DC1767A - ANALOG DEVICES - Product.Network

dc1767f

DEMO MANUAL DC1767

DESCRIPTION

LTC2997

Remote/Internal

Temperature Sensor

Demonstration circuit 1767 features the LTC

2997, a high

accuracy, analog output, temperature sensor.

DC1767 is designed to allow easy evaluation of the LTC2997. 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.

Design files for this circuit board are available at

http://www.linear.com/demo

QUICK START PROCEDURE

Jumper Settings

D+/D–: These jumpers select which temperature input con-

nects to the LTC2997. INT uses the internal temperature

sensor, EXT uses an off-board sensor connected to the

D+/D– analog inputs, and Q1 uses the transistor stuffed

in Q1 (the MMBT3904 by default).

Analog Connections

Analog signal connections are made via the row of turret

posts along the edges of the board.

GND: (2 turrets) These turrets connect directly to the

internal ground planes.

VCC: Connect a 2.25V to 5.5V power supply to this turret.

D+/D–: Should be set to EXT. This is where the external

diode should be connected.

VREF: Output Only. 1.8V ouput that can drive up to ±200μA

of load.

VPTAT: The voltage on this turret is proportional to the

sensor’s absolute temperature, with a slope of 4mV/K.

VPTAT can drive up to a ±200μA load and up to 1000pF

capacitive load.

INPUTS

EXTERNAL DIODES

CONNECTED HERE

ANALOG VOLTAGE OUTPUT, 4mV/k

1.8V REFERENCE OUTPUT

Figure 1. Proper Measurement Equipment Setup

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DEMO MANUAL DC1767

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

1 1 C1 CAP., X7R, 0.1μF, 10V 20% 0603 AVX, 0603ZC104MAT

2 1 C2 CAP., X7R, 470pF, 10V 10% 0603 AVX, 0603ZC471KAT2A

3 7 E1, E2, E3, E4, E5, E6, E7 TESTPOINT, TURRET, 0.094, PBF MILL- MAX, 2501-2-00-80-00-00-07-0

4 2 JP1, JP2 HEADER, 3 PIN 0.079 DUAL ROW SAMTEC, TMM-103-02-L-D

5 1 Q1 XISTOR MMBT3904 SOT-23 ON SEMI., MMBT3904LT1G

6 1 R1 RES., CHIP, 1k, 1/10W, 5% 0603 YAGEO, RC0603JR-071KL

7 1 U1 IC, LTC2997IDCB LINEAR TECH., LTC2997IDCB#TRPBF

8 2 XJ1, XJ2 SHUNT, 0.079" CENTER DEMO CIRCUIT 1767A

9 1 FAB, PRINTED CIRCUIT BD

10 2 STENCIL (TOP & BOTTOM) STENCIL DC1767A

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DEMO MANUAL DC1767

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 DC1767

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

LT 0811 • 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