DEMO MANUAL DC1488A
LTC2634
Quad 12-Bit SPI V
OUT
DAC
with Internal Reference
DESCRIPTION
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.
Design files for this circuit board are available at
http://www.linear.com/demo
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.
TO DC590
ANALOG
OUTPUTS
DEMOBOARD TYPE
DC1488A-A
DC1488A-B
DC1488A-C
DC1488A-D
LTC2634 VARIATION
LZ
LMI
HZ
HMI
POWER UP
Zero
Mid-Scale
Zero
Mid-Scale
FULL SCALE
2.5V
2.5V
4.096V
4.096V
dc1488af
1
DEMO MANUAL DC1488A
QUICK START PROCEDURE
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.
HARDWARE SETUP
Analog Connections
DAC Outputs: The four DAC outputs from the LTC2634
are brought out to turrets labeled V
OUTA
through V
OUTD
.
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): Normally DC1488A is powered by the DC590
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.
PARTS LIST
ITEM
1
2
3
4
5
6
7
8
9
QTY
3
1
10
1
1
1
2
2
1
REFERENCE
C1, C3, C4
C2
E1-E10
JP1
JP1
J1
R1, R2
R3, R4
U2
PART DESCRIPTION
CAP X7R, 0.1μF 16V, 10%, 0603
.,
,
CAP X5R, 10μF 6.3V, 20%, 0603
.,
,
TESTPOINT, TURRET, 0.095"
0.1" SINGLE ROW HEADER, 3-PIN
SHUNT, 0.1" BLK
HEADER, 2X7PIN, 0.079CC
RES., CHIP 10k, 1/16W, 1%, 0603
,
RES., CHIP 4.99k, 1/16W, 1%, 0603
,
IC, 24LC025-I/ST, TSSOP
MANUFACTURER/PART NUMBER
AVX, 0603YC104KAT
AVX, 06036D106MAT
MILL-MAX, 2501-2-00-80-00-00-07-0
SAMTEC, TSW-103-07-L-S
SAMTEC, SNT-100-BK-G
MOLEX, 87831-1420
VISHAY, CRCW060310K0FKEA
VISHAY, CRCW06034K99FKEA
MICROCHIP 24LC025-I/ST
,
dc1488af
2
DEMO MANUAL DC1488A
SCHEMATIC DIAGRAM
dc1488af
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.
3
DEMO MANUAL DC1488A
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
dc1488af
4
Linear Technology Corporation
(408) 432-1900
●
LT 0411 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
FAX: (408) 434-0507
●
www.linear.com
©
LINEAR TECHNOLOGY CORPORATION 2011
京公网安备 11010802033920号
EEWORLD
