Linear Technology DC1529A Manuale utente

dc1529afa

DEMO MANUAL DC1529A

Description

LTC2657: 16-Bit Octal

Rail-to-Rail DAC

with I2C Interface

Demonstration circuit 1529A features the LTC2657 Octal

16-bit DAC with ±4LSB INL error. This device establishes

a new board-density benchmark for 16-bit DACs and

advances performance standards for output drive, cross-

talk and load regulation in single supply, voltage-output

multiple DACs. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

DC1529Ahasmany features forevaluating the performance

of the LTC2657.

Design files for this circuit board are available at

http://www.linear.com/demo/DC1529A

DEMO BOARD TYPE LT C 2657 VARIATION FULL SCALE

DC1529A-A LTC2657BCUFD-L16 2.5V

DC1529A-B LTC2657BCUFD-H16 4.096V

DC590

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DEMO MANUAL DC1529A

Quick start proceDure

Connect DC1529A to a DC590 USB serial controller using

the supplied 14 conductor ribbon cable. Connect DC590 to

a host PC with a standard USB A/B cable. Run the evalu-

ation software supplied with DC590 or download it from

www.linear.com/software. The correct control panel will

be loaded automatically.

If an external reference is used, click the “External” but-

ton in the control panel and enter the reference voltage

in the text block.

Complete software documentation is available from the

Help menu item, as features may be added periodically.

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DEMO MANUAL DC1529A

HarDware setup

Jumpers

JP1: VREF Select. Either an Internal or External reference

can be selected. To drive through the VREF pin, set to Ex-

ternal and connect a clean reference voltage to the VREF

turret. Default is the internal reference.

JP2: Power-Up Mode. The LTC2657 can be set to either

power-up in mid-scale or zero-scale. Default is zero-scale.

JP3, JP4, JP5: I2C Address Selection Jumpers. Set ad-

dress here and double check that the address selected in

software matches. By default all jumpers are tied to GND.

Analog Connections

DAC Outputs: The eight DAC outputs from the LTC2657

are brought out to turrets labeled VOUTA through VOUTH.

These may be connected to external instruments or other

circuitry.

Note: DAC outputs are not in alphabetical order on the

circuit board.

VREF:TheVREF turretis connecteddirectly tothe reference

terminals of the LTC2657. When the onboard reference

is being used, the reference voltage may be monitored at

this point. An external reference may also be applied to

this turret after setting JP1 to External.

Grounding and Power Connections

Power (VCC): Normally DC1529A is powered by the DC590

controller. VCC can be supplied to this turret, however

the power supply on DC590 must be disabled! Refer to

DC590 Quick Start Guide for more details on this mode

of operation.

Grounding: There is one common ground plane on the

board. All GND pins on the LTC2657 are tied to this ground

plane through low impedance paths. Use the GND turrets

as a reference point for measurements and connections

to external circuits.Tw o bare ground strips are provided

on the top and the bottom of the demo board.

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DEMO MANUAL DC1529A

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 3 C6, C7, C8 CAP., CHIP X7R 0.1µF 16V 0603 AVX, 0603YC104MAT1A

2 0 C1, C4 (Opt.) CAP., CHIP X7R 0.1µF 16V 0603 AVX, 0603YC104MAT1A

3 0 C2 (Opt.) CAP., CHIP X5R 4.7µF 6.3V 0805 TAIYO YUDEN, JMK212BJ475MG

4 0 C3, C5 (Opt.) CAP., CHIP X5R 10µF 6.3V 0805 TDK, C2012X5R0J106M

5 15 E1-E15 TURRET, TESTPOINT 0.064" MILL-MAX, 2308-2

6 0 PAD1, PAD2 Opt.

7 3 JP3-JP5 HEADER, 3-PIN 1 ROW 0.079CC SAMTEC, TMM-103-02-L-S

8 1 JP2 HEADER, 2-PIN 2 ROW 0.079CC SAMTEC, TMM-102-02-L-D

9 1 JP1 HEADER, 2-PIN 4 ROW 0.079CC SAMTEC, TMM-104-02-L-D

10 5 FOR (JP1-JP5) SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G

11 1 J1 HEADER, VERTICAL DUAL 2X7 0.079CC MOLEX, 87831-1420

12 3 R1-R3 RES., CHIP 4.99K 1% 0603 VISHAY, CRCW06034K99FKEA

13 0 U1 (Opt.) I.C., MICROPOWER SOT-23 LOW DROPOUT LINEAR TECH., LT1790ACS6

14 0 U2 (Opt.) I.C., PRECISION REFERENCE LINEAR TECH., LT1236ACS8-5

15 1 U4 I.C., SERIAL EEPROM, TSSOP-8 MICROCHIP, 24LC025-I/ST

DC1529A-A Required Circuit Components

16 1 U3 I.C., LTC2657BCUFD-L16, UFD-20 LINEAR TECH., LTC2657BCUFD-L16#

DC1529A-B Required Circuit Components

16 1 U3 I.C., LTC2657BCUFD-H16, UFD-20 LINEAR TECH., LTC2657BCUFD-H16#

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DEMO MANUAL DC1529A

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

A A

B B

C C

D D

NOTES:

CA2CA1

VCC

GND

CA0

VCC

GND

LTC2657CUFD-16,

DACs with Integrated Reference

Ext2

VREF

Internal

External

GND

VCC

Ext1

PORSEL

Verify Proper And Reliable Operation In The Actual

Performance Or Reliability. Contact Linear Technology

Circuit Board Layout May Significantly Affect Circuit

Circuit That Meets Customer-Supplied Specifications;

Application. Component Substitution And Printed

Linear Technology Has Made A Best Effort To Design A

This Circuit Is Proprietary To Linear Technology And

However, It Remains The Customer's Responsibility To

Supplied For Use With Linear Technology Parts.

Applications Engineering For Assistance.

LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY

Customer Notice

Mid Scale

Zero Scale

Octal I2C 16-Bit Rail-to-Rail

(Opt.)

Demo Circuit 1529A

Linear Technology Corporation

1630 McCarthy Blvd.

Milpitas, CA. 95035

Phone (408) 432-1900

Fax (408) 434-0507 www.linear.com

Wednesday, April 22, 2009

Title

Size Document Number Rev.

Date: Sheet of

V+

VCC

V+

VCC

4.99K

E12

VOUTG

V+

E14

GND

VREF

JP4

pad2

SDA

Exposed Pad

Solder Side

LTC2657CUFD-16

VOUTE

PORSEL

VOUTB

REFIN/OUT

LDAC

CA1

SCL

SDA

CA2

VOUTG

VOUTH

VOUTD

VOUTC

REFCOMP

CA0

VOUTF

VCC

GND

REFLO

VOUTA

GND

4.99K

JP1

10uF

6.3V

VCC

0.1uF

JP2

LT1790ACS6

4 6

GND

VI VO

GND

0.1uF

0.1uF JP5

VOUTC

4.7uF

6.3V

10uF

6.3V

VOUTD

JP3

GND

HD2X7

V+

GND

SCK

MISO

SDA/MOSI

GND

EESDA

EEVCC

EESCL

EEGND

GND

0.1uF

VOUTA

pad1

SCL

4.99K

E10

VOUTE

0.1uF

E13

VOUTH

E15

LDAC

VOUTB

24LC025

6 3

8A0

SCL A2

VSSSDA

A1WP

VCC

GND

LT1236ACS8-5

VIN

GND

VOUT

E11

VOUTF

dc1529afa

DEMO MANUAL DC1529A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

 LINEAR TECHNOLOGY CORPORATION 2010

LT 1013 • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LT C ) 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 LT C 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 LT C 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. LT C assumes no liability for applications assistance,

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

LT C 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 LT C applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Mouser Electronics

Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information:

Analog Devices Inc.:

DC1529A-B DC1529A-A

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