DC1767A - Demo Manual

DEMO MANUAL DC1767
LTC2997
Remote/Internal
Temperature Sensor
DESCRIPTION
Demonstration circuit 1767 features the LTC®2997, a high
accuracy, analog output, temperature sensor.
Design files for this circuit board are available at
http://www.linear.com/demo
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.
QUICK START PROCEDURE
Jumper Settings
VCC: Connect a 2.25V to 5.5V power supply to this turret.
D+/D–: These jumpers select which temperature input connects 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).
D+/D–: Should be set to EXT. This is where the external
diode should be connected.
Analog Connections
Analog signal connections are made via the row of turret
posts along the edges of the board.
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.
GND: (2 turrets) These turrets connect directly to the
internal ground planes.
1.8V REFERENCE OUTPUT
INPUTS
EXTERNAL DIODES
CONNECTED HERE
ANALOG VOLTAGE OUTPUT, 4mV/k
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
SCHEMATIC DIAGRAM
dc1767f
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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DEMO MANUAL DC1767
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 application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
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Linear Technology Corporation
LT 0811 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2011
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