EVAL-ADG772EBZ Datasheet EVAL-ADG772EBZ | P1-P3

Evaluation Board for CMOS Low Power Dual 2:1

Mux/Demux USB 2.0 (480 Mbps)/USB 1.1 (12 Mbps)

EVAL-ADG772

Rev. 0

Evaluation boards are only intended for device evaluation and not for production purposes.

Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or

statutory including, but not limited to, any implied warranty of merchantability or fitness for a

particular purpose. No license is granted by implication or otherwise under any patents or other

intellectual property by application or use of evaluation boards. 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. Trademarks and registered trademarks are the property of their respective owners.

Evaluation boards are not authorized to be used in life support devices or systems.

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

Tel: 781.329.4700 www.analog.com

FEATURES

Full-featured evaluation board for ADG772

On-board USB connectors

No external power supply needed

GENERAL DESCRIPTION

This data sheet describes the evaluation board for the ADG772,

which is a low voltage, CMOS device that contains two

independently selectable, single-pole, double-throw (SPDT)

switches. The ADG772 is designed as a general analog-to-

digital switch that can be used for routing both USB 1.1

(12 Mbps) and USB 2.0 (480 Mbps) signals.

Figure 1 shows the EVAL-ADG772 evaluation board. The

ADG772 is soldered onto the evaluation board in a tiny

1.3 mm × 1.6 mm ultra thin LFCSP located in the center of the

board and is designated as U1. The EVAL-ADG772 can be used

without an external power supply; in which case, the USB

supply powers the device.

The evaluation kit contains a fully fitted PCB and a CD that

contains the

ADG772 and the EVAL-ADG772 data sheets.

Refer to the

ADG772 data sheet for full data on the part.

Consult the

ADG772 data sheet in conjunction with this data

sheet when using the evaluation board.

CONNECTING SIGNALS TO THE BOARD

The board is fitted with three USB connectors that allow the

host to switch between two USB devices. All signals applied to

the switch can be monitored using the test points provided on

the board.

EVALUATION BOARD

06753-001

Figure 1.

EVAL-ADG772

Rev. 0 | Page 2 of 8

TABLE OF CONTENTS

Features .............................................................................................. 1

General Description......................................................................... 1

Connecting Signals to the Board.................................................... 1

Evaluation Board .............................................................................. 1

Revision History ............................................................................... 2

Hardware Description...................................................................... 3

Power Supply................................................................................. 3

Switch Control Connectors......................................................... 3

Evaluation Board Schematics...........................................................4

ADG772 Switch Pins, Test Points, and Connections ...............5

PCB Drawings....................................................................................6

Ordering Information.......................................................................8

Component Listing .......................................................................8

Ordering Guide .............................................................................8

ESD Caution...................................................................................8

REVISION HISTORY

9/07—Revision 0: Initial Version

EVAL-ADG772

Rev. 0 | Page 3 of 8

HARDWARE DESCRIPTION

06753-002

ADG772 EVALUATION BOARD

TO USB DEVICE 1

USB DEVICE 1

ADG772

TO USB DEVICE 2

USB DEVICE 2

TO USB HOST

USB HOST

L3 L2

SMB CONNECTORS

CONTROL SECTION:

SWITCHES CAN BE CONTROLLED MANUALLY BY

CHANGING JUMPER POSITIONS OR FROM AN EXTERNAL

SIGNAL SOURCE TO THE SMB CONNECTORS.

Figure 2. Evaluation Board Application

The ADG772 evaluation kit contains a fully fitted PCB and a CD

that contains the ADG772 and the EVAL-ADG772 data sheets.

The evaluation board allows the user to connect the host to the

ADG772. The ADG772 then allows the host to switch between

two USB devices connected to the evaluation board by using the

on-board jumpers or by applying the correct control signals to

the appropriate connectors.

The following sections describe in detail the function of the

connectors and links.

POWER SUPPLY

For convenience, a regulator supplies the ADG772 with a 3.3 V

supply. If an external power supply is used, a supply range of

3.3 V to 12 V can be connected to J6.

The EVAL-ADG772 can also be powered from the USB port

from the PC. No additional power supply is required in this case.

Ensure L1 is set to Position A to use the USB voltage supply and

set to Position B to use an external supply.

SWITCH CONTROL CONNECTORS

The ADG772 device offers a standard CMOS/LVTTL parallel

interface consisting of two IN inputs. The input pins of the

ADG772, IN1 and IN2, control the switch state and operation

modes. The evaluation board allows users to control the signals

required to set the logic levels applied to these pins by using

links L2 and L3 as described in

Table 1 or by applying external

signals to the SMB connectors, IN1 and IN2, respectively, as

described in

Table 2.

To control the ADG772 using the SMB connectors, L2 and L3

must be set to Position B. Note that there are 51 Ω termination

resistors to GND at the IN1 and IN2 SMB connectors.

Table 1. Control via Link L2/Link L3

Switch Status

L2 and L3 Position

USB Device 1 Status USB Device 2 Status

A Inactive Active

B Active Inactive

Table 2. Control via SMB Connector Settings

L2 and L3 Position Switch Status—USB Device Status

B SMB High = USB Device 2 Active

SMB Low = USB Device 1 Active

P1-P3 P4-P6 P7-P8

EVAL-ADG772EBZ

Mfr. #:

Buy EVAL-ADG772EBZ

Manufacturer:

Analog Devices Inc.

Description:

ADG772 Analog Switch Multiplexer Evaluation Board

Lifecycle:

New from this manufacturer.

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EVAL-ADG772EBZ