Linear Technology DC890B Manual de usuario

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DEMO MANUAL DC890B

DESCRIPTION

DC890B QuickStart Guide

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and PScope

is a trademark of Linear Technology Corporation. All other trademarks are the property of their

respective owners.

BOARD PHOTO

Figure 1. DC890B Board

Demonstration circuit DC890B along with PScope™ soft-

ware provides a USB based Windows PC hosted digital

data acquisition system supporting CMOS/LVDS output

ADCs up to 250Msps. The DC890B must be powered from

an external 6VDC ±0.5VDC power supply when operat-

ing in LVDS mode. When operating in CMOS mode, the

external power supply is optional. The Linear Technology

supplied PScope evaluationsoftware automatically detects

the DC890B and can also detect many of the standard

ADC demonstration circuits boards. The DC890B will

not enable LVDS mode unless an external 6.0VDC power

source is available. This system provides for fast and easy

performance evaluation of high speed ADCs. DC890B

collects up to 256K word samples and then performs

various analyses on the data including calculating SNR,

SINAD, THD, SFDR and ENOB. The digitized input, an FFT

of the collected data, the primitive wave of the sample set

or an IFFT of modified frequency domain data is plotted to

a display window to facilitate analyzing distortion products

and sources. Figure 1 shows a picture of the DC890B. The

DC890B is connected to the ADC demonstration circuit via

a 100-pin edge connector, to the PC by a USB A-B cable and

to an optional power supply either by a 5mm power plug

or optionally by turrets. Figure 2 details the connections.

Design files for this circuit board are available at

http://www.linear.com/demo

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DEMO MANUAL DC890B

SCHEMATIC DIAGRAM

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DEMO MANUAL DC890B

SCHEMATIC DIAGRAM

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DEMO MANUAL DC890B

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

SCHEMATIC DIAGRAM

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DEMO MANUAL DC890B

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com

LT 0612 • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT

OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete

in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety

measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union

directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.

If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date

of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU

OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS

FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR

ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims

arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all

appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or

agency certified (FCC, UL, CE, etc.).

No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,

customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.

Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and

observe good laboratory practice standards. Common sense is encouraged.

This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

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