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DC1332af
DEMO MANUAL DC1332A
Description
LTC2631
Single 12-/10-/8-Bit I2C
VOUT DACs with Integrated
10ppm/°C Reference
Demonstration circuit 1332A features the LT C
®
2631, a 12-
bit I2C DAC. This device establishes a new benchmark for
size and integration of 12-bit DACs and onboard reference.
The DC1332A may be connected directly to the target
application’s analog signals while using the DC590 USB
serial controller board and supplied software to measure
performance. After evaluating with Linear Technology’s
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.
BoarD photo
software, the digital signals can be connected to the end
application’s processor/controller for development of the
serial interface.
Design files for this circuit board are available at
http://www.linear.com/demo
Figure 1. DC1332A Connection Diagram
DAC
CONNECTIONS
I2C ADDRESS JUMPERS
RIBBON CABLE
TO DC590
CONTROLLER
dc1332a F01
Demo BoarD Variations
DEMO BOARD TYPE LTC2631 VARIATION RESOLUTION (BITS) POWER-UP FULL-SCALE
DC1332A-A LTC2631-LM12 12 Mid-Scale 2.5V
DC1332A-B LTC2631-LZ12 12 Zero 2.5V
DC1332A-C LTC2631-HM12 12 Mid-Scale 4.096V
DC1332A-D LTC2631-HZ12 12 Zero 4.096V
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DC1332af
DEMO MANUAL DC1332A
Quick start proceDure
1. Connect the DC1332A to a DC590 USB serial controller
using the supplied 14-conductor ribbon cable.
2. Connect the DC590 to the host PC with a standard
USB A/B cable.
3. Run the QuikEval™ evaluation software supplied
with the DC590 or download it from:
www.linear.com/software. The correct program will
be loaded automatically.
Options are available to display the DAC output in voltage,
hex code, or decimal count. Additionally, the reference
voltage may be changed to reflect an actual measured
value, such that the output voltage matches the theoreti-
cal output voltage. The reference mode may be changed
from internal reference to external reference.
Features may be periodically added to the software. See
the software’s help menu for the latest information.
Figure 2. QuikEval Software
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DC1332af
DEMO MANUAL DC1332A
harDware setup
JUMPERS
CA0: This sets the I2C address of the LTC2631. These
should be set to 1 (VCC) by default.
CA1/REF_SEL: On the B and D versions of the demo board,
this is used to determine the I2C address of the LTC2631.
On the A and C versions of the demo board, this is used
to determine the reference input.
ANALOG CONNECTIONS
DAC outputs are provided on the row of turret posts at
the edge of the board.
GROUNDING AND POWER CONNECTIONS
Power (VCC): Normally, the DC1332A is powered by the
DC590 controller. VCC can be supplied to the 5V turret,
however the power supply on the DC590 must be disabled!
Refer to the DC590 Quick Start Guide for more details on
this mode of operation.
Grounding: Three ground posts are provided.
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DC1332af
DEMO MANUAL DC1332A
parts List
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
DC1332A Required Circuit Components
1 2 C1, C2 CAP., X7R, 0.1µF, 16V, 10%, 0603 AVX, 0603YC104KAT
2 1 J1 HEADER, 2×7 PIN, 0.079" MOLEX, 87831-1420
3 3 R1, R2, R3 RES., CHIP, 4.99k, 1/16W, 1%, 0603 VISHAY, CRCW06034K99FKEA
4 1 U2 IC, 24LC025ST, TSSOP MICROCHIP, 24LC025-I/ST
Hardware: For Demo Board Only
1 6 E1-E6 TESTPOINT, TURRET, 0.095" MILL-MAX, 2501-2-00-80-00-00-07-0
2 2 JP1, JP2 0.1" SINGLE ROW HEADER, 3-PIN SAMTEC, TSW-103-07-L-S
3 2 JP1, JP2 SHUNT, 1" BLK SAMTEC, SNT-100-BK-G
DC1332A-A
5 1 U1 IC, LTC2631HTS8-LM12#PBF, TSOT-23 LINEAR TECHNOLOGY, LTC2631HTS8-LM12#PBF
DC1332A-B
5 1 U1 IC, LTC2631HTS8-LZ12#PBF, TSOT-23 LINEAR TECHNOLOGY, LTC2631HTS8-LZ12#PBF
DC1332A-C
5 1 U1 IC, LTC2631HTS8-HM12#PBF, TSOT-23 LINEAR TECHNOLOGY, LTC2631HTS8-HM12#PBF
DC1332A-D
5 1 U1 IC, LTC2631HTS8-HZ12#PBF, TSOT-23 LINEAR TECHNOLOGY, LTC2631HTS8-HZ12#PBF
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DC1332af
DEMO MANUAL DC1332A
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.
Figure 3. LTC2631 Schematic Diagram
schematic Diagram
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
HDR2X7-079-MOLEX
CA1
0
1
CA0
0
1
*
Assy Table
*
A
DC1332A-A/B/C/D
Tuesday, September 23, 2008
11
HELEN 9/12/07
Leo Chen 9/12/07
Single 12/10/8-Bit I2C Vout DAC
LTC2631HTS8-LM12/LZ12/HM12/HZ12
SIZE
SCALE:
CAGE CODE DWG NO REV
SHEET OF
FILENAME:
TITLE
CONTRACT NO.
APPROVALS DATE
DRAWN
CHECKED
APPROVED
ENGINEER
DESIGNER
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
C2
0.1uF
SDA
J1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VUNREG
5V
GND
SCK/SCL
MISO
CS
MOSI/SDA
GND
EESDA
EEVCC
EESCL
EEGND
GND
NC
JP1
1
2
3
R3
4.99K
R1
4.99K
R2
4.99K
E3 GND
E1 VCC
E5 GND
U1
LTC2631
1
3
2
7
4
6
8
5
CA0
SDA
SCL
VOUT
GND
REF
CA1
VCC
E6 GND
E2 REF
JP2
1
2
3
C1
0.1uF
SCL
Array
EEPROM
U2 24LC025-I/ST
5
6
7
4
8
3
2
1
SDA
SCL
WP
GND
VCC
A2
A1
A0
E4 VOUT
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DC1332af
DEMO MANUAL DC1332A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LINEAR TECHNOLOGY CORPORATION 2013
LT 0513 • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LT C ) 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 LT C 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 LT C 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. LT C assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LT C 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 LT C applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
