Linear Technology LTC2636 Guida rapida alla configurazione

dc1466bf

DEMO MANUAL DC1466B

Description

LTC2636

Octal 12-Bit SPI VOUT DACs with

10ppm/°C Internal Reference

Demonstration circuit 1466B features the LT C

2636 Octal

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 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/DC1466B

Figure 1

To DC590

Analog

Outputs

Table 1.

DEMO BOARD TYPE LTC2636 VARIATION (SUFFIX) POWER-UP OUTPUT FULL-SCALE OUTPUT VOLTAGE

A LZ Zero 2.5V

B LMI Mid-Scale 2.5V

C HZ Zero 4.096V

D HMI Mid-Scale 4.096V

dc1466bf

DEMO MANUAL DC1466B

Quick start proceDure

Connect DC1466B 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

QuikEval™ evaluation software supplied with DC590 or

download it from www.linear.com/software. The correct

control panel will be loaded automatically. The DAC is

updated as changes are made to the GUI screen. Entering

a voltage into a text box will cause the DAC's output to

update immediately. Values may be entered in voltage,

hexadecimal counts, or decimal counts by selecting the

appropriate radio button. The reference mode may also

be changed, and individual DACs can be powered down

by unchecking the "Enable" box.

Complete software documentation is available from the

Help menu item, as features may be added periodically.

Figure 2

dc1466bf

DEMO MANUAL DC1466B

HarDware setup

Analog Connections

DAC Outputs – The eight DAC outputs from the LTC2636

are brought out to turrets labeled VOUTA through VOUTH.

These may be connected to external instruments or other

circuitry.

DAC outputs are not in alphabetical order on the circuit

board.

REF – The REF turret is connected directly to the reference

pin of the LTC2636. When the integrated reference is be-

ing 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 evaluation software.

Digital Connections

LDAC – Loadpin,activelow,pulledtoVCC bya10kresistor.

Updates the DAC register from the Input register. Do not

assert this pin when using with the evaluation software.

This pin can be used to update all DACs simultaneously,

after individual input registers have been written to.

CLR –Clear pin, active low, pulled to VCC by a 10k resis-

tor. Asserting this pin clears all DACs to their default

power-up value.

Grounding and Power Connections

Power (VCC)–Normally DC1466 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 – Ground turrets as well as 2 grounding strips

are provided.

dc1466bf

DEMO MANUAL DC1466B

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Parts List – All Assembly Types

1 2 C1, C3 CAP., X5R, 0.1µF, 16V, 10%, 0402 AVX, 0402YD104KAT

2 1 C4 CAP., X7R, 0.1µF, 16V, 10%, 0603 AVX, 0603YC104KAT

3 1 C2 CAP., X5R, 10µF, 16V, 10%, 0805 AVX, 0805YD106KAT

4 13 E1–E13 TESTPOINT, TURRET, 0.065" MILL-MAX, 2308-2-00-80-00-00-07-0

5 1 J1 HEADER, 2×7 PIN, 0.079CC MOLEX, 87831-1420

6 2 R1, R2 RES., CHIP, 4.99k, 1/16W, 1%, 0603 VISHAY, CRCW06034K99FKEA

7 2 R3, R4 RES., CHIP, 10k, 1/16W, 1%, 0603 VISHAY, CRCW06010K0FKEA

8 1 U2 IC, EEPROM 2k BIT 400kHz 8 TSSOP MICROCHIP, 24LC025-I/ST

Parts List – DC1466B-A

2 1 U1 LTC2636CMS-LZ12#PBF, MSOP 16-PIN LINEAR TECH., LTC2636CMS-LZ12#PBF

Parts List – DC1466B-B

2 1 U1 LTC2636CMS-LMI12#PBF, MSOP 16-PIN LINEAR TECH., LTC2636CMS-LMI12#PBF

Parts List – DC1466B-C

2 1 U1 LTC2636CMS-HZ12#PBF, MSOP 16-PIN LINEAR TECH., LTC2636CMS-HZ12#PBF

Parts List – DC1466B-D

2 1 U1 LTC2636CMS-HMI12#PBF, MSOP 16-PIN LINEAR TECH., LTC2636CMS-HMI12#PBF

BoarD revision History

BOARD REV DATE DESCRIPTION

B 10/13

Original Design

Connected Floating Address Lines on ID EEPROM.

dc1466bf

DEMO MANUAL DC1466B

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

D D

C C

B B

A A

HDR2X7-079-MOLEX

-A

LTC2636CMS - HZ12

LTC2636CMS - LMI12-B

-C

-D

LTC2636CMS - LZ12

LTC PART#

Assy Table

LTC2636CMS - HMI12

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Wednesday, September 04, 2013

1 11

12-BIT, OCTAL SPI DAC WITH INTERNAL REFERENCE

Leo C.

N/A

LTC2636 FAMILY

DEMO CIRCUIT 1466B

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Wednesday, September 04, 2013

1 11

12-BIT, OCTAL SPI DAC WITH INTERNAL REFERENCE

Leo C.

N/A

LTC2636 FAMILY

DEMO CIRCUIT 1466B

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

Wednesday, September 04, 2013

1 11

12-BIT, OCTAL SPI DAC WITH INTERNAL REFERENCE

Leo C.

N/A

LTC2636 FAMILY

DEMO CIRCUIT 1466B

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

Leo C.

PRODUCTION110-10-12

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

Leo C.

PRODUCTION110-10-12

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

Leo C.

PRODUCTION110-10-12

0.1uF

C3 0.1uFC3 0.1uF

J1J1

VUNREG 1

5V 2

GND

SCK/SCL 4

MISO 5

CS 6

MOSI/SDA 7

GND

EESDA 9

EEVCC 10

EESCL 11

EEGND 12

GND

NC 14

E10 VOUTG

4.99K

Array

EEPROM

U2 24LC025-I/ST

Array

EEPROM

U2 24LC025-I/ST

SDA

5SCL

WP 7

GND

VCC

A2 3

A1 2

A0 1

E7 VOUTD

E1 VCC

10K

E2 GND

E11 VOUTH

10K

LTC2636-

SDI

SCK

CS/LD

VOUTA 2

GND

REF 11

CLR

VCC 1

LDAC

VOUTB 3

VOUTC 4

VOUTD 5

VOUTE 12

VOUTF 13

VOUTG 14

VOUTH 15

GND

E3 REF

E13 LDAC

E12 CLR

E8 VOUTE

E5 VOUTB

4.99K

SCKSCK

0.1uF

SDISDI

CS/LDCS/LD

E4 VOUTA

10uF

E9 VOUTF

E6 VOUTC

dc1466bf

DEMO MANUAL DC1466B

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

 LINEAR TECHNOLOGY CORPORATION 2013

LT 0913 • 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

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