DC890B

DEMO MANUAL DC890B DC890B QuickStart Guide DESCRIPTION Demonstration circuit DC890B along with PScope™ software provides a USB based Windows PC hosted digital data acquisition system supporting CMOS/LVDS output ADCs up to 250Msps. The DC890B must be powered from an external 6VDC ±0.5VDC power supply when operating in LVDS mode. When operating in CMOS mode, the external power supply is optional. The Linear Technology supplied PScope evaluation software automatically detects the DC890B and can also detect many of the standard ADC demonstration circuits boards. The DC890B will not enable LVDS mode unless an external 6.0VDC power source is available. This system provides for fast and easy performance evaluation of high speed ADCs. DC890B collects up to 256K word samples and then performs various analyses on the data including calculating SNR, SINAD, THD, SFDR and ENOB. The digitized input, an FFT of the collected data, the primitive wave of the sample set or an IFFT of modified frequency domain data is plotted to a display window to facilitate analyzing distortion products and sources. Figure 1 shows a picture of the DC890B. The DC890B is connected to the ADC demonstration circuit via a 100-pin edge connector, to the PC by a USB A-B cable and to an optional power supply either by a 5mm power plug or optionally by turrets. Figure 2 details the connections. 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. BOARD PHOTO Figure 1. DC890B Board dc890bf 1 DEMO MANUAL DC890B OPERATING PRINCIPLES The DC890B is capable of collecting a block of data samples from an ADC demonstration circuit initiated either by an internally generated trigger or an externally supplied 2.5V CMOS level trigger of user selected edge. The external trigger is TTL or CMOS compatible (the trigger line is diode clamped to the 2.5V Rail through a 475Ω resistor). Refer to the PScope software help for information on the various operating modes and options. The conversion clock to the DC890B is supplied via the ADC demonstration circuit either from an optional on board oscillator if installed or an external signal generator connected to the ADC demonstration circuit. QUICK START PROCEDURE To prevent damage to the DC890B, it is important to follow the equipment setup procedure outlined below: 1. Do not plug the DC890B 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 DC890B to the USB port and supply external power to the DC890B, if you will be using the LVDS mode. Do not use a USB cable longer than 2m or the board may not reset properly. (See note in Trouble Shooting section.) 5. Connect only 2.5V CMOS or LVDS output ADC demonstration circuits directly to the DC890B via the 100 pin edge connector. All Linear Technology DC890 compatible demo boards meet these requirements. Apply DC power to the ADC demonstration circuit. 6. Each ADC 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. Please refer to it for proper jumper settings, input power requirements and input signal levels and frequency ranges. 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. Select processing options (the hammer icon) menu and verify that under trigger mode, no trigger wait is selected 10. Enter the exact sample rate in MHz and select the sample size in the provided fields in PScope page 1. NOTE: Minimum sample rate in LVDS mode is 50Msps. 11. If the sampled signal is not coherent with the encode clock, select an appropriate windowing function from the pull down menu. 12. Initiate a data collection cycle by clicking the green collect button; it will turn red during the collection cycle. An FFT should appear on the screen along with a plot of the sampled data. Make sure the input level is not over ranging the ADC. See online help for specific guidance on using the PScope software. dc890bf 2 DEMO MANUAL DC890B QUICK START PROCEDURE EXT TRIGGER INPUT JTAG EXT 6VDC REQUIRED FOR LVDS. APPLY TO TURRET TP2 AND TP3 OR USE A 5mm POWER-PLUG 0R WALL TRANSFORMER DEMONSTRATION CIRCUIT CONNECTOR USB CONNECTOR Figure 2. DC890B Basic Connection Locations dc890bf 3 DEMO MANUAL DC890B 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 DC890B • In CMOS mode the DC890B can operate from the USB power, however in LVDS mode, the Spartan-III FPGA IO ring drivers draw considerable supply current to bias the active LVDS terminations. The DC890B has provisions for a 5mm power plug for an external 6V ±0.5V supply. The DC890B automatically detects the presence of external power and disables the USB power input. • X1: The DC890B has provisions for an external trigger input, edge selectable by software. This permits initiating data block capture by an external event. • J2: A JTAG connector is provided for downloading custom FPGA software to the board. Grounding pin 3 of J2 automatically puts the FPGA into JTAG program- ming mode. User developed code can be loaded into the FPGA without compromising the factory installed code. Jumper pins 4 and 6 of PIC programming connector J1 to disable the microcontroller when using custom FPGA code. Refer to the schematic for further details. This feature is provided due to customer requests. Development of custom code will not be supported by the factory. • J7 and J8 locations (not installed) provide access to six additional FPGA pins for test purposes. These pins also drive LED indicators useful for debug purposes. Xilinx provides logic analysis and data collection features through JTAG via ChipScope. dc890bf 4 DEMO MANUAL DC890B LED INDICATORS The DC890B provides system status via eight LEDs: LED-1. TRANSFER – Indicates a USB data transfer from the PScope to the PC is in progress. LED-2. SEEP – Indicates access of the optional demonstration circuit serial electrically erasable PROM on select demonstration boards. Information in this SEEP permits PScope software to configure the DC890B properly for the device under evaluation using the auto detect demo board feature in the configure/device menu. LED-3. RST – Indicates assertion of either a hard or soft reset. LED-4. DCM_RDY– In LVDS mode, LED 4 blinks to alert the user that the sample clock is either not present or outside the required frequency range (FIN must be > 50 MHz). A steady on condition indicates the digital clock module is locked to the input sample clock. In CMOS mode LED 4 functions as a poweron/FPGA programmed Indicator. LED-5. RUN ON TRIGGER – Indicates that the board is set to run on trigger (versus halt on trigger mode). LED-6. DATA_RDY – Indicates completion of data block acquisition. LED-7. RUN – Indicates the board is ARMED to collect a block of data. LED-8. TRIGGER – Indicates that a trigger was received and data collection has started. CIRCUIT DETAILS A schematic, parts list and parts placement drawings are attached to the end of this quick start guide for reference only. dc890bf 5 DEMO MANUAL DC890B TROUBLE SHOOTING GUIDE Problem: DC890B is plugged in, but PScope software still does not recognize DC890B board. 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 DC890B as an unknown device. If this is the case, the problem can be corrected by the following procedure: to reset the DC890B if the USB bus should hang. Refer to the appropriate demonstration circuit quick start guide for details. Problem: Collected data samples look like noise or appear corrupted. Solution: Make sure the proper device has been selected in the PScope software, the factory jumper settings are present and for LVDS output demo boards, external power is applied to the DC890B otherwise the captured data will not be properly interpreted. 1) Unplug the DC890B board from the USB port. Problem: PScope reports it cannot reset the DC890B. 2) Reinstall the PScope software. Carefully following the on-screen instructions. This may require a reboot of your computer. The on-screen instructions will inform you if that is the case. Solution: Make sure either a powered USB port is used or external power is supplied. DO NOT USE A USB CABLE LONGER THAN 2 METERS. The time delay of a longer USB cable may result in the DC890B intercepting the reset. 3) If the problem persists, please choose contact software support from the tools menu for assistance from LTC staff. Problem: USB Bus appears to be hung. Problem: Demonstration circuit software loads properly, but will not run or gives device not accessible errors. Solution: Verify the demonstration circuit is properly powered up and a correct (signal level and frequency) conversion clock is applied. (The DC890B can operate from the USB port power in CMOS mode but will not load the FPGA with the LVDS code unless external power is detected.) Set the correct sample rate for the applied conversion clock as PScope software uses the sample size and rate to determine the watch dog time out period Solution: As the DC890B is used in a lab environment where power may be inappropriately sequenced, cables unintentionally disconnected etc, some users have reportedly had their USB bus hang. This condition is easily rectified by right clicking properties under my computer ⇒ Hardware ⇒ Device Manager ⇒ and then right clicking on the appropriate USB bus controller and again selecting properties. The device status generally reports that it is working properly. Select the advanced tab. You will notice a refresh button. Device manager has queried the port, and as a result, reset the bus. dc890bf 6 DEMO MANUAL DC890B PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 1 3 C80, C81, C89 CAP, TANT, 470μF, 10V 20% 7343 AVX TPSE477M010R0050 2 0 C94 (OPTION) CAP, TANT, 470μF, 10V 20% 7343 AVX TPSE477M010R0050 3 0 C88 (OPTION) CAP, POLY-TA, 1000μF 4V 20% 7343 KEMET T530X108M004ASE006 4 1 C88 CAP, POLY-TA, 680μF 4V 20% 7343 KEMET T520D687M004ASE025 5 1 C36 CAP, 330μF 16V 20PCT NICHICON UPH1C331MPD6 6 9 C1 ,C2, C32, C35, C38, C76, C78, C79, C92 CAP, X5R 10μF 6.3V 20% 1206 TAIYO YUDEN JMK316BJ106ML-T 7 1 C82 CAP, TANT, 4.7μF, 10V 20% 3216 AVX TAJA475M010R 8 5 C8, C37, C60, C77, C91 CAP, X5R 1μF 10V 10% 0603 AVX 0603ZD105KAT 9 1 C83 CAP, X5R 0.22μF 16V 20% 0603 AVX 0603YD224MAT 10 15 C11, C12, C27 TO C31, C34, C42, C44, C52, C53, C57, C62, C85 CAP, X7R 0.1μF 16V 10% 0603 AVX 0603YC104KAT 11 43 C13 TO C26, C39, C40, C45 TO C50, CAP, X5R, 0.1μF, 10V 10% 0402 C54 TO C56, C58, C59, C61, C63 TO C75, C90, C93 AVX 0402ZD104KAT 12 1 C43 CAP, X7R 0.047μF 16V 10% 0603 AVX 0603YC473KAT 13 5 C4, C5, C33, C84, C87 CAP, X7R 0.01μF 16V 10% 0603 AVX 0603YC103KAT 14 1 C10 CAP, X7R 2200pF 25V 10% 0603 AVX 06033C222KAT2A 15 0 C9 (OPTION) CAP, X7R 2200pF 25V 10% 0603 AVX 06033C222KAT2A 16 1 C41 CAP, X7R 1000pF 25V 10% 0603 AVX 06033C102KAT2A 17 0 C86 (OPTION) CAP, X7R 1000pF 25V 10% 0603 AVX 06033C102KAT2A 18 1 C51 CAP, NPO, 100pF 25V 10% 0603 AVX 06033A101KAT2A 19 3 C3, C6, C7 CAP, NPO 22pF 50V 10% 0603 AVX 06035A220KAT 20 9 D1 TO D8, D12 LED, GRN 0603 LITE ON LTST-C190KGKT 21 1 D10 DIODE, DUAL SCHOTTKY, SOT23 DIODES INC BAT54S-7 22 2 D11, D13 RECTIFIER, GP 1A 50V SMA DIODE INC S1A -13 23 2 D9, D14 DIODE, GP 200V 200MA SOD323 DIODES INC BAV20WS 24 1 J1 HEADER, 3 × 2, 2mm COMM CON 2202S-06G2 26 1 J2 HEADER, 2 × 7, 2mm MOLEX 87831-1420 27 0 J3, J11 (OPTION) HEADER, 2 × 1, 2mm COMM CON 3201S-02G2 28 1 J4 HEADER, 3 × 1, 100MIL SAMTEC TSW-103-26-L-S 29 1 J5 CON, EDGE, 100PIN, 0.063 SAMTEC MEC8-150-02-L-D-EM2 30 1 J6 CON, USB-B, 4 PINS, SINGLE THR HOLE MILL-MAX 897-30-004-90-000 ALTERNATE 897-43-004-90-000000 31 1 J9 CONNECTOR, POWER 5mm CUI INC PJ-002A-SMT 32 0 J10 (OPTION) HEADER, 3 × 1, 2mm COMM CON 3201S-03G2 33 0 L1 CHOKE, COMMON MODE, QUAD, 5μH COILCRAFT TTDLF4500 34 1 L1 ALTERNATE CHOKE, COMMON MODE, QUAD, 5μH COILCRAFT PDLF4500 35 1 L2 IND, PWR, 2.2UH, D52LC TOKO D52LC #A914BYW-2R2M 36 0 L3 (OPTION) IND, PWR, 2.2UH, D52LC TOKO D52LC #A914BYW-2R2M 37 5 Q1, Q6, Q8, Q9, Q12 XSTR, NPN, SOT23 DIODES INC MMBT3904-7 38 2 Q7, Q13 XSTR, PNP, SOT23 DIODES INC MMBT3906-7 dc890bf 7 DEMO MANUAL DC890B PARTS LIST ITEM QTY 39 4 REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Q2, Q3, Q4, Q5 XSTR, MOSFET, SOT23 VISHAY SI2316DS -T1 Q2, Q3, Q4, Q5 ALTERNATE XSTR, MOSFET, SOT23 VISHAY SI2306BDS-T1-E3 DIODES INC SEMI 2N7002-7 40 2 Q10, Q11 XSTR, MOSFET, SOT23 41 1 R102 RES, 2.2MΩ 5% 1/16W 0603 AAC CR16-225JM 42 1 R92 RES, 422k 1% 1/16W 0603 AAC CR16-4223FM 43 1 R95 RES, 324k 1% 1/16W 0603 AAC CR16-3243FM 44 1 R93 RES, 200k 1% 1/16W 0603 AAC CR16-2003FM 45 5 R6, R17, R67, R68, R79 RES, 100k 1% 1/16W 0603 AAC CR16-1003FM 46 1 R94 RES, 16.2k 1% 1/16W 0603 AAC CR16-1622FM 47 1 R3 RES, 14k 1% 1/16W 0603 AAC CR16-1402FM 48 14 R4, R10, R15, R16, R46, R66, R71, R72, R73, R82, R84, R88, R91, R105 RES, 10k 1% 1/16W 0603 AAC CR16-1002FM 49 10 R61, R81, R83, R90, R96, R112 TO R115, R119 RES, 4.75k 1% 1/16W 0402 VISHAY CRCW04024751F 50 6 R21, R103, R104, R117, R118, R137 RES, 4.75k 1% 1/16W 0603 AAC CR16-4751FM 51 0 R77 (OPTION) RES, 4.75k 1% 1/16W 0603 AAC CR16-4751FM 52 4 R14, R48, R85, R89 RES, 2k 1% 1/16W 0603 AAC CR16-2001FM 53 1 R11 RES, 1.5k 1% 1/16W 0603 AAC CR16-1501FM 54 9 R8, R18, R40, R41, R44, R45, R78, R80, R106 RES, 1k 1% 1/16W 0603 AAC CR16-1001FM 55 0 R75, R107, R108 (OPTION) RES, 1k 1% 1/16W 0603 AAC CR16-1001FM 56 12 R9, R25 TO 32, R43, R110, R111 RES, 475Ω 1% 1/16W 0603 AAC CR16-4750FM 57 2 R47, R53 RES, 332Ω 1% 1/16W 0603 VISHAY CRCW06033320F 58 3 R74, R76, R138 RES, 332Ω 1% 1/16W 0402 AAC CR05-3320FM 59 5 R1, R2, R19, R38, R52 RES, 100Ω 1% 1/16W 0603 AAC CR16-1000FM 60 0 R120 TO R136 (OPTION) RES, 100Ω 1% 1/20W 0201 VISHAY CRCW0201-101J200RT7 61 17 R7, R20, R24, R54, R55 TO 60, R62 TO 65, R69, R70, R116 RES, 49.9Ω 1% 1/16 0402 AAC CR05-49R9FM 62 3 R34, R86, R87 RES, 33.2Ω 1% 1/16W 0603 AAC CR16-33R2FM 63 2 R12, R13 RES, 22.1Ω 1% 1/16W 0603 AAC CR16-22R1FM 64 4 R22, R23, R39, R51 RES, 10Ω 5% 1/16W 0603 AAC CR16-100JM 65 5 R97 TO R101 RES, 10Ω 1% 1/8W 1206 AAC CR18-10R0FM 66 1 R42 RES, 0Ω JUMPER 0402 VISHAY CRCW04020000ZSTDE 67 0 R50 (OPTION) RES, 0Ω JUMPER 0402 VISHAY CRCW04020000ZSTDE 68 1 R109 RES, 0Ω JUMPER 0805 AAC CJ10-000M 69 1 R49 RES, 0.1Ω 1% 1/8W 0805 VISHAY WSL0805R1000FEA 70 3 R5, R33, R37 RES, 49.9k 1% 1/16W 0603 AAC CR16-4992FM 71 2 R35, R36 RES 2×4 ARRAY, CHIP, 100Ω, ISO ROHM MNR14E0ABJ101 72 1 SW1 SWITCH, LIGHT TOUCH, 2 PINS PANASONIC EVQPPDA25 73 5 TP2 TO TP3, G2, G3, G5 TURRET MILL MAX 2308-2 dc890bf 8 DEMO MANUAL DC890B PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 74 0 TP1, G4, G6 (OPTION) 75 1 76 1 U17 IC, 93LC46BT-I/OT, SOT23-6 MICROCHIP 93LC46BT-I/OT U7 IC, FT245BM, LQFP32 (2rs., PbF) FUTURE TECH (FTDICHIP) FT245BM 77 1 U10 IDT71T75602S200PF IDT71T75602S200PF 78 0 U10 (OPTION) 71V2556S200PF 71V2556S200PF 79 1 U19 IC, LT1529CQ-5 LINEAR TECHNOLOGY LT1529CQ-5 80 1 U4 IC, LT1763CS8 LINEAR TECHNOLOGY LT1763CS8 81 1 U8 IC, LT1763CS8-3.3 LINEAR TECHNOLOGY LT1763CS8-3.3 82 1 U5 IC, LTC1726EMS8-2.5 LINEAR TECHNOLOGY LTC1726EMS8-2.5 83 2 U3, U14 IC, LTC1844ES5-3.3 LINEAR TECHNOLOGY LTC1844ES5-3.3 84 1 U21 IC, LDO,1.5A, DD-5(Q PKG) LINEAR TECHNOLOGY LT1963EQ-2.5 85 1 U1 IC, LTC2921CGN-3.3 LINEAR TECHNOLOGY LTC2921CGN-3.3 86 1 U16 IC, LTC4210-1CS6 LINEAR TECHNOLOGY LTC4210-1CS6 87 1 U15 IC, LTC4300A-1CMS8 LINEAR TECHNOLOGY LTC4300A-1CMS8 88 1 U12 IC, LTC4410ES6 LINEAR TECHNOLOGY LTC4410ES6 89 1 U2 IC, OSC, SOT23-5 LINEAR TECHNOLOGY LTC6905CS5-96 90 1 U11 IC, NC7SP17P5X FAIRCHILD, NC7SP17P5X 91 1 U18 IC, FF, DUAL, HC, TSSOP14 PHILIPS, 74HC74PW 92 1 U6 IC, PIC16LF877A-I/PT MICROCHIP, PIC16LF877A-I/PT 93 1 U9 IC, XC3S200-4PQ208 XILINX, XC3S200-4PQ208C 94 1 U13 IC, SEEPROM, 4M, SO8 ST MICRO, M25P40-VMN6TP 95 1 U20 IC, SWREG, SYNC, BUCK LINEAR LTC3411EMS 96 1 X1 CONN, BNC 50Ω CONNEX 112404 97 1 Y1 CRYSTAL, 10MHz, HC49-SMT ECS INC. ECS-100-18-5P 98 4 STAND OFF, 1/4 × 4 TO 40 MICRO PLASTICS 14HTSP101 99 4 SCREW, 4 TO 40 - 1/4" SCREW 4-40X1/4PAN PH SS PS 100 0 HEATSINK, BGA (FOR U9) AAVID/THERMALLOY 374324B00035 dc890bf 9 DEMO MANUAL DC890B SCHEMATIC DIAGRAM dc890bf 10 DEMO MANUAL DC890B SCHEMATIC DIAGRAM dc890bf 11 DEMO MANUAL DC890B SCHEMATIC DIAGRAM dc890bf 12 DEMO MANUAL DC890B SCHEMATIC DIAGRAM dc890bf 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. 13 DEMO MANUAL DC890B 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 dc890bf 14 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 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc.: DC890B