DEMO MANUAL DC1337A LTC2309 8-Channel, 12-Bit SAR ADC with I2C Interface Description Demonstration circuit 1337A features the LTC(R)2309, a low noise, low power, 8-channel, 12-bit, successive approximation ADC with an I2C compatible serial interface. The LTC2309 is available in a 24-pin 4mm x 4mm QFN package. DC1337A demonstrates the DC performance of the LTC2309 in conjunction with the DC590 or DC2026 data collection boards (QuikEvalTM controller). Alternatively, by connecting the DC1337 into a customer application the performance of the LTC2309 can be evaluated directly in that circuit. Design files for this circuit board are available at http://www.linear.com/demo/DC1337A 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 DC590 OR DC2026 INPUTS 0V TO REFCOMP Figure 1. DC1337A Connection Diagram dc1337af 1 DEMO MANUAL DC1337A Quick Start Procedure Connect the DC1337 to a QuikEval controller using the supplied 14-conductor ribbon cable. Make sure the VCCIO jumper of the QuikEval controller is in the 5V position. Connect the QuikEval controller to a host PC with a standard USB A/B cable. Apply an analog input voltage to CH0-CH7 on connector J1. Run the evaluation software supplied with the QuikEval controller or download it from www.linear.com/software. The correct control panel will be loaded automatically. Click the Collect (Figure 2) button to begin reading CH0-CH3. Press the Page 1 Button to toggle to Page 2. This displays CH4-CH7. This button toggles between the two displays. The Help menu contains information on data logging the ADC results. The Tools menu has the data logging option as well as options for changing the number of points displayed, the number of points in an average and whether the data is displayed in LSBs or Volts. The View menu can be used to access the LTC2309 product page. If the QuikEval program is started without the demo board attached to the QuikEval controller, the Tools menu can be used to check for updates and automatically install them. DC1337 requires at least version K71 of the QuikEval software. Hardware Setup Signal Connections Turrets J1 Connector for CH0-CH7, COM and BIAS/2. Limit input voltage swings to GND-VDD. For optimum performance, the input should be bandlimited to the frequencies of interest. EXT_BIAS External Bias connection. This can be used to drive the BIAS/2 line through a 2:1 divider. To use this pin put jumper J6 in the EXT position and apply desired bias voltage. Jumper J2 AD0 I2C address line. Set to GND for operation with supplied software. For operation without QuikEval, configure as desired: Low (GND), High (5V) or Float (FLT) 5V 5V supply line for the DC1337. Use this line only if the QuikEval controller is not used Jumper J3 AD1 I2C address line. Set to GND for operation with supplied software. For operation without QuikEval, configure as desired: Low (GND), High (5V) or Float (FLT) GND Ground line for the DC1337 Jumper J4 COM Common pin for single ended ADC conversions. Can be set to GND or left floating (FLT) so that COM can be driven by J1. SCL I2C clock line. Controlled by the QuikEval controller if connected. J5 QuikEval interface connector. Provides power and I2C interface to the DC1337. Jumper J6 BIAS Selects between REFCOMP and an external bias voltage to drive the Bias/2 line. Bias/2 is designed to set a center point for the minus input during bipolar operation. 2 SDA I2C bidirectional data line. Controlled by the QuikEval controller if connected. VREF Connected to ADC VREF pin. REFCOMP Connected to ADC REFCOMP pin. BIAS/2 Bias Voltage/2 (REFCOMP or EXT) dc1337af DEMO MANUAL DC1337A Hardware Setup Using the DC1337 without the QuikEval Controller Interface signals SDA and SCL and power are normally provided to the DC1337 by the QuikEval controller. If you use this board without the QuikEval controller, it is the user's responsibility to connect a 5V power supply and ground as well as generating SDA and SCL. These signals can be provided through the 14-pin ribbon cable connector. See schematic for pinout. See the LTC2309 data sheet for information on driving SDA and SCL. Figure 2. DC1337A QuikEval Screenshot dc1337af 3 DEMO MANUAL DC1337A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 1 3 C1, C15, C16 CAP., 10F, X5R, 6.3V, 20%, 0603 MURATA, GRM188R60J106ME47D AVX, 06036D106MAT2A NIC, NMC0603X5R106M6.3TRPF TDK, C1608X5R0J106M080AB 2 4 C2, C3 , C4, C18 CAP., 0.1F, X7R, 25V, 10%, 0603 AVX, 06033C104KAT2A TDK, C1608X7R1E104K080AA 3 9 C5, C6, C7, C8, C9, C10, C11, C12, C13 CAP.,47pF, C0G, 25V, 10%, 0603 AVX, 06033A470KAT2A 4 1 C14 CAP., 2.2F, X5R, 6.3V, 10%, 0603 TAIYO YUDEN, JMK107BJ225KA-T AVX, 06036D225KAT2A MURATA, GRM188R60J225KE19D 5 1 C17 CAP., 1F, X7R, 16V, 10%, 0603 TDK, C1608X7R1C105K080AC AVX, 0603YC105KAT2A NIC, NMC0603X7R105K16TRPF 6 8 E1, E2, E3, E4, E5, E6, E7, E8 TEST POINT, TURRET, 0.064", MTG. HOLE MILL-MAX, 2308-2-00-80-00-00-07-0 7 1 J1 CONN., HDR., MALE, 2x10, 2.54mm, THT, STRT SAMTEC, TSW-110-07-L-D 8 2 J2, J3 CONN., HDR., MALE, 1x4, 2.54mm, THT, STRT SAMTEC, TSW-104-07-L-S 9 2 J6, J4 CONN., HDR., MALE, 1x3, 2.54mm, THT, STRT SAMTEC, TSW-103-07-L-S 10 1 J5 CONN., HDR., MALE, 2x7, 2mm, THT, VERT, SHROUDED MOLEX, 87831-1420 11 9 R1, R2, R3, R4, R5, R6, R7, R8, R9 RES., 100, 1%, 1/10W, 0603 VISHAY, CRCW0603100RFKEA NIC, NRC06F1000TRF 12 1 R10 RES., 49.9, 1%, 1/10W, 0603 VISHAY, CRCW060349R9FKEA PANASONIC, ERJ3EKF49R9V 13 5 R11, R12, R13, R14, R15 RES., 4.99k, 1%, 1/10W, 0603 VISHAY, CRCW06034K99FKEA NIC, NRC06F4991TRF 14 1 U1 IC, 5V, 8-CH, 12-Bit I2C SAR ADC , QFN-24UF LINEAR TECH., LTC2309CUF#PBF 15 1 U2 IC, MEMORY, EEPROM, 2K-Bit, 400kHz, TSSOP-8 MICROCHIP, 24LC025-I/ST 16 4 JP2, JP3, JP4, JP6 CONN., SHUNT, FEMALE, 2 POS, 2.54mm SAMTEC, SNT-100-BK-G 17 1 PCB, DC1337A DEMO CIRCUIT 1337A 18 1 STENCIL STENCIL 1337A 4 dc1337af 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 12 14 16 18 11 13 15 17 BIAS/2 EXT_BIAS E8 10 9 20 8 7 19 6 5 2 4 E6 J1 3 1 E2 5 R9 R7 R5 R3 R1 100 100 100 100 100 R8 R6 R4 R2 100 100 100 100 C10 47pF 47pF 47pF 47pF C9 C6 C5 47pF C11 4 47pF C7 47pF C12 47pF C8 47pF 2 J4 CH0 CH1 CH2 CH3 CH4 CH5 CH6 CH7 COM C13 22 23 24 1 2 3 4 5 6 1uF C17 GND FLT COM 10uF C15 10uF 0.1uF C4 5V C1 3 C2 1 1% 4.99K R12 1% 4.99K R11 J6 REFCOMP BIAS EXT 3 9 GND 5V 11 E1 5V 5V 0.1uF 18 5V 19 12 8 3 20 13 25 D 4 AD1 SCL 0.1uF Tuesday, July 12, 2016 DESIGNER ENGINEER APPROVED CHECKED mi APPROVALS DRAWN R10 5V 09/24/07 DATE FFGND 2 A0 A1 A2 WP SCL SDA 1% 4.99K R15 TECHNOLOGY 5 24LC025-I/ST U2 GND 5V FLT AD1 DATE 14 12 9 10 11 5 7 4 6 2 1 E4 E3 NC EEGND EESDA EEVCC EESCL MISO MOSI/SDA SCK/SCL CS 5V SCALE: FILENAME: SIZE CAGE CODE DWG NO 1 SHEET DC1337A 1 OF 1 1 REV SCL SDA APPROVED VUNREG J5 09/25/07 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 5V 1 SCH, LTC2309CUF, 8-CH LOW NOISE I2C ADC 1 2 3 7 6 REFCOMP VREF GND 3 5V TITLE 1% 1% J3 2 R14 E7 E5 5V PROTO 1 REVISION HISTORY DESCRIPTION REV FLT AD0 ECO 4.99K 3 2 J2 2 4.99K R13 49.9 1% CONTRACT NO. 10uF C16 C18 14 2.2uF C14 AD0 15 16 17 LTC2309CUF U1 0.1uF SDA C3 7 5 1 3 1 4 21 10 2 1 4 8 GND VCC GND GND GND 4 GND GND GND PAD GND VDD GND 3 VDD GND VREF REFCOMP 8 VDD 13 This circuit is proprietary to Linear Technology and supplied for use with Linear Technology parts. Customer Notice: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 Applications Engineering for assistance. A B C D DEMO MANUAL DC1337A Schematic Diagram N S D . 1 A 7 3 3 1 dc1337af 5 DEMO MANUAL DC1337A 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 dc1337af Linear Technology Corporation LT 0816 * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com (c) LINEAR TECHNOLOGY CORPORATION 2016