DEMO MANUAL DC1332A LTC2631 Single 12-/10-/8-Bit I2C VOUT DACs with Integrated 10ppm/C Reference Description Demonstration circuit 1332A features the LTC(R)2631, a 12bit I2C DAC. This device establishes a new benchmark for size and integration of 12-bit DACs and onboard reference. software, the digital signals can be connected to the end application's processor/controller for development of the serial interface. 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 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. 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 Board Photo RIBBON CABLE DAC CONNECTIONS TO DC590 CONTROLLER I2C ADDRESS JUMPERS dc1332a F01 Figure 1. DC1332A Connection Diagram DC1332af 1 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 QuikEvalTM 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 theoretical 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 DC1332af 2 DEMO MANUAL DC1332A Hardware Setup Jumpers GROUNDING AND POWER CONNECTIONS CA0: This sets the I2C address of the LTC2631. These should be set to 1 (VCC) by default. 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. 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. Grounding: Three ground posts are provided. ANALOG CONNECTIONS DAC outputs are provided on the row of turret posts at the edge of the board. DC1332af 3 DEMO MANUAL DC1332A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER C1, C2 CAP., X7R, 0.1F, 16V, 10%, 0603 AVX, 0603YC104KAT DC1332A Required Circuit Components 1 2 2 1 J1 HEADER, 2x7 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 1 U1 IC, LTC2631HTS8-LM12#PBF, TSOT-23 LINEAR TECHNOLOGY, LTC2631HTS8-LM12#PBF 1 U1 IC, LTC2631HTS8-LZ12#PBF, TSOT-23 LINEAR TECHNOLOGY, LTC2631HTS8-LZ12#PBF 1 U1 IC, LTC2631HTS8-HM12#PBF, TSOT-23 LINEAR TECHNOLOGY, LTC2631HTS8-HM12#PBF 1 U1 IC, LTC2631HTS8-HZ12#PBF, TSOT-23 LINEAR TECHNOLOGY, LTC2631HTS8-HZ12#PBF DC1332A-A 5 DC1332A-B 5 DC1332A-C 5 DC1332A-D 5 DC1332af 4 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. A B C 5 NC 14 EESDA 9 EEGND 12 EEVCC 10 EESCL 11 MOSI/SDA 7 MISO 5 CS 6 SCK/SCL 4 VUNREG 1 5V 2 GND 8 D 4 CA1 JP1 2 1 0 Leo Chen 9/12/07 9/12/07 DATE 3 SCALE: SIZE 2 * TECHNOLOGY VOUT 7 REF 6 GND GND VOUT GND REF VCC 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 E6 E5 E4 E3 E2 E1 1 2 FILENAME: DWG NO SHEET 1 1 DC1332A-A/B/C/D OF 1 REV A LTC2631HTS8-LM12/LZ12/HM12/HZ12 Single 12/10/8-Bit I2C Vout DAC 8 CA1 1 CA0 3 SDA 2 SCL U1 LTC2631 CAGE CODE C1 0.1uF TITLE CA0 JP2 2 Tuesday, September 23, 2008 DESIGNER ENGINEER APPROVED CHECKED HELEN APPROVALS DRAWN SDA SCL Figure 3. LTC2631 Schematic Diagram 0 1 R3 4.99K CONTRACT NO. A0 1 A2 3 A1 2 WP 7 4 GND 5 SDA R1 R2 4.99K 4.99K 6 SCL * Assy Table C2 0.1uF U2 24LC025-I/ST 8 VCC Array J1 EEPROM 3 1 3 4 1 3 HDR2X7-079-MOLEX GND 3 VCC 5 4 GND 5 A B C D DEMO MANUAL DC1332A Schematic Diagram DC1332af 5 13 GND DEMO MANUAL DC1332A 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 (c) 2004, Linear Technology Corporation DC1332af 6 Linear Technology Corporation LT 0513 * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2013