. This is all in

addition to the speed detection limitations of the ADuM4160.

What can be achieved is a fixed speed or switch-controlled

speed cable that can supply a modest power to the downstream

peripheral. However, it is a custom application that is not

completely compliant with the USB standard.

ADuM4160

Directly isolates, in the upstream, the USB D+ and

D− lines of a cable.

Implements an automatic scheme for data flow of

control that does not require external control lines.

Provides medical grade isolation.

Supports full speed or low speed signaling rates.

Supports isolated power delivery through the cable.

Devices Connected/Referenced

ADuM4160

ADuM1100

ADuM5000

provides are as follows:

provides an inexpensive and easy way to

Full/Low Speed USB Isolator

Digital Isolator

Isolated DC-to-DC Converter

Circuit Note

www.analog.com

CN-0159

ADuM4160

Related parts for EVAL-CN0158-EB1Z

EVAL-CN0158-EB1Z Summary of contents

Page 1

... For more information and/or support, visit Universal Serial Bus (USB) Cable Isolator Circuit EVALUATION AND DESIGN SUPPORT Circuit Evaluation Boards CN-0159 Circuit Evaluation Board Design and Integration Files Schematics, Layout Files, Bill of Materials ...

Page 2

CN-0159 Figure 1. USB Cable Isolator Circuit Rev Page Circuit Note 09048-001 ...

Page 3

Circuit Note CIRCUIT DESCRIPTION Power for the upstream USB connector is derived from the 5 V VBUS voltage available on the USB cable. The bus voltage also drives an ADuM5000, which is used to create a VBUS2 voltage for the ...

Page 4

... Information regarding the isolator components used in the circuit can be found in the ADuM1100, the ADuM4160, and the ADuM5000 user guide UG-043, and the evaluation board user guide for the 16-lead SOIC and 16-lead QSOP digital isolators, UG-042. Functional Block Diagram See Circuit Description section for the schematic and information regarding the described test setup ...

Page 5

... ADuM4160 Evaluation Board ADuM1100 Data Sheet ADuM1100 Evaluation Board ADuM5000 Data Sheet ADuM5000 Evaluation Board REVISION HISTORY 11/10—Rev Rev. A Added Evaluation and Design Support Section ............................ 1 Changes to Circuit Description Section......................................... 3 Added Circuit Evaluation and Test Section ................................... 4 7/10—Revision 0: Initial Version Rev Page CN-0159 ...

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