DEMO MANUAL DC1529A LTC2657: 16-Bit Octal Rail-to-Rail DAC with I2C Interface Description Demonstration circuit 1529A features the LTC2657 Octal 16-bit DAC with 4LSB INL error. This device establishes a new board-density benchmark for 16-bit DACs and advances performance standards for output drive, crosstalk and load regulation in single supply, voltage-output multiple DACs. DC1529A has many features for evaluating the performance of the LTC2657. Design files for this circuit board are available at http://www.linear.com/demo/DC1529A L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TO DC590 DEMO BOARD TYPE LTC2657 VARIATION FULL SCALE DC1529A-A LTC2657BCUFD-L16 2.5V DC1529A-B LTC2657BCUFD-H16 4.096V dc1529afa 1 DEMO MANUAL DC1529A Quick Start Procedure Connect DC1529A 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 evaluation software supplied with DC590 or download it from www.linear.com/software. The correct control panel will be loaded automatically. If an external reference is used, click the "External" button in the control panel and enter the reference voltage in the text block. Complete software documentation is available from the Help menu item, as features may be added periodically. dc1529afa 2 DEMO MANUAL DC1529A Hardware Setup Jumpers JP1: VREF Select. Either an Internal or External reference can be selected. To drive through the VREF pin, set to External and connect a clean reference voltage to the VREF turret. Default is the internal reference. JP2: Power-Up Mode. The LTC2657 can be set to either power-up in mid-scale or zero-scale. Default is zero-scale. JP3, JP4, JP5: I2C Address Selection Jumpers. Set address here and double check that the address selected in software matches. By default all jumpers are tied to GND. Analog Connections DAC Outputs: The eight DAC outputs from the LTC2657 are brought out to turrets labeled VOUTA through VOUTH. These may be connected to external instruments or other circuitry. terminals of the LTC2657. When the onboard reference is being used, the reference voltage may be monitored at this point. An external reference may also be applied to this turret after setting JP1 to External. Grounding and Power Connections Power (VCC): Normally DC1529A is powered by the DC590 controller. VCC can be supplied to this turret, however the power supply on DC590 must be disabled! Refer to DC590 Quick Start Guide for more details on this mode of operation. Grounding: There is one common ground plane on the board. All GND pins on the LTC2657 are tied to this ground plane through low impedance paths. Use the GND turrets as a reference point for measurements and connections to external circuits.Two bare ground strips are provided on the top and the bottom of the demo board. Note: DAC outputs are not in alphabetical order on the circuit board. VREF: The VREF turret is connected directly to the reference dc1529afa 3 DEMO MANUAL DC1529A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components 1 3 C6, C7, C8 CAP., CHIP X7R 0.1F 16V 0603 AVX, 0603YC104MAT1A 2 0 C1, C4 (Opt.) CAP., CHIP X7R 0.1F 16V 0603 AVX, 0603YC104MAT1A 3 0 C2 (Opt.) CAP., CHIP X5R 4.7F 6.3V 0805 TAIYO YUDEN, JMK212BJ475MG 4 0 C3, C5 (Opt.) CAP., CHIP X5R 10F 6.3V 0805 TDK, C2012X5R0J106M 5 15 E1-E15 TURRET, TESTPOINT 0.064" MILL-MAX, 2308-2 6 0 PAD1, PAD2 Opt. 7 3 JP3-JP5 HEADER, 3-PIN 1 ROW 0.079CC SAMTEC, TMM-103-02-L-S 8 1 JP2 HEADER, 2-PIN 2 ROW 0.079CC SAMTEC, TMM-102-02-L-D 9 1 JP1 HEADER, 2-PIN 4 ROW 0.079CC SAMTEC, TMM-104-02-L-D 10 5 FOR (JP1-JP5) SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G 11 1 J1 HEADER, VERTICAL DUAL 2X7 0.079CC MOLEX, 87831-1420 12 3 R1-R3 RES., CHIP 4.99K 1% 0603 VISHAY, CRCW06034K99FKEA 13 0 U1 (Opt.) I.C., MICROPOWER SOT-23 LOW DROPOUT LINEAR TECH., LT1790ACS6 14 0 U2 (Opt.) I.C., PRECISION REFERENCE LINEAR TECH., LT1236ACS8-5 15 1 U4 I.C., SERIAL EEPROM, TSSOP-8 MICROCHIP, 24LC025-I/ST I.C., LTC2657BCUFD-L16, UFD-20 LINEAR TECH., LTC2657BCUFD-L16# I.C., LTC2657BCUFD-H16, UFD-20 LINEAR TECH., LTC2657BCUFD-H16# DC1529A-A Required Circuit Components 16 1 U3 DC1529A-B Required Circuit Components 16 1 U3 dc1529afa 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. D C B 1 NOTES: C3 10uF 6.3V (Opt.) SCK CS 5V V+ NC EEGND EESCL EESDA EEVCC MISO 14 12 11 9 10 5 7 4 6 2 1 2 C4 0.1uF (Opt.) SDA/MOSI J1 HD2X7 V+ GND GND 1 VCC 2 E6 E4 E2 6 R2 4.99K VOUT C8 0.1uF V+ VIN U2 LT1236ACS8-5 (Opt.) 2 GND 4 R3 4.99K VCC V+ GND C5 10uF 6.3V (Opt.) C2 4.7uF 6.3V (Opt.) 3 8 6 4 2 5 6 7 8 SDA SCL WP VCC A2 A1 A0 pad2 VSS U4 24LC025 SDA 4 3 2 1 9 8 VREF E1 pad1 C6 0.1uF 7 5 3 1 SCL Ext1 Ext2 External Internal JP1 VREF VCC 4 SDA SCL 3 1 R1 4.99K Mid Scale Zero Scale 4 2 JP2 PORSEL VCC C7 0.1uF 5 Exposed Pad Solder Side VCC VOUTH VOUTG VOUTF VOUTE VOUTD VOUTC VOUTB VOUTA U3 LTC2657CUFD-16 16 15 14 13 4 3 1 20 5 Linear Technology Has Made A Best Effort To Design A Circuit That Meets Customer-Supplied Specifications; However, It Remains The Customer's Responsibility To Verify Proper And Reliable Operation In The Actual Application. Component Substitution And Printed Circuit Board Layout May Significantly Affect Circuit Performance Or Reliability. Contact Linear Technology Applications Engineering For Assistance. This Circuit Is Proprietary To Linear Technology And Supplied For Use With Linear Technology Parts. Customer Notice 6 6 VCC JP3 CA0 LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY 2 6 5 REFCOMP VO 6 LDAC REFIN/OUT VI GND 18 4 19 U1 LT1790ACS6 (Opt.) 3 12 PORSEL REFLO 2 17 VCC GND 21 GND 1 2 3 A GND 3 11 CA0 GND VCC JP4 CA1 VCC 7 E14 E13 E12 E11 E10 E9 E8 E7 E5 E3 E15 JP5 CA2 GND VOUTH VOUTG VOUTF VOUTE VOUTD VOUTC VOUTB VOUTA GND LDAC Wednesday, April 22, 2009 Date: Sheet 1 Demo Circuit 1529A Document Number 7 8 8 of 1 Octal I2C 16-Bit Rail-to-Rail DACs with Integrated Reference www.linear.com Size TitleLTC2657CUFD-16, 1630 McCarthy Blvd. Milpitas, CA. 95035 Phone (408) 432-1900 Fax (408) 434-0507 Linear Technology Corporation 1 2 3 4 C1 0.1uF (Opt.) GND 8 7 CA1 V+ GND 13 10 CA2 GND 1 2 3 1 Rev. A D C B A DEMO MANUAL DC1529A Schematic Diagram dc1529afa 5 DEMO MANUAL DC1529A 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 dc1529afa 6 Linear Technology Corporation LT 1013 * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2010