Linear Technology LTC2634 User manual

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This coversheet was created by Verical, a division of Arrow Electronics, Inc. (“Verical”). The attached document was created by the part supplier,

not Verical, and is provided strictly 'as is.' Verical, its subsidiaries, afﬁliates, employees, and agents make no representations or warranties

regarding the attached document and disclaim any liability for the consequences of relying on the information therein. All referenced brands,

product names, service names, and trademarks are the property of their respective owners.

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P.O. Box 740970

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Arrow Electronics, Inc

9201 East Dry Creek Road

Centennial, CO 80112

DC1488A-A

ANALOG DEVICES

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dc1488af

DEMO MANUAL DC1488A

DESCRIPTION

LTC2634

Quad 12-Bit SPI VOUT DAC

with Internal Reference

Demonstration circuit 1488A features the LTC

2634 quad

12-bit DAC. This device has an integrated, high accuracy,

low drift reference. It has a rail-to-rail output buffer and is

guaranteed monotonic. This DAC communicates through

the simple SPI/MICROWIRE compatible interface. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and

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

of their respective owners.

Design files for this circuit board are available at

http://www.linear.com/demo

ANALOG

OUTPUTS

TO DC590

DEMOBOARD TYPE LTC2634 VARIATION POWER UP FULL SCALE

DC1488A-A LZ Zero 2.5V

DC1488A-B LMI Mid-Scale 2.5V

DC1488A-C HZ Zero 4.096V

DC1488A-D HMI Mid-Scale 4.096V

dc1488af

DEMO MANUAL DC1488A

QUICK START PROCEDURE HARDWARE SETUP

Connect DC1488A 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. The correct control panel will be loaded

automatically. To update DAC values, enter new value in

corresponding output text box and press enter. Be sure

the DAC is enabled.

Complete software documentation is available from the

Help menu item, as features may be added periodically.

Analog Connections

DAC Outputs: The four DAC outputs from the LTC2634

are brought out to turrets labeled VOUTA through VOUTD.

These may be connected to external instruments or other

circuitry.

NOTE: DAC outputs are not in alphabetical order on the

circuit board.

VREF: The REF turret is connected directly to the reference

terminals of the LTC2634. When the integrated reference

is being used, the reference voltage may be monitored at

this point. An external reference may also be applied to this

turret after changing the setting in the QuikEval™ software.

Grounding And Power Connections

Power(VCC):NormallyDC1488AispoweredbytheDC590

controller. VCC can be supplied to this turret, however the

power supply on DC590 must be disabled! Refer to the

DC590 Quick Start Guide for more details on this mode

of operation.

Grounding: Ground turrets as well as 2 grounding strips

are provided.

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

1 3 C1, C3, C4 CAP., X7R, 0.1μF, 16V, 10%, 0603 AVX, 0603YC104KAT

2 1 C2 CAP., X5R, 10μF, 6.3V, 20%, 0603 AVX, 06036D106MAT

3 10 E1-E10 TESTPOINT, TURRET, 0.095" MILL-MAX, 2501-2-00-80-00-00-07-0

4 1 JP1 0.1" SINGLE ROW HEADER, 3-PIN SAMTEC, TSW-103-07-L-S

5 1 JP1 SHUNT, 0.1" BLK SAMTEC, SNT-100-BK-G

6 1 J1 HEADER, 2X7PIN, 0.079CC MOLEX, 87831-1420

7 2 R1, R2 RES., CHIP, 10k, 1/16W, 1%, 0603 VISHAY, CRCW060310K0FKEA

8 2 R3, R4 RES., CHIP, 4.99k, 1/16W, 1%, 0603 VISHAY, CRCW06034K99FKEA

9 1 U2 IC, 24LC025-I/ST, TSSOP MICROCHIP, 24LC025-I/ST

PARTS LIST

dc1488af

DEMO MANUAL DC1488A

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

dc1488af

DEMO MANUAL DC1488A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

LT 0411 • 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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