DEMO MANUAL DC1333A LTC2640 Single 12-Bit SPI VOUT DAC with Internal Reference DESCRIPTION Demonstration circuit 1333A features the LTC(R)2640, a 12-bit SPI DAC. This device establishes a new benchmark for size and integration of 12-bit DACs and onboard reference. performance. After evaluating with Linear Technology's software, the digital signals can be connected to the end application's processor Design files for this circuit board are available at http://www.linear.com/demo/DC1333A The DC1333A may be connected directly to the target application's analog signals while using the DC590 USB serial controller board and supplied software to measure 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 LTC2640 VARIATION RESOLUTION (BITS) POWER-UP FULL-SCALE DC1333A-A LTC2640AITS8-LM12 12 Mid-Scale 2.5V DC1333A-B LTC2640AITS8-LZ12 12 Zero 2.5V DC1333A-C LTC2640AITS8-HM12 12 Mid-Scale 4.096V DC1333A-D LTC2640AITS8-HZ12 12 Zero 4.096V BOARD PHOTO RIBBON CABLE DAC CONNECTIONS TO DC590 CONTROLLER dc1333a F01 Figure 1. DC1333A Connection Diagram DC1333afa 1 DEMO MANUAL DC1333A QUICK START PROCEDURE 1. Connect the DC1333A 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 2 DC1333afa DEMO MANUAL DC1333A HARDWARE SETUP JUMPERS GROUNDING AND POWER CONNECTIONS _CLR/REF_SEL: On the B and D versions of the demo board, this is not populated. On the A and C versions of the demo board, this is used to determine the reference input. Power (VCC): Normally, the DC1334A 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. ANALOG CONNECTIONS DAC outputs are provided on the row of turret posts at the edge of the board. Grounding: Three ground posts are provided. DC1333afa 3 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 8 VCC 4 0 Leo Chen HELEN DATE 9/12/07 9/12/07 3 Tuesday, September 23, 2008 DESIGNER ENGINEER APPROVED CHECKED DRAWN APPROVALS CONTRACT NO. 2 * R3 OPT SDI SCK U1 * 2 VCC 5 8 _CLR/REF_SEL 1 _CS/LD 3 SDI 2 SCK LTC2640 TECHNOLOGY GND GND VOUT 2 FILENAME: DWG NO SHEET 1 1 DC1333A-A/B/C/D OF _CLR/REF_SEL E6 E5 E4 GND REF VCC 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 E7 VOUT 7 E3 E2 E1 1 LTC2640-LM12/LZ12/HM12/HZ12 Single 12/10/8-Bit SPI Vout DAC CAGE CODE SCALE: SIZE TITLE _CS/LD C1 0.1uF Figure 3. LTC2640 Schematic Diagram 4.99K NO LTC2640 - HZ12 -D NO JP1 LTC2640 - HM12 -C 4.99K NO LTC2640 - LZ12 -B NO R3 * A0 1 R4 4.99K 3 JP1 _CLR/REF_SEL 1 JP1 LTC2640 - LM12 -A JP1 4 GND 5 SDA A2 3 A1 2 WP 7 U2 24LC025-I/ST R1 R2 4.99K 4.99K 6 SCL LTC PART# C2 0.1uF U1 Assy Table NC 14 * GND 8 EESDA 9 EEGND 12 EEVCC 10 EESCL 11 MOSI/SDA 7 MISO 5 CS 6 SCK/SCL 4 VUNREG 1 5V 2 GND 3 D J1 13 GND HDR2X7-079-MOLEX Array EEPROM 4 3 1 REF 6 GND 4 4 5 1 REV A A B C D DEMO MANUAL DC1333A SCHEMATIC DIAGRAM DC1333afa DEMO MANUAL DC1333A REVISION HISTORY BOARD REV DATE DESCRIPTION A 04/16 Corrected Part #s PAGE NUMBER 1 Removed BOM DC1333afa 5 DEMO MANUAL DC1333A 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 6 DC1333afa Linear Technology Corporation LT 0416 REV A * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2013