QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 590 USB SERIAL CONTROLLER FOR LINEAR TECHNOLOGY QUICKEVAL™ DEMO BOARDS DESCRIPTION Demonstration circuit 590 is a USB-based digital controller with generic Serial Peripheral Interface (SPI) and Inter Integrated Circuit (I2C™) ports. It is designed to mate with Linear Technology’s family of QuickEval™ demonstration boards. The demo board is fully isolated from the host PC’s ground, and in many cases no external power source is required. The evaluation software automatically detects which demo board is connected and loads the appropriate control screen. Figure 1 shows a block diagram of DC590. Power and digital signal connections are made via a 14-conductor ribbon cable. In many cases the controller can provide power for the demonstration circuit as well as digital signals. The demonstration circuit connections are fully isolated from the host PC’s ground (earth ground.) Four of the fourteen ribbon-cable conductors are referred to earth ground. Thus the isolation barrier is not designed to withstand large potential differences. This system facilitates quick performance evaluation of a variety of products, including ADCs, DACs, SMBus power control products, and others. QuickEval is a trademark of Linear Technology Corporation; I C is a trademark of Philips Electronics N.V.; Adobe is a trademark of Adobe Systems, Inc. 2 DATA ISOLATION (AGILENT HCPL-2300) USB PORT DATA I/O USB TO I2C/SPI CONTROLLER v+ POWER MANAGEMENT AUXILIARY BOARD ID LINES 14-PIN CONNECTOR 4 LT1761 vcc 5V EXTERNAL POWER SWITCHER SHUTDOWN (JP1) GND Figure 1. Block Diagram of Demonstration Circuit 590 1 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 590 USB SERIAL CONTROLLER FOR LINEAR TECHNOLOGY QUICKEVAL™ DEMO BOARDS Figure 2. Basic Connection QUICK START PROCEDURE For proper equipment setup, follow the procedure below: 1. Do not plug in DC590 before running the installation program. 2. Download the QuickEval installation program from http://www.linear.com/software/. 3. Run the QuickEval installation program and follow the on-screen instructions. NOTE: The QuickEval demo software requires a PC that is running Windows 98 (or later), and has an available USB port. 4. Connect the demonstration circuit to be evaluated to DC590 using the supplied 14-conductor ribbon cable. The demo software detects the circuit and starts the appropriate control screen. Each demonstration board also comes with a Quick Start guide similar to this one. For usage details relevant to a particular circuit refer to its Quick Start Guide. 2 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 590 USB SERIAL CONTROLLER FOR LINEAR TECHNOLOGY QUICKEVAL™ DEMO BOARDS USEFUL SOFTWARE TOOLS The QuickEval Demo software includes tools for automatic software updates and for quickly retrieving relevant documentation from the World Wide Web. The Download Datasheets feature is particularly useful to laptop users, who can use this feature to download the data sheets and Quick Start guides in one step, thus making them available even when the laptop is not connected to the internet. NOTE: Adobe Acrobat reader is required to view the documents and is available at http://www.adobe.com. To use the tools: Quit the demonstration circuit software or disconnect the USB cable. The main control panel appears. To update the software (requires internet connection): Choose Update from the Tools menu. This automatically updates the main program and drivers for individual demo circuits. To view the Quick Start Guide: Choose Quick Start Guide from the Tools menu. To retrieve data sheets (requires internet connection): Choose Download Datasheets from the Tools menu. All datasheets and Quick Start guides for all products in the QuickEval family are downloaded to the QuickEval program folder and placed in the dsheets folder. OPTIONAL CONNECTIONS TO THE DC590 In most cases DC590 and the demonstration circuit under evaluation can operate from available USB power, and thus require nothing more than a USB connection to the host PC and a ribbon connecting DC590 to the demo circuit under evaluation. Figure 2 shows this basic connection. DC590 offers several other power options, described below. Isolated supply options An external power supply is recommended to reduce the load on the host computer’s USB port, especially in the event of faults or short circuits. An LT1425 switching power supply provides isolated power to the demonstration circuit under evaluation and to the isolation circuitry. The LT1425 switching power supply is enabled by default but may be disabled by moving jumper JP1 (ISOL PWR) to the OFF position. This allows the isolated side 3 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 590 USB SERIAL CONTROLLER FOR LINEAR TECHNOLOGY QUICKEVAL™ DEMO BOARDS of the board and the demonstration circuit under evaluation to be powered separately. This is recommended when testing precision components such as high resolution ADCs and DACs. Figure 3 shows how to connect an external supply to the isolated side of the controller and the board under evaluation. After disabling the switching supply, apply 7V–9V between the GND and V+ posts. These posts are the in, out, and ground terminals of an LT1761 LDO regulator. The demonstration circuit under evaluation may draw up to 100mA from VCC. 7V REGULATED SUPPLY DEMONSTRATION CIRCUIT UNDER EVALUATION USB CABLE TO HOST PC 14-CONDUCTOR RIBBON CABLE Figure 3. Connecting an external supply to the isolated side of the controller Another option is to supply power to the isolated side of the controller (see Figure 4) back through the board under evaluation. The LT1761 regulator is reverse-current protected. This allows any convenient 5V ±10% regu- lated supply to be used. In this case, the isolation circuitry on DC590 is also powered from this source. worst-case current draw by DC590 is 50mA. 5V REGULATED SUPPLY DEMONSTRATION CIRCUIT UNDER EVALUATION USB CABLE TO HOST PC 14-CONDUCTOR RIBBON CABLE Figure 4. Supplying power to the controller through the board under evaluation 4 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 590 USB SERIAL CONTROLLER FOR LINEAR TECHNOLOGY QUICKEVAL™ DEMO BOARDS LED INDICATORS Two LED indicators are provided. The “ISOL PWR” LED is lit when either the onboard switching power supply is running or external power is applied to the isolated side of the board. The “COMMAND” LED indicates that a command has been sent to the board by the host PC and is waiting to be executed. The LED may not appear to be blinking in some cases, as the duty cycle may be very short. CIRCUIT DETAILS Schematics for the isolated power supply and optical signal isolation are attached to the end of this Quick Start Guide. Example microcontroller code is devicespecific, and may be included in the Quick Start Guide for the demonstration circuit under evaluation. OPTICAL ISOLATION The optical isolation scheme based on the Agilent HCPL 2300 high speed opto isolator and is designed to allow bidirectional SPI and I2C communications. Isolation schemes that are designed for only SPI or I2C will differ slightly. Contact Linear Technology Applications Engineering for more information. SWITCHING POWER SUPPLY The onboard switching supply is based on the LT1425 flyback regulator. Feedback is taken from the primary side of T1, eliminating the need for optical feedback. T2 and C9 provide common mode filtering. Refer to the LT1425 data sheet for details of operation. TROUBLESHOOTING GUIDE Problem: DC590 is plugged in, but QuickEval screen still says “USB Serial Controller Not Connected” Solution: The most likely cause is improper installation of the USB drivers, which causes Windows to recognize DC590 as an “Unknown Device.” Open the Windows Control Panel, open “System” and click the “Device manager” tab. Open the “Other Devices” item and look for USB SERIAL CONTROLLER. Select this item and click the remove button. Unplug DC590, Re-install the QuickEval software, and follow the on-screen instructions. Solution: Verify that the demo board is properly powered up. This Quick Start Guide lists the basic power connections to DC590. Some demo boards may have additional requirements; refer to the demo board’s Quick Start guide for details. Problem: After connecting the demo board to DC590 with the supplied 14 pin ribbon cable, QuickEval software still displays “Evaluation Board is not Connected.” Solution: Contact Linear Technology Applications Engineering. Problem: Demo board software loads properly, but will not run or gives “Device Not accessible” errors. 5 4 3 VCC D R6 20K R13 2K ISO_PWR_SHDN/ C1 220PF ON 2 R4 75 1 OFF C7 R7 1000PF 3.01K 1 GND 2 NC 3 4 RFB ROCOMP 14 VC RCCOMP 13 5 RREF 6 SYNC 7 SGND PGND 10 GND 9 GND 8 3 C6 220PF U2 C + - E4 VIN 3 2 3 1 1 1 C2 2.2,16V 1206 2 VIN 12 VSW 11 2 2 3 T2 CTX8-1P 4 3 C3 4.7,16V 1206 C8 0.1 IN VCCA OUT 5 GND BYP 4 SHDN LT1761ES5-5 C5 2.2,16V 1206 E1 5V R2 1.5K ISOL PWR R5 100K LED1 LN1351C GREEN E2 GND ISOLATED SECTION U3 LT1129CST-5 4 D6 ZHCS1000 1 3 VIN 1 IN C10 0.1 B VCC GND OUT 3 GND C11 22,6.3V 1210 2 PLACE CLOSE TO LT1425CS NOTES: UNLESS OTHERWISE SPECIFIED 7-12V USBVCC U4 1 VIN SENSE 6 2 GND GATE 5 3 CTL STAT 4 LTC4412ES6 Q1 FDN306P VCC 2 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. USBVCC 2. INSTALL SHUNT ON JP1 PIN 2 AND 3. 3 CONTRACT NO. APPROVALS DRAWN: A TECHNOLOGY KIM T. CHECKED: TITLE: APPROVED: ENGINEER: MARK T. DESIGNER: SIZE A DATE: 5 C4 OPT R8 15K C9 0.1,50V 0805 R9 10K E5 GND U1 D C 1 B ISO_PWR GND 16 SHDN 15 LT1425CS J1 CUI, PJ-002A WALL ADAPTER INPUT 1 E3 7V 1 3 T1 CTX02-13483 4 R3 17.8K 1 1 R1 75 D1 ZHCS1000 VCC JP1 ISOL PWR 2 2 5 4 3 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only USB SERIAL CONTROLLER DWG NO. REV DC590A-1 A Wednesday, December 18, 2002 SHEET 1 1 OF 3 A 5 4 3 R22 VCCA 2K 2 U8 ISOLATED SECTION 8 VCC 7 RL 6 VOUT CATHODE 3 GND NC 4 5 D VCC R23 4.99K,1% SCK R24 4.99K,1% D NOTES: UNLESS OTHERWISE SPECIFIED R25 OPT EESDA ISO_PWR R26 VCCA 4.99K,1% VCCA 1 2 2 3 3 4 4 ISO_SCL 5 5 ISO_MISO 6 6 ISO_CS/ 7 7 ISO_SDA/MOSI 8 8 VCC 9 9 10 10 11 11 12 12 13 13 14 14 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. U9 J4 C NC 1 ANODE 2 HCPL-2300 EESCK 1 1 8 VCC 7 RL 6 VOUT CATHODE 3 GND NC 4 5 NC 1 ANODE 2 VCC R27 4.99K,1% CS/ VCC VCC C17 0.1 HCPL-2300 R28 OPT C18 0.1 C MOSI R29 OPT EESDA VCCA U10 EESCK VCCA R30 R31 49.9K 49.9K 1% 1% R32 169 R35 2K 8 VCC 7 RL 6 VOUT CATHODE 3 GND NC 4 5 NC 1 ANODE 2 VCC R33 4.99K,1% D3 BAT54A 3 4 V+ 1 5 OUT +IN 3 V- 2 6 SHDN -IN 1 VCCA R39 11.5K TP1 R42 1K 3 2 1 U12 VCCA U13 D4 BAT54A V- V+ 4 OUT 5 2 -IN SHDN 6 1 +IN VCCA 1 3 R40 4.99K,1% LT1719CS6 VCC VCC 8 RL 7 NC 2 ANODE 3 CATHODE VOUT 6 NC GND 5 4 R34 11.5K TP2 R36 1K LT1719CS6 R37 OPT B VCC 2 HCPL-2300 HD2X7-079-MOLEX U11 VCC SPI_I2C/ VCC B R38 2K R41 169 SDA HCPL-2300 R43 OPT MISO VCCA VCCA VCCA VCCA VCCA C19 0.1 C20 0.1 C21 0.1 C22 0.1 C23 0.1 VCCA A 1 1 JP6 OPT 1 JP7 OPT JP8 OPT 2 JP3 OPT 1 2 JP4 OPT 1 2 JP5 OPT 1 2 CONTRACT NO. APPROVALS DRAWN: TECHNOLOGY KIM T. CHECKED: TITLE: APPROVED: DESIGNER: 2 2 1 ENGINEER: MARK T. VCC 2 JP2 OPT SIZE A DATE: 5 4 3 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only USB SERIAL CONTROLLER DWG NO. REV DC590A-1 A Wednesday, December 18, 2002 SHEET 1 3 OF 3 A BILL OF MATERIALS DC590A-1 QTY-525 Linear Technology Corporation USB SERIAL CONTROLLER ENG: MARK THOREN (25-30) 11/9/2004 11:18 AM Item Qty Reference 1 2 C1,C6 2 2 C2,C5 3 1 C3 4 0 C4 5 2 C7,C25 6 14 C8,C10,C12-C15,C17-C24 7 1 C9 8 1 C11 9 1 C16 10 2 D1,D6 11 4 D2,D3,D4,D5 12 5 E1,E2,E3,E4,E5 13 1 JP1 14 1 SHUNTS FOR JP1 15 0 JP2-JP8 16 1 J1 17 1 J2 18 1 J3 19 1 J4 20 2 LED1,LED2 21 1 Q1 22 1 Q2 23 3 RN1,RN2,RN3 24 2 R1,R4 25 3 R2,R14,R19 26 1 R3 27 2 R5,R18 28 1 R6 29 1 R7 30 1 R8 31 7 R9,R11,R21,R44,R47,R48,R49 32 5 R10,R36,R42,R45,R46 33 1 R12 34 4 R13,R22,R35,R38 35 2 R16,R17 36 1 R20 37 6 R23,R24,R26,R27,R33,R40 Part Description CAP., NPO 220PF 50V 10% CAP., X5R 2.2UF 16V 10% CAP., X7R 4.7UF 16V, 20%, 1206 CAP., 0603 CAP., X7R 1000PF 100V 10% CAP., X7R 0.1UF 16V 10% CAP., X7R 0.1UF 50V 10% CAP., X7R 22UF 6.3V, 20%, 1210 CAP., X7R 0.01UF 100V 10% DIODE, SCHOTTKY BAT,SOT23 DIODE,SCHOTTKY, SOT23 TESTPOINT, TURRET, 0.064" JMP, 3PIN 1 ROW .079CC SHUNT, .079" CENTER JMP, 2PIN 1 ROW .100CC CONN, DC PWR JACK,2.00mm CON, USB-B, 4 PINS, SINGLE THR. HOLE HEADER, 2X3PIN, 0.079CC HEADER, 2X7PIN, 0.079CC LED, GREEN, 1206 MOSFET, P-CH, SOT3 TRANS, NPN, MMBT3904, SOT23 RES, 2X4 ARRAY, 330 OHM, CONVEX-SQ RES., Chip 75 1/16W 5%,0603 RES., Chip 1.5K 1/16W 5%,0603 RES., Chip 17.8K 1/16W 1%,0603 RES., Chip 100K 1/16W 1%,0603 RES., Chip 20K 1/16W 5%,0603 RES., Chip 3.01K 1/16W 1%,0603 RES., Chip 15K 1/16W 1%,0603 RES., Chip 10K 1/16W 1% ,0603 RES., Chip 1K 1/16W 5%,0603 RES., Chip 470 1/16W 5%,0603 RES., Chip 2K 1/16W 5%,0603 RES., Chip 10 1/16W 5%,0603 RES., Chip 2.2K 1/16W 5%,0603 RES., Chip 4.99K 1/16W 1%,0603 Page 1 - of - 2 Manufacture / Part # AVX, 06035A221KAT1A AVX, 1206YC225KAT1A TAIYO YUDEN, EMK316BJ475MLT OPT AVX, 06035C102KAT1A AVX, 0603YC104KAT1A AVX, 08055C104KAT1A TAIYO YUDEN, JMK325BJ226MMT AVX, 06031C103KAT1A ZETEX, ZHCS1000 DIODES INC., BAT54A-7 MILL-MAX, 2308-2 COMM-CON, 2802S-03-G1 COMM-CON CCIJ2MM-138G COMM-CON, 3801S-02-G1 CUI-STACK, PJ-002A MILL-MAX, 897-30-004-90-000 COMM CON, 2202S-06G2 MOLEX, 87331-1420 PANASONIC, LN1351C-(TR) FAIRCHILD SEMI., FDN306P DIODES, MMBT3904 AAC, CRN16-4V-331JCM AAC, CR16-750JM AAC, CR16-152JM AAC, CR16-1782FM AAC, CR16-1003FM AAC, CR16-203JM AAC, CR16-3011FM AAC, CR16-1502FM AAC, CR16-1002FM AAC, CR16-102JM AAC, CR16-471JM AAC, CR16-202JM AAC, CR16-100JM AAC, CR16-222JM AAC, CR16-4992FM BILL OF MATERIALS DC590A-1 QTY-525 Linear Technology Corporation USB SERIAL CONTROLLER ENG: MARK THOREN (25-30) 11/9/2004 11:18 AM Item Qty Reference 38 0 R25,R28,R29,R37,R43 39 2 R30,R31 40 2 R32,R41 41 2 R34,R39 42 1 SW1 43 0 TP1,TP2,TP3 44 1 T1 45 1 T2 46 1 U1 47 1 U2 48 1 U3 49 1 U4 50 1 U5 51 1 U6 52 1 U7 53 4 U8,U9,U10,U12 54 2 U11,U13 55 1 U14 56 1 Y1 57 1 Y2 Part Description RES., 0603 RES., Chip 49.9K 1/16W 1%,0603 RES., Chip 169 1/16W 1%,0603 RES., Chip 11.5K 1/16W 1%,0603 SWITCH, LIGHT TOUCH, 2 PINS TP, .070" SMT TRANSFORMER, OCTA-PAC TRANSFORMER, OCTA-PAC I.C., LT1761ES5-5, SOT23-5 I.C., LT1425CS, SO16 I.C., LT1129CST-5, SOT223 I.C., LTC4412ES6, SOT23-6 I.C., PIC16F76, SSOP28G I.C., FT245BM, LQFP32 I.C., 93C46BSM, SO8 I.C., HCPL-2300, DIP8 I.C., LT1719CS6, SOT23-6 I.C., NL17SZ74US, US8 RESONATOR, 10MHz, Y-PANA-EFOMC RESONATOR, 6MHz, CSTLS6M00G NOTES: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS. 2. INSTALL SHUNT ON JP1 PIN 2 AND 3. Page 2 - of - 2 Manufacture / Part # OPT AAC, CR16-4992FM AAC, CR16-1690FM AAC, CR16-1152FM PANASONIC, EVQPPDA25 OPT COILTRONICS, CTX02-13483 COINTRONICS, CTX8-1 LINEAR TECH., LT1761ES5-5 LINEAR TECH., LT1425CS LINEAR TECH., LT1129CST-5 LINEAR TECH., LTC4412ES6 MICROCHIP, PIC16F76 FUTURE TECH., FT245BM MICROCHIP, 93C46BSM AGILENT TECH., HCPL-2300 LINEAR TECH., LT1719CS6 ON SEMI., NL17SZ74US PANASONICS, EFOMC1005T4 MURATA, CSTLS6M00G