DEMO MANUAL DC718 Quick Start Guide for DC718 DESCRIPTION PScope™ software along with demonstration circuit DC718 provides a USB based Windows PC hosted digital data acquisition system supporting CMOS/LVTTL output ADCs up to 135Msps. The DC718 can be powered from either the USB port or from an external 6VDC to 9VDC power supply (for lower noise operation). The Linear Technology supplied PScope evaluation software automatically detects the DC718 and in select cases can also detect the ADC demonstration circuit under evaluation. This system provides for fast and easy performance evaluation of high speed ADCs by collecting up to 128k word samples and then performing various analyses on the data including calculating SNR, SINAD, THD, SFDR, ENOB and displaying the digitized input, an FFT of the data, the primitive wave of the sample set or a IFFT of modified frequency domain data to facilitate analyzing distortion products and sources. Figure 1 shows a block diagram of the DC718. The DC718 is connected to the ADC demonstration circuit via a 40-pin edge connector, to the PC by a USB A-B cable and to an optional power supply by a 5mm plug. 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 PScope is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. DATA SRAM TRIGGER INPUT DATA J7 SAMPLE CLOCK SIGNAL INPUT DEMONSTRATION CIRCUIT CONV CLK OF DATA FLAG BUS CPLD USB CONTROLLER POWER USB ADDRESS 8-BIT DATA BUS PIC_CLK CNTL_DATA DATA_RDY MICROPROCESSOR STATUS INDICATORS TRANSFER RST SEEP OVERFLOW RUN PWR ON DATA_RDY TRIGGER POWER SUPPLY OPTIONAL EXT 6VDC TO 9VDC DC718 F01 Figure 1. DC718 Block Diagram dc718f 1 DEMO MANUAL DC718 OPERATING PRINCIPLES The DC718 is capable of collecting a block of data samples from an ADC demonstration circuit initiated either by an internal generated trigger or an externally supplied trigger of user-selected polarity. The external trigger is TTL or 3.3V CMOS compatible. Refer to the PScope software help for information on the various operating modes and options. The conversion clock to the DC718 is supplied via the ADC demonstration circuit either from an optional on board oscillator or an external signal generator connected to the ADC demonstration circuit. QUICK START PROCEDURE To prevent damage to the DC718, it is important to follow the equipment setup procedure outlined below: 1. Do not plug the DC718 into the PC USB port before running the installation program. 2. Download the PScope installation program from http:// www.linear.com/software/. 3. Run the PScope installation program and follow the on-screen instructions. NOTE: The PScope evaluation software requires a PC running Windows98, 2000, XP, or later, with an available USB port. 4. Connect the DC718 to the USB port and supply external power to the DC718, if desired. 6. Apply power to the ADC demonstration circuit. 7. Apply an appropriate conversion clock and analog input signal to the ADC demonstration board. 8. ADC board will be automatically detected and configured. 9. Enter the sample rate and select the sample size in the provided fields in PScope. 10. Initiate a data collection cycle via the evaluation software. See online help for specific guidance on using the PScope software. 11. Each demonstration board also comes with a quick start guide similar to this one and should be referred to for specific usage details relevant to the demonstration circuit being evaluated. 5. Connect the ADC demonstration circuit to the DC718 via the 40-pin edge connector. EXT TRIGGER INPUT DC718 EXT 6VDC TO 9VDC USB CONNECTOR DEMONSTRATION CIRCUIT Figure 2. Basic Connection Locations dc718f 2 DEMO MANUAL DC718 USEFUL SOFTWARE TOOLS The PScope software includes tools for automatic software updates and for quickly retrieving documentation from the world wide web. To update the PScope software (requires an internet connection): NOTE: Adobe Acrobat reader is required to view the documents and is available at http://www.adobe.com. This automatically updates the main program and drivers for individual demo circuits. • Choose Update Program from the tools menu. OPTIONAL CONNECTIONS TO THE DC718 In most cases the DC718 can operate from the USB power except were very high speed operation exceeds the power limits of the USB port or extremely noise sensitive measurements require laboratory grade power. Adding a ferrite common mode filter to the USB cable may reduce noise in these cases. The DC718 provides a connector for a 5mm power plug at 6V to 9V. Inserting this connector into the 5mm power jack automatically disconnects USB power from the board. The DC718 has provisions for an external trigger input, polarity selectable by software. This permits initiating data block capture by an external event. Do not connect anything to J1, J2, J3 or SV1. J4 is an I2C port. J8 is a test port for CPLD software development and is not populated. dc718f 3 DEMO MANUAL DC718 LED INDICATORS The DC718 provides system status via 8 LEDs: LED-1. TRANSFER – Indicates a data transfer from the PScope to the PC. LED-2. SEEP – Indicates presence/access of the optional demonstration circuit serial electrically erasable PROM on select demonstration boards permitting PScope software to automatically identify the device being evaluated. LED-5. OVERFLOW – Indicates an overflow occurred during the last block acquisition. LED-6. D_RDY – Indicates completion of data block acquisition. LED-7. RUN – Indicates the board is ARMED to collect a block of data. LED-8. TRIG – Indicates that a trigger was received and data collection has started. LED-3. RST – Indicates assertion of either a hard or soft reset. LED-4. POWER – Power on indicator. CIRCUIT DETAILS A schematic is attached to the end of this quick start guide for reference only. TROUBLE SHOOTING GUIDE Problem: DC718 is plugged in, but PScope software still does not recognize DC718 board. Problem: Demonstration circuit software loads properly, but will not run or gives device not accessible errors. Solution: Assuming that the USB hardware in your computer is operational (try verifying an operational USB port with another USB device such as a USB Memory stick, printer or scanner if available.), the likely cause is improper installation of the USB drivers, which results in Windows recognizing the DC718 as an unknown device. If this is the case, the problem can be corrected by the following procedure: Solution: Verify that the demonstration circuit is properly powered up and that a correct (signal level and frequency) conversion clock is applied. (The DC718 is powered from the USB port. If an external USB port expansion unit which does not provide power is used to connect the DC718 to the PC, an external 6V to 9V must be provided to the DC718.) Set the sample rate for the applied conversion clock as PScope software uses the sample size and rate to determine the time out period for resetting the DC718 if the USB should hang. Refer to the appropriate demonstration circuit quick start guide for details. 1) Unplug the DC718 board from the USB port. 2) Reinstall the PScope Software. Carefully following the on-screen instructions. This may require a reboot of your computer. The in-screen instructions will inform you if that is the case. 3) If the problem persists, please choose contact software support from the tools menu for assistance from the LTC staff. Problem: Collected data samples look like noise or appear corrupted. Solution: Make sure the proper device has been selected in the PScope software otherwise the captured data will not be properly interpreted. dc718f 4 DEMO MANUAL DC718 PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER TAIYO YUDEN LMK316B7225KL-T 1 2 C32, C35 CAP, X7R 2.2μF 10V 10% 1206 2 2 C39, C41 CAP, X5R 10μF 6.3V 20% 1206 TAIYO YUDEN JMK316BJ106ML-T 3 4 C33, C38, C40, C62 CAP, X7R 0.01μF 16V 10% 0603 AVX 0603YC103KAT 4 1 C36 CAP, 330μF 16V 20PCT NICHICON UPL1C331MPH6 5 1 C37 CAP, X5R 1μF 16V 20% 1206 TAIYO YUDEN EMK316BJ105MF-T 6 1 C44 CAP, X7R 1000pF 25V 10% 0603 AVX 06033C102KAT2A 7 38 C3, C4, C11 TO C31, C34, C45 TO C50, C52 TO C59 CAP, X7R 0.1μF 16V 10% 0603 AVX 0603YC104KAT 8 1 C51 CAP, X7R, 100pF 25V 10% 0603 AVX 06033C101KAT 9 2 C1, C2 CAP, NPO 22pF 50V 10% 0603 AVX 06035A220KAT 10 2 C8, C60 CAP, X5R 0.47μF 16V 20% 0603 AVX 0603YD474MAT 11 2 C9, C10 CAP, X7R 2200pF 25V 10% 0603 AVX 06033C222KAT2A 12 1 D10 DIODE, BAT54S SCHOTTKY SOT23 DIODES INC BAT54S 13 8 D1 TO D8 LED, GRN 0603 LITE ON LTST-C190KGKT 14 1 D9 DIODE, BAT54WS SCHOTTKY SOD323 DIODES INC BAT54WS-7 15 5 G1 TO G3, G5, G7 TURRET MILL MAX 2308-2 16 1 J1 HEADER, 3×2, 2mm COMM CON 2202S-06G2 17 1 J2 HEADER, 2×7, 2mm MOLEX, 87331-1420 18 1 J6 CON, USB-B, 4 PINS, SINGLE THR. HOLE MILL-MAX, 897-30-004-90-000 19 1 J7 CONNECTOR, 20×2, 0.100 COMM CON 1116-40-G2 20 1 J9 CONNECTOR, POWER 5mm CUI INC PJ-002A-SMT 21 1 L1 CHOKE, COMMON MODE, QUAD, 5μH COILCRAFT TTDLF4500 22 1 Q1 XSTR, NPN,GP, SOT23 DIODES INC MMBT3904 23 1 Q2 XSTR, MOSFET, 8-PIN MSOP ZETEX ZXM64P02XTA 24 6 R7, R15, R16, R46, R51, R53 RES, 10k 1% 1/16W 0603 AAC CR16-1002FM 25 2 R11, R52 RES, 1.5k 1% 1/16W 0603 AAC CR16-1501FM 26 3 R12, R13, R23 RES, 22.1Ω 1% 1/16W 0603 AAC CR16-22R1FM 27 2 R14, R50 RES, 2.21k 1% 1/16W 0603 AAC CR16-2211FM 28 1 R18 RES, 47.5k 1% 1/16W 0603 AAC CR16-4752FM 29 1 R47 RES, 100Ω 1% 1/16W 0603 AAC CR16-1000FM 30 2 R20, R24 RES, 49.9Ω 1% 1/16W 0603 AAC CR16-49R9FM 31 1 R3 RES, 66.5k 1% 1/16W 0603 AAC CR16-6652FM 32 3 R33, R42, R49 RES, 33.2Ω 1% 1/16W 0603 AAC CR16-33R2FM 33 2 R35, R36 RES 2×4 ARRAY, CHIP, 100Ω, ISO ROHM MNR14E0ABJ101 34 5 R37, TO R41 RES 2×4 ARRAY, CHIP, 33Ω, ISO ROHM MNR14E0ABJ330 35 3 R4, R19, R21 RES, 4.75k 1% 1/16W 0603 AAC CR16-4751FM 36 1 R43 RES, 499Ω 1% 1/16W 0603 AAC CR16-4990FM 37 1 R5 RES, 33.2k 1% 1/16W 0603 AAC CR16-3322FM 38 3 R6, R17, R22 RES, 100k 1% 1/16W 0603 AAC CR16-1003FM 39 3 R44, R45, R48 RES, 1.00k 1% 1/16W 0603 AAC CR16-1001FM 40 10 R9 TO R10, R25 TO R32 RES, 475Ω 1% 1/16W 0603 AAC CR16-4750FM dc718f 5 DEMO MANUAL DC718 PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 41 1 SW1 SWITCH, LIGHT TOUCH, 2 PINS PANASONIC, EVQPPDA25 42 1 X1 CONN, BNC 50Ω CONNEX 112404 43 1 U10 IC, EEPROM,1k, MICROWIRE, SOT6 MICROCHIP, 93C46BT-I/OT 44 1 U14 IC, VREG, LIN, 5V LINEAR TECHNOLOGY LT1129CQ-5 45 2 U11, U12 IC, ANALOG SW, SPST, DUAL FAIRCHILD NC7WB66K8X 46 1 U1 IC, CPLD, 256 MACROCELL,TQPF144 XILINX XC2C256-6TQG144C 47 1 U6 IC, MICROCNTLR, 4KFLASH, 192RAM MICROPCHIP PIC16F73-I/SS 48 1 U4 IC, SI-OSC, 96/48/24MHZ, SOT5 LINEAR TECHNOLOGY LTC6905IS5-96#PBF 49 1 U13 IC, SI-OSC, ADJ, SOT5 LINEAR TECHNOLOGY LTC1799IS5#PBF 49a 1 U2 IC, SYNC-SRAM, 18X256K IDT, IDT71V3558S166PF 50 0 U2 (ALTERNATE PART NUMBER) IC, SYNC-SRAM, 18X512K IDT, IDT71V65803S150PF 51 1 U7 IC, USB CNTLR, LQFP32 FUTURE TECH, (FTDICHIP) FT245BM 52 1 U5 IC, VMONITOR, TRIPLE, 5V/3.3V/ADJ LINEAR TECHNOLOGY LTC1726EMS8-5#PBF 53 1 U9 IC, VREG, LIN, 1.8V, MS8 LINEAR TECHNOLOGY LT1962EMS8-1.8#PBF 54 1 U8 IC, VREG, LIN, 3.3V, SO8 LINEAR TECHNOLOGY LT1763CS8-3.3#PBF 55 1 U3 IC, VREG, LIN, 3.3V, SOT5 LINEAR TECHNOLOGY LTC1844ES5-3.3#PBF 56 4 STAND OFF, 1/4 × 4-40 MICROPLASTIC 57 4 SCREW, 4-40- 1/4" SCREW 58 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT #718C2 59 2 STENCIL STENCIL #718C2 dc718f 6 DEMO MANUAL DC718 SCHEMATIC DIAGRAM dc718f 7 DEMO MANUAL DC718 SCHEMATIC DIAGRAM dc718f 8 DEMO MANUAL DC718 SCHEMATIC DIAGRAM dc718f 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. 9 DEMO MANUAL DC718 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 dc718f 10 Linear Technology Corporation LT 0612 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2012