DC2443 - Demo Manual

DEMO MANUAL DC2443
LT6375
Configurable High
Voltage Amplifier
DESCRIPTION
Demonstration Circuit 2443 is a Configurable High Voltage
Amplifier featuring the LT®6375.
This demo board translates a high common mode signal
to an output related to a low voltage reference level. The
demo circuit is equipped with jumpers to facilitate setting the pin-strapped internal divider ratio configuration.
The LT6375 is unique in that it may be powered from a
low voltage (down to 3.3V) while it accepts signals well
outside the supply range. This device is also unusual in
PERFORMANCE SUMMARY
that it can operate with high supply voltages (up to 50V).
Connection points are provided to wire the amplifier in
other configurations besides the simple translator.
The key performance characteristics of the LT6375 and
DC2443 are shown in the Performance Summary table.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2443
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.
Specifications are at TA = 25°C
SYMBOL
PARAMETER
CONDITIONS
MIN
VIN+, VIN–
Input Range
V+, V– = ±15V, VREF = 0
–270
V+, V–
Amplifier Supply Range (Total if Split Supplies)
3.3
TYP
5…24
V– + 0.35
VOUT
Output Signal
IOUT
Output Current Range
IS
Supply Current
IOUT = 0
BW
Small Signal –3dB Bandwidth
Divider Ratio = 25
±10
MAX
UNITS
270
V
50
V
V+ – 0.7
±25
385
300
V
mA
µA
kHz
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DEMO MANUAL DC2443
OPERATING PRINCIPLES
The LT6375 is an op amp that includes integrated precision resistors for providing many useful high accuracy
functions with minimal external components. As a default
on the demo circuit, the gain is 1.000 and includes pinstrappable common mode attenuations. Large vias and
some spare pads are also provided so that other more
specialized configurations can be evaluated, such as precision gain blocks or summing amplifiers. The demo circuit
also includes connector footprints for user-furnished BNC
connectors if cable connectivity is desired.
QUICK START PROCEDURE
Demonstration Circuit 2443 is easy to set up to evaluate the performance of the LT6375. Refer to Figure 1
for proper evaluation equipment setup and follow the
procedure below:
3.Connect a voltmeter or oscilloscope probe to the OUT
terminal, with the common connection or ground clip
tied to GND.
1.Place jumpers in the following positions:
Note: Generators will typically be referenced to earth
ground. An AC “cheater” plug may be needed so that
a deliberate offset can be introduced with another
power supply.
JP1 – JP4, JP6 – JP8 to the GND position
JP5 to the SPLIT position
2. With power off, connect the power supply positive to V+,
the supply negative to V– and the common to GND. The
supply should be preset in the range of ±1.7V to ±25V.
2
4.Connect a signal source to the IN+ and IN–.
5. Turn on the power supplies.
6. Check for an output voltage that is a replica of the
input source.
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DEMO MANUAL DC2443
QUICK START PROCEDURE
dc2443a F01
Figure 1. Proper Evaluation Equipment Setup
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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 DC2443
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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dc2443f
Linear Technology Corporation
LT 1015 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2015
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