DEMO MANUAL DC1338A LTC2990 I2C Temperature Voltage and Current Monitor DESCRIPTION Demonstration circuit 1338A features the LTC®2990, a high performance temperature, voltage and current monitor that uses I2C for communication. It offers submillivolt resolution and 1% current and 1°C temperature measurement accuracy. DC1338A is a member of Linear Technology’s QuikEval™ family of demonstration boards. It is designed to allow easy evaluation of the LTC2990 and 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. Exposed ground planes allow proper grounding to prototype circuitry. After evaluating with Linear Technology’s software, the I2C lines 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 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. INPUTS RIBBON CABLE TO DC590 CONTROLLER Figure 1. Proper Measurement Equipment Setup. Power Is Obtained from DC590 dc1338af 1 DEMO MANUAL DC1338A QUICK START PROCEDURE Connect DC1338A to a DC590 USB serial controller using the supplied 14 conductor ribbon cable. Connect DC590 to host PC with a standard USB A/B cable. Run the evaluation software supplied with DC590 or downloaded from http://www.linear.com/software. The correct program will be loaded automatically. Click the COLLECT button to start reading the input voltage (COLLECT button becomes PAUSE after collection has been initiated). Details on software features are documented in the control panel’s help menu. Figure 2. Software Screenshot dc1338af 2 DEMO MANUAL DC1338A HARDWARE SETUP Connection to DC590 Serial Controller J1 is the power and digital interface connector. Connect to DC590 serial controller with supplied 14 conductor ribbon cable. Jumper Settings V1, V2, V3, V4: These jumpers can be toggled between VOLT and TEMP. VOLT connects the corresponding input on the LTC2990 with the corresponding turret for an external input. TEMP connects the corresponding input to the onboard FMMT3904 (V3 and V4) or the FMMT3906 (V1 and V2). Please note that the jumpers should be moved in pairs, V1 and V2 should both be connected either to VOLT or TEMP and V3 and V4 should also be both connected to either VOLT or TEMP. Once set, the proper selection should also be made inside the QuikEval software in the mode box to reflect any changes made. VCC: EXT allows the LTC2990 to be powered from an external supply of 2.9V to 5.5V, connected to the VCC EXT and GND turrets. If set to INT, the LTC2990 is powered by the attached DC590B. ADR0, ADR1: These jumpers are used to select the I2C address for the LTC2990. When used with QuikEval, the correct address should also be selected from within the software. Analog Connections Analog signal connections are made at turrets V1, V2, V3 and V4. Single-ended input range is 0 to VCC, differential is ±300mV with a common mode range of 0 to VCC. When connecting the board to an existing circuit the exposed ground planes along the edges of the board may be used to form a solid connection between grounds. GND (2 locations): This turret is connected directly to the internal ground planes. VCC EXT: This turret allows the user to provide VCC to the LTC2990. (2.9V to 5.5V) V1, V2, V3, V4: These turrets are used to provide input voltage to the monitor when the corresponding jumpers are set to the VOLT position. V+: Unregulated 10V coming from the DC590B. Turret provided for testing purposes only. Presence of 10V indicates proper connection of DC590B. dc1338af 3 DEMO MANUAL DC1338A PARTS LIST ITEM QUANTITY REFERENCE DESIGNATOR DESCRIPTION MANUFACTURER’S PART NUMBER Required Circuit Components: 1 2 C2, C1 CAP, X7R 0.1µF 25V 10% AVX, 06033C104KAT2A 2 2 C4, C3 CAP, NPO 470pF 25V 10% AVX, 06033A471KAT2A 3 8 E1, E2, E3, E4, E5, E6, E7, E8 TURRET, TESTPOINT MILL MAX, 2308-2-00-80-00-00-07-0 4 7 JP1, JP2, JP3, JP4, JP5, JP6, JP7 HEADERS, 3 PINS 2mm CTRS SAMTEC, TMM-103-02-L-S 5 1 J1 HEADERS, 14PIN 2mm CTRS MOLEX, 87831-1420 6 1 Q1 TRANSISTOR, PNP ZETEX, FMMT3906 7 1 Q2 TRANSISTOR, NPN ZETEX, FMMT3904 8 2 R1, R2 RES, CHIP 4.99k 0.06W 1% VISHAY, CRCW04024K99FKED 9 1 U1 IC, TEMP, VOLT, CURR MONITOR LINEAR TECHNOLOGY, LTC2990CMS 10 1 U2 IC, SERIAL EEPROM MICROCHIP, 24LC025-I/ST 11 7 XJP1, XJP2 ,XJP3, XJP4, XJP5 TO XJP7 SHUNT, 2mm CTRS SAMTEC, 2SN-BK-G dc1338af 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 D E8 GND E7 V4 E6 V3 E5 V2 E4 V1 5 5 VOLT TEMP VOLT TEMP VOLT TEMP VOLT TEMP JP7 V4 JP6 V3 JP5 V2 JP3 V1 3 2 1 3 2 1 3 2 1 3 2 1 C4 470pF C3 470pF 4 Q2 FMMT3904 Q1 FMMT3906 4 GND VCC ADR1 ADR0 SCL SDA 5 10 9 8 R1 8 1 4 3 0.1uF 3 Leo C. 4.99K 1% 4.99K 1% R2 SDA SCL WP VCC 0.1uF C2 A2 A1 A0 4 3 2 2 1 14 J1 DATE TECHNOLOGY VSS 5 6 7 13 12 11 EESCL EEGND 10 9 8 7 EEVCC EESDA SCK/SCL 2 6 U2 24LC025-I/ST E3 V+ E2 GND 1 E1 VCC EXT VUNREG +5V 1 APPROVED 7 C1 SCL SDA TP1 TP2 DESCRIPTION REVISION HISTORY 5 3 2 2 6 V4 V3 V2 V1 JP4 JP2 3 INT 1 3 ADR0 1 JP1 VCC 2 EXT 2 ADR1 1 REV ECO 4 3 2 1 0 1 0 1 3 A B C D DEMO MANUAL DC1338A SCHEMATIC DIAGRAM dc1338af 5 DEMO MANUAL DC1338A 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 © 2004, Linear Technology Corporation dc1338af 6 Linear Technology Corporation LT 1110 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2010