Linear Technology LTC2634 Manuel utilisateur
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not Verical, and is provided strictly 'as is.' Verical, its subsidiaries, affiliates, employees, and agents make no representations or warranties
regarding the attached document and disclaim any liability for the consequences of relying on the information therein. All referenced brands,
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DC1488A-A
ANALOG DEVICES
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1
dc1488af
DEMO MANUAL DC1488A
DESCRIPTION
LTC2634
Quad 12-Bit SPI VOUT DAC
with Internal Reference
Demonstration circuit 1488A features the LTC
®
2634 quad
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/MICROWIRE 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
ANALOG
OUTPUTS
TO DC590
DEMOBOARD TYPE LTC2634 VARIATION POWER UP FULL SCALE
DC1488A-A LZ Zero 2.5V
DC1488A-B LMI Mid-Scale 2.5V
DC1488A-C HZ Zero 4.096V
DC1488A-D HMI Mid-Scale 4.096V
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dc1488af
DEMO MANUAL DC1488A
QUICK START PROCEDURE HARDWARE SETUP
Connect DC1488A 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 evalu-
ation software supplied with DC590 or download it from
www.linear.com. The correct control panel will be loaded
automatically. To update DAC values, enter new value in
corresponding output text box and press enter. Be sure
the DAC is enabled.
Complete software documentation is available from the
Help menu item, as features may be added periodically.
Analog Connections
DAC Outputs: The four DAC outputs from the LTC2634
are brought out to turrets labeled VOUTA through VOUTD.
These may be connected to external instruments or other
circuitry.
NOTE: DAC outputs are not in alphabetical order on the
circuit board.
VREF: The REF turret is connected directly to the reference
terminals of the LTC2634. When the integrated reference
is being 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 QuikEval™ software.
Grounding And Power Connections
Power(VCC):NormallyDC1488AispoweredbytheDC590
controller. VCC can be supplied to this turret, however the
power supply on DC590 must be disabled! Refer to the
DC590 Quick Start Guide for more details on this mode
of operation.
Grounding: Ground turrets as well as 2 grounding strips
are provided.
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
1 3 C1, C3, C4 CAP., X7R, 0.1μF, 16V, 10%, 0603 AVX, 0603YC104KAT
2 1 C2 CAP., X5R, 10μF, 6.3V, 20%, 0603 AVX, 06036D106MAT
3 10 E1-E10 TESTPOINT, TURRET, 0.095" MILL-MAX, 2501-2-00-80-00-00-07-0
4 1 JP1 0.1" SINGLE ROW HEADER, 3-PIN SAMTEC, TSW-103-07-L-S
5 1 JP1 SHUNT, 0.1" BLK SAMTEC, SNT-100-BK-G
6 1 J1 HEADER, 2X7PIN, 0.079CC MOLEX, 87831-1420
7 2 R1, R2 RES., CHIP, 10k, 1/16W, 1%, 0603 VISHAY, CRCW060310K0FKEA
8 2 R3, R4 RES., CHIP, 4.99k, 1/16W, 1%, 0603 VISHAY, CRCW06034K99FKEA
9 1 U2 IC, 24LC025-I/ST, TSSOP MICROCHIP, 24LC025-I/ST
PARTS LIST
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dc1488af
DEMO MANUAL DC1488A
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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dc1488af
DEMO MANUAL DC1488A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2011
LT 0411 • 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
Copyright © 2004, Linear Technology Corporation
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