Linear Technology LTC6655 Kurzanleitung zur Einrichtung
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dc2095af
DEMO MANUAL DC2095A
DESCRIPTION
LTC6655
0.25ppm Noise, Low Drift
Precision Reference
Demonstration circuit 2095A features the LTC
®
6655, a
precision low drift reference packaged in a hermetic LS8.
Thedemonstrationcircuitisavailablewiththe2.5V,4.096V
or 5V output voltage option parts.
Thedemoboardcircuitshowstheoptimallayoutfor overall
reference performance. The LTC6655 has a maximum
drift of 2ppm/°C and an initial accuracy of ±0.025%. The
hermetic package further improves the Long Term Drift
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.
PERFORMANCE SUMMARY
performance of the reference to 20ppm/√kHr. Another
benefit of the hermetic package is improved humidity
performance. Testing has shown that humidity can cause
the PCB to deform and stress the package. To reduce this
effect the ground plane is removed directly under the
reference. Doing this reduces output voltage shift as a
result of humidity to less than 10ppm.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2095A
Specifications are at TA= 25°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Range VOUT + 0.5 13 V
VOUT Output Voltage Accuracy –0.025 +0.025 %
Long-Term Drift of Output Voltage 20 ppm/√kHr
IQSupply Current 5 mA
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DEMO MANUAL DC2095A
With the demonstration circuit, it is easy to set up and
evaluatetheperformanceoftheLTC6655. Referto Figure1
for proper measurement equipment setup and follow the
procedure below:
1. With the power off, connect the power supply positive
to VIN and the common to GND. With default settings,
the supply can range from VOUT +0.5V to 13V.
2. Connect a DVM to the VOUT turret with the common
connection connected to ground.
3. Turn on power supply and confirm reference operation.
Figure 1. Test Setup
2.500V
3.00V
QUICK START PROCEDURE
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dc2095af
DEMO MANUAL DC2095A
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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TECHNOLOGY
TECHNOLOGY
TECHNOLOGY
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dc2095af
DEMO MANUAL DC2095A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com
LINEAR TECHNOLOGY CORPORATION 2015
LT 0315 • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
Thisdemonstration board (DEMO BOARD) kit beingsoldor provided by Linear Technology isintendedfor 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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