DEMO MANUAL DC2026C Linduino One Isolated Arduino-Compatible Demonstration Board DESCRIPTION Linear Technology’s DC2026 (called the Linduino® One) is compatible with the Arduino Uno microcontroller board. Arduino hardware consists of an Atmel microcontroller with a bootloader allowing quick in-circuit firmware updates. The software is a simple programming environment based on the AVRGCC compiler. This platform is popular because it is easy to use, both the hardware and software are open source, and it can be programmed in C. We find it an ideal way to demonstrate and distribute libraries for integrated circuits that have digital interfaces such as Inter-Integrated Circuit (I2C) and Serial Peripheral Interface (SPI). While the Linduino One is Arduino-compatible, it is not produced by the official Arduino team, and they do not receive any monetary support from this board. Please, consider supporting them by purchasing other items from: http://store.arduino.cc L, LT, LTC, LTM, Linear Technology, Linduino and the Linear logo are registered trademarks and QuikEval are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. The Linduino One adds several features to the standard Arduino Uno board: • A 14-pin QuikEval™ connector provides a direct connection to a growing list of hundreds of Linear Technology demo boards, including ADCs, DACs, Power System Management, RF Synthesizers, System Monitor and Control, and many others. • Selectable 5V, 3.3V, 2.5V, 1.8V logic levels and analog supply on QuikEval Connector • An LTM®2884 provides galvanic isolation of USB data and power for both safety and noise rejection. • Auxiliary 7V to 20V power input on isolated side, with conversion to 5V provided by an LT®3973 allowing high power operation up to 750mA. Design files for this circuit board are available at http://www.linear.com/demo/DC2026C ARDUINO SHIELD HEADERS USB TO COMPUTER J1 I/O VOLTAGE SELECTION IN-CIRCUIT PROGRAMMING HEADER QUIK-EVAL COMPATIBLE DEMO BOARD 7V TO 20V AUXILIARY POWER + – 14 CONDUCTOR RIBBON CABLE ARDUINO SHIELD HEADERS Figure 1. Linduino One Basic Connections dc2026cfe 1 DEMO MANUAL DC2026C QUICK START GUIDE The Linduino One comes preloaded with a DC590 emulator program (called a “sketch”) that allows attached demo boards to run with the standard QuikEval GUI software. This allows the functionality of the board to be verified before starting firmware development. After evaluation with QuikEval, the Linduino One can be reprogrammed with customer code. There is a top-level demonstration sketch for each part’s library that provides a text terminal interface to the board, demonstrating the library functions. The Linduino One is also available as DC2026C-KIT, which includes a DC934 as an easy to use example daughter board. DC934 is the demonstration board for the LTC®2607 dual 16-bit, I2C digital to analog converter (DAC). This board also has an LTC2422 2-channel, 20-bit, SPI interface analog to digital converter (ADC) that reads back the DAC output. Thus, this board demonstrates operation of both SPI and I2C interfaces, and multichannel ADCs and DACs. The following sections describe the procedure for installing the required software and operating the DC934 with both QuikEval software and with a terminal based demo program. While this manual describes operation with the DC934, the procedure applies to other boards as well. Manual Software Installation 1)Download LTSketchbook.zip from www.linear.com/ docs/43958. This is the entire code base for the Linduino board, including all demo code, libraries for individual devices, auxiliary functions, and HTML documentation. Extract this file to a location for working files, such as your “My Documents” directory or “C:\Projects”. 2)Note: If QuikEval is already installed, please update to the latest version by selecting Tools → Update Program, then proceed to step 3. If not, download and run QuikEval from www.linear.com/software. This installs the QuikEval program, as well as the FTDI USB drivers required for the Linduino One (and other Linear Technology interface boards.) Drivers are also distributed with the Arduino IDE, but it is recommended to let QuikEval install the drivers to ensure compatibility with the Linduino One. You will be prompted to connect the board to the PC during installation. Once the installation is complete, quit QuikEval. 3)Download the Arduino Integrated Development Environment (IDE) from either http://arduino.cc/en/Main/Software or http://www.linear.com/designtools/linduino.php (Version 1.6.4 is used in this manual.) This is not an installer; no installation is necessary. Extract the contents of this file to a convenient location for programs, such as “C:\Program Files”. The “Arduino.exe” file is the actual program file; double-click to open the Arduino IDE. 2 dc2026cfe DEMO MANUAL DC2026C QUICK START GUIDE Arduino IDE Setup 1)From within the Arduino IDE, click on File → Preferences Under Sketchbook Location: select Browse, and locate the path to the extracted LTSketchbook.zip file. The correct location will show “LTSketchbook” in the Look In menu, and at least four subdirectories will be shown: Documentation, Libraries, Part Number and Utilities (more may be added in the future). Click Open, then click OK. dc2026cfe 3 DEMO MANUAL DC2026C QUICK START GUIDE 2)Under Tools menu, select Board → Arduino Uno 4 dc2026cfe DEMO MANUAL DC2026C QUICK START GUIDE 3)Under the Tools menu, select Serial Port. There may be more than one option; the Linduino One is usually the highest COM port number (COM12 is shown below). dc2026cfe 5 DEMO MANUAL DC2026C QUICK START GUIDE 4)Click on the Serial Monitor, which looks like a magnifying glass: This will bring up the monitor window: Select Newline terminator and set the baud rate to 115200. You should see a “hello” message – this indicates that serial communication is set up properly, and that the DC590 emulator firmware is properly installed. Pressing the RESET button on the Linduino One will cause the message to be sent again. If this message does not appear, try a different COM port. (Note: The DC590 emulator sketch can be restored by following the procedure detailed below for uploading the DC934 sketch, substituting the DC590 sketch which is located in File → Sketchbook → Utilities → DC590B.) 5)Quit the Arduino IDE. Note that a restart is required every time the Sketchbook location is changed. 6 dc2026cfe DEMO MANUAL DC2026C QUICK START GUIDE Running with QuikEval Linear Technology demo boards with the 14-pin QuikEval connector are normally used in conjunction with a DC590B interface board and the QuikEval software package running on a PC. Designers can then use the software to evaluate the performance of the product on the demo board. The Linduino One comes programmed with firmware that allows it to emulate the DC590B controller, so the QuikEval software can be used to check basic functionality in a target system. Connect the DC934 to the Linduino One with the supplied 14-pin ribbon cable. Run QuikEval. The control panel for the LTC2607 will appear, and clicking COLLECT will start communication with the board. The onboard LTC2422 ADC reads back the output voltages, and the voltage may be changed by entering a number in the appropriate box or by moving the sliders. Quit QuikEval after this step. dc2026cfe 7 DEMO MANUAL DC2026C QUICK START GUIDE Running with the Linduino Demonstration Program After the DC934 has been run with the user-friendly QuikEval GUI, a demonstration program can be loaded into the Linduino One that demonstrates the library functions for the LTC2607 and LTC2422. 1)Open the Arduino IDE. Find the part number on the demo board, LTC2607 in this case. In the File menu select Sketchbook → Part Number → 2000 → 2600 → 2607 → DC934A. (There may be other entries for a particular part number showing example usage cases, experiments, etc. The entry for the demo circuit number is the general-purpose demonstration program and is a good place to start.) 8 dc2026cfe DEMO MANUAL DC2026C QUICK START GUIDE A new window will appear with the sketch. 2)Upload the sketch by clicking the UPLOAD button: When this process is completed, a message at the bottom should display a similar message as shown. dc2026cfe 9 DEMO MANUAL DC2026C QUICK START GUIDE 3)Open the Serial Monitor (magnifying glass icon) once more. The monitor will now display the program interface. To use the program, enter commands into the text box, then click the Send button. 10 dc2026cfe DEMO MANUAL DC2026C QUICK START GUIDE Going Further Jumpers After completing the procedure in this Quick Start Guide, all of the tools are in place to move on to other products or further experimentation with the DC934. The main page for all Linduino resources is: JP1: Factory use only. http://www.linear.com/designtools/linduino.php HTML documentation for the code is provided in the sketchbook in the Documentation subdirectory. External Connections J1: QuikEval header – Connection to QuikEval demonstration board. This connector provides 5V at 50mA, 7.6V at 50mA, SPI and I2C interfaces, and an auxiliary I2C interface for identification of the attached demonstration board. J2: AC ADAPTOR IN – 2.1mm × 5.5mm barrel connector. Optional DC power input, 7V to 20V DC. With external power applied, up to 750mA can be drawn from the 5V supply (available on pins 2 and 5 on J3, or pin 10 on J1.) JP2: Reset configuration, not installed. When the ICSP header is used with an external tool, install a 3 position, 0.1" header in this location and cut the trace labeled NORM on the back side of the board. Place jumper in the righthand position (opposite to NORM) to allow the ICSP tool to control the RESET signal, install in the NORM position to allow the FT232 DTR signal to control RESET (this is normal Arduino operation, and required to program the board from within the Arduino IDE.) JP3: VCCIO selection 5V (default), 3.3V, 2.5V, remove for 1.8V, or EXT to disable the onboard regulator and supply VCCIO to the DC2026 from the attached demo board. Refer to the documentation for the attached demo board for information on acceptable voltage levels.VCCIO is the low-voltage supply for the attached demo board. It also sets the logic level for the SPI and I2C signals. LEDs J3, J6, J7, J8: Arduino shield headers. These headers are compatible with standard Arduino “shield” add-on boards. Refer to schematic for individual signals. ON: Lights when 5V supply is on, from which all other supply voltages are generated. J4: ICSP – In-circuit serial programming header. Used in conjunction with an external programming tool such as an AVR Dragon or JTAGICE3. SCK: Lights when Arduino pin 13 (SCK on the SPI bus) is high. This is the pin used in the “blink” sketch under File → Examples → Basics → Blink. J5: USB – Connection to the host computer. Power for the Linduino and the connected daughter board is also taken from J5 if no external power is supplied to J2. RX: Lights when data is being received from the host computer through the USB port. TX: Lights when data is being sent to the host computer through the USB port. RESET Button (S1): Asserts the ATMega328’s RESET line, restarting program execution. dc2026cfe 11 12 PC USB 5V USB D+_USB D–_USB MAX 200mA 5V_ISO GND_ISO D+_ISO D–_ISO LTM2884 USB ISOLATOR 5V_USB GND_USB AC ADAPTER 7V TO 20V OUT PIN 0 PIN 1 5V LT3461 BOOST OUT SERIAL RESET I/O I/O (FOR ADC) ATMEGA328P 5V LT1761 IN OUT LDO IN MAX 750mA LT1761 LDO OUT 5V LOW NOISE 7V PIN A4/I2C SDA PIN 11/SPI MOSI PIN 13/SPI SCK PINS 2-13 PIN A5/I2C SCL LT1761 IN LDO OUT IN PINS A0-A5 3.3V 7.6V PIN NAMES CORRESPOND TO ARDUINO PINS. PIN 8 SWITCHES MUX BETWEEN MICROCONTROLLER I2C PORT (PINS A4, A5) AND MICROCONTROLLER SPI PORT (PINS 11, 13) DEMO BOARD EEPROM (EESCI, EESDA) IS ALWAYS CONNECTED TO MICROCONTROLLER I2C PORT (PINS A4, A5) FTDI USB-TO-SERIAL + D TX D– RX DTR 5V LTC4411 IDEAL DIODE IN LT3973 BUCK MAX 750mA PIN 12 PIN 8 5V LT1719 + – TP3 TP4 VCCIO VCCIO/2 PIN 8 PIN 8 VCC VCC2 SCLIN SCLOUT SDAIN SDAOUT EN DISCEN READY FAULT ACC PIN 9 PIN 10 5V 7V PIN A5 PIN A4 VCCIO J1 EEVCC EESCL EEDA EEGND DC2026 BD V+ VCCIO GPIO SCL/SCK SDA/MOSI MISO CS GND DEMO MANUAL DC2026C BLOCK DIAGRAM dc2026cfe DEMO MANUAL DC2026C PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 1 2 C1, C7 CAP., X5R, 4.7μF, 16V, 10%, 0603 TDK, C1608X5R1C475K080AC 2 2 C2, C14 CAP., X7R, 0.01μF, 16V, 10%, 0603 AVX, 0603YC103KAT2A 3 4 C3, C9, C12, C15 CAP., X5R, 10μF, 16V, 10%, 0805 MURATA, GRM21BR61C106KE15L 4 5 C4, C13, C17, C18, C23 CAP., X7R, 1μF, 16V, 10%, 0603 TDK, C1608X7R1C105K080AC 5 1 C5 CAP., NPO, 15pF, 50V, 10%, 0603 AVX, 06035A150KAT2A 6 1 C6 CAP., X5R, 4.7μF, 25V, 10%, 0805 TDK, C2012X5R1E475K125AB 7 10 C8, C19-C22, C25, C28, C32-C34 CAP., X7R, 0.1μF, 16V, 10%, 0603 AVX, 0603YC104KAT2A 8 1 C10 CAP., COG, 10pF, 25V, 10%, 0402 AVX, 04023A100KAT2A 9 1 C11 CAP., X5R, 22μF, 6.3V, 20%, 1206 TAIYO YUDEN, JMK316ABJ226MLHT 10 1 C16 CAP., X7R, 2.2μF, 50V, 10%, 1206 MURATA, GRM31CR71H225KA88L 11 1 C24 CAP., X7R, 0.047μF, 16V, 10%, 0603 AVX, 0603YC473KAT2A 12 1 C26 CAP., ALUM., 10μF, 50V, 10%, SMT SUN ELECT., 50CE10BSS 13 1 C27 CAP., X5R, 0.22μF, 10V, 20%, 0402 AVX, 0402ZD224MAT2A 14 0 C29 CAP., OPT, 0805 OPTION 15 2 C30, C31 CAP., X7R, 2.2nF, 1kV, 10%, 1206 AVX, 1206AC222KAT1A 16 3 D1, D4, D5 LED,YELLOW, DIFFUSED, 0805 AVAGO, HSMY-C170 17 1 D2 LED, GREEN, DIFFUSED, 0805 AVAGO, HSMG-C170 18 1 D3 DIODE, SCHOTTKY, 100V, 2A, SMB DIODES INC., B2100-13-F 19 1 JP3 HEADER, 2×4 PIN, 0.079CC SULLINS, NRPN042PAEN-RC 20 1 J1 HEADER, 2×7 DUAL ROW MOLEX, 87831-1420 21 1 J2 CONNECTOR, POWER JACK, 2.1mm CUI INC., PJ-002AH 22 2 J3, J8 CONN., RECEPT., 0.100, 8 POSITION SULLINS, PPPC081LFBN-RC 23 1 J4 HEADER, 2×3 PIN, 0.100 SAMTEC, TSW-103-07-L-D 24 1 J5 CONNECTOR, USB TYPE B, RIGHT ANGLE PCB MOUNT FCI, 61729-0010BLF 25 1 J6 CONN., RECEPT., 0.100, 10 POSITION SULLINS, PPPC101LFBN-RC 26 1 J7 CONN., RECEPT., 0.100, 6 POSITION SULLINS, PPPC061LFBN-RC 27 1 L1 INDUCTOR, 15μH, 1.3A, SMD COOPER MPI4040R3-150-R 28 1 L2 INDUCTOR, SHIELDED POWER, 10μH, SMT COILCRAFT, XFL3010-103ME 29 4 MP1-MP4 BUMPER, ADHESIVE-BACKED 3M, SJ5376 30 1 Q1 TRANSISTOR, MOSFET, N-CH 60V,150mA, SOT-23 DIODES INC., VN10LFTA 31 1 R1 RES., CHIP, 64.9k, 1/10W, 1% 0603 VISHAY, CRCW060364K9FKEA 32 1 R2 RES., CHIP, 47.5k, 1/10W, 1% 0603 VISHAY, CRCW060347K5FKEA 33 1 R3 RES., CHIP, 215k, 1/10W, 1% 0603 VISHAY, CRCW0603215KFKEA 34 1 R4 RES., CHIP, 13.7k, 1/10W, 1% 0603 VISHAY, CRCW060313K7FKEA 35 1 R5 RES., CHIP, 42.2k, 1/10W, 1% 0603 VISHAY, CRCW060342K2FKEA 36 4 R6, R7, R9, R10 RES., CHIP, 4.99k, 1/10W, 1% 0603 VISHAY, CRCW06034K99FKEA 37 6 R8, R25, R48, R52, R53, R54 RES., CHIP, 49.9k, 1/10W, 1% 0603 VISHAY, CRCW060349K9FKEA 38 0 R11, R32 RES., CHIP, OPT, 0805 OPTION 39 14 R12, R13, R15, R17, R20, R21, R22, R23, R24, R35, R36, R42, R44, R46 RES., CHIP, 1k, 1/10W, 1% 0603 VISHAY, CRCW06031K00FKEA dc2026cfe 13 DEMO MANUAL DC2026C PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 40 1 R14 RES., CHIP, 1MEG, 1/16W, 1%, 0402 VISHAY, CRCW04021M00FKED 41 1 R16 RES., CHIP, 1MEG, 1/10W, 1%, 0603 VISHAY, CRCW06031M00FKEA 42 5 R18, R40, R41, R45, R47 RES., CHIP, 10k, 1/10W, 1%, 0603 VISHAY, CRCW060310K0FKEA 43 1 R19 RES., CHIP, 86.6k, 1/10W, 1%, 0603 NIC, NRC06F8662TRF 44 5 R25, R48, R52, R53, R54 RES., CHIP, 49.9k, 1/10W, 1%, 0603 VISHAY, CRCW060349K9FKEA, NIC, NRC06F4992TRF 45 1 R26 RES., CHIP, 0.20Ω, 1/4W, 5%, 0805 PANASONIC, ERJ-S6SJR20V 46 1 R27 RES., CHIP, 107k, 1/16W, 1%, 0402 VISHAY, CRCW0402107KFKED 47 1 R28 RES., CHIP, 475k, 1/16W, 1%, 0402 VISHAY, CRCW0402475KFKED 48 1 R29 RES., CHIP, 215k, 1/16W, 1%, 0402 VISHAY, CRCW0402215KFKED 49 1 R30 RES., CHIP, 316k, 1/16W, 1%, 0402 VISHAY, CRCW0402316KFKED 50 1 R31 RES., CHIP, 100Ω, 1/10W, 5%, 0603 VISHAY, CRCW0603100RJNEA 51 0 R33, R34, R37, R38, R43 RES., CHIP, OPT, 0603 OPTION 52 1 R39 RES., CHIP, 0Ω, 1/10W, 0603 VISHAY, CRCW06030000Z0EA 53 1 R49 RES., CHIP, 105k, 1/10W, 1%, 0603 VISHAY, CRCW0603105KFKEA 54 1 R50 RES., CHIP, 19.1k, 1/10W, 1%, 0603 VISHAY, CRCW060319K1FKEA 55 1 R51 RES., CHIP, 40.2k, 1/10W, 1%, 0603 VISHAY, CRCW060340K2FKEA 56 2 R55, R56 RES., 49.9Ω, 1/10W, 1%, 0603 NIC, NRC06F49R9TRF 57 1 R57 RES., 24.9Ω, 1/10W, 1%, 0603 NIC, NRC06F24R9TRF 58 1 S1 SWITCH, PUSHBUTTON, MINIATURE WÜRTH ELEKTRONIK, 434111025826 59 1 U1 MODULE, USB TRANSCEIVER, BGA-44 LINEAR TECH., LTM2884CY#PBF 60 1 U2 IC, DC-DC CONVERTER, TSOT-23 LINEAR TECH., LT3461ES6#PBF 61 1 U3 IC, LDO MICROPOWER REGULATOR, ADJUSTABLE, TSOT-23 LINEAR TECH., LT1761ES5-SD#PBF 62 1 U4 IC, BUS BUFFER, 2-WIRE, MSOP LINEAR TECH., LTC4315CMS#PBF 63 1 U5 IC, LDO MICROPOWER REGULATOR, 3.3V, TSOT-23 LINEAR TECH., LT1761ES5-3.3#PBF 64 1 U6 IC, IDEAL DIODE, LOW LOSS,TSOT-23 LINEAR TECH., LTC4411ES5#PBF 65 1 U7 IC, MICROCONTROLLER ATMEL, ATMEGA328P-AU 66 1 U8 IC, LDO MICROPOWER REGULATOR, ADJUSTABLE, TSOT-23 LINEAR TECH., LT1761ES5-BYP#PBF 67 1 U9 IC, USB UART, 28-SSOP FTDI, FT232RL-REEL 68 1 U10 IC, STEP-DOWN REGULATOR, MS10 LINEAR TECH., LT3973EMSE#PBF 69 1 U11 IC., SINGLE/DUAL-SUPPLY COMPARATOR LINEAR TECH., LT1719CS6#PBF 70 2 U12, U13 IC, TRI-STATE UHS BUFFER, US8 FAIRCHILD, NC7WZ125K8X 71 1 XJP3 SHUNT, 2mm SAMTEC, 2SN-BK-G 72 1 Y1 RESONATOR, 16MHz, SMT MURATA, CSTCE16M0V53-R0 14 dc2026cfe A B C D FROM U1 PAGE 2 C23 1.0uF 16V DISO+ DISO- C20 0.1uF 16V ON D2 GREEN 4 5 SCK 17 28 27 24 19 8 15 16 20 3V3OUT OSCO OSCI NC CBUS4 CBUS3 CBUS2 CBUS1 1 13 Q1 VN10LF RX +5V D4 YELLOW R13 1K RI# DCD# DSR# DTR# CTS# RTS# RXD TXD CBUS0 FT232RL RESET# NC USBDP USBDM VCC +5V R20 1K 12 14 13 22 23 6 10 9 2 11 3 5 1 R21 1K J3 +5V 3V3 GND 22 19 4 6 21 3 5 20 18 8 7 4 J8 ADC7 ADC6 VCC VCC GND GND GND AREF AVCC J7 ANALOG IN TX_1 RX_0 PD7(AIN1) PD6(AIN0) PD5(T1) PD4(XCK/T0) PD3(INT1) PD2(INT0) PD1(TXD) PDO(RXD) PC5(ADC5/SCL) PC4(ADC4/SDA) PC3(ADC3) PC2(ADC2) PC1(ADC1) PC0(ADC0) PB5(SCK) PB4(MISO) PB3(MOSI/OC2A) PB2(SS/OC1B) PB1(OC1A) PB7(XTAL2/TOSC2) PB0(ICP1) PB6(XTAL1/TOSC1) ATMEGA328P-AU U7 DIGITAL(PWM~) PC6 (RESET) VIN FROM J2, PAGE 2 C28 0.1uF 16V +5V 29 NOTE: ALL RESISTORS AND CAPACITORS ARE SIZE 0603 UNLESS OTHERWISE SPECIFIED. TX RESET C19 0.1uF 16V C22 0.1uF 16V R24 1K J6 R16 1 MEG RESET R23 1K C18 1.0uF 16V AREF 2 POWER Y1 16 Mhz R18 10K D5 YELLOW R22 1K +5V C21 0.1uF 16V TRACE ON BOTTOM SIDE 3 U9 NORM VCCIO D1 YELLOW R12 1K +5V JP2 OPT R31 100 1 10 9 8 7 6 5 4 3 2 1 SCL SDA AREF GND 13 12 ~11 ~10 ~9 8 MUX 3 3 8 A3 A2 A1 A0 13 12 ~11 ~10 ~9 +5V 11 7 10 ~6 9 ~5 2 4 1 ~3 32 2 31 30 28 27 26 25 24 23 17 16 15 14 13 12 R52 49.9K R15 1K 5 1 2 4 9 12 +5V R42 1K 5 1 ACC EN DISCEN SCLIN SDAIN VCC READY FAULT SCLOUT SDAOUT VCC2 7 8 3 10 11 6 4 ICSP J4 +5V 2 TP4 TP3 SCK/SCL R41 10K APPROVALS 1 1 C25 0.1uF R40 10K VCCIO R45 10K 6 NC7WZ125K8X U12-1 U12-2 VCCIO VCCIO R46 1K LTC4315CMS U4 - + 3 MUX 2 3 R35 1K LT1719CS6 U11 +5V 5 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CUSTOMER NOTICE R34 OPT C32 0.1uF R43 OPT R44 1K C8 0.1uF SCL SDA R17 1K R54 49.9K R25 49.9K C34 0.1uF VCCIO 2 MOSI/SDA U13-1 CS +5V 2 1 3 8 13 4 5 7 6 14 10 11 9 12 7V VCCIO GPIO 1630 McCarthy Blvd. Milpitas, CA 95035 R56 49.9 VCCIO R9 4.99K R57 24.9 R55 49.9 R10 4.99K VCCIO R7 4.99K 3 U13-2 R36 1K R37 VCCIO OPT 6 R39 0 OHM NC7WZ125K8X VCCIO 2 R6 4.99K +5V 5 C33 0.1uF IO GND GND GND SCK/SCL MISO MOSI/SDA CS GPIO EEVCC EESCL EESDA EEGND 5V V+ J1 01 R38 OPT SKU UPDATE TO DC2026C: ADDED R52-R57 DESCRIPTION PRODUCTION RELEASE DC2026B: M.THOREN 4/03/2014 - REV 1 REVISION HISTORY 2 SCALE = NONE 1 SHEET DEMO CIRCUIT 2026C IC NO.LTM2884 DATE: 05/29/2015 N/A SIZE 1 OF 2 1 REV. LINEAR TECHNOLOGY ISOLATED ARDUINO-COMPATIBLE DEMONSTRATION BOARD LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A Phone: (408)432-1900 www.linear.com CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY Fax: (408)434-0507 HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. LTC Confidential-For Customer Use Only M.HAWKINS VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG.MARK THOREN TITLE: SCHEMATIC CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT LINDUINO ONE: PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. OPT R33 R53 49.9K R8 49.9K +5V 5 3 1 7 S1 4 8 4 2 GND 8 4 8 RESET 2 1 AGND 25 GND 7 2 1 3 2 2 1 18 GND 21 TEST 26 2 1 1 3 1 2 3 4 5 6 7 8 6 1 8 7 6 5 4 3 2 1 A0 A1 A2 A3 SDA SCL 4 2 6 1 7 ~6 ~5 4 ~3 2 TX_1 RX_0 1 2 3 4 5 6 GND 8 4 4 7 5 A B C D DEMO MANUAL DC2026C SCHEMATIC DIAGRAM 15 dc2026cfe A B C 1 2 3 4 5 6 A6 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 A3 A4 A5 A2 A1 A7 A11 A10 A9 A8 4 GND GND GND GND GND GND GND GND GND GND GND GND BUMPER, ADHESIVE-BACKED BUMPER, ADHESIVE-BACKED BUMPER, ADHESIVE-BACKED MP2 MP3 MP4 5 BUMPER, ADHESIVE-BACKED PCB MECHANICAL PARTS U1 FB VOUT 3 5 2.2nF1kV 1206 C30 L3 L4 L6 L7 K1 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11 L2 L1 L5 L11 L10 L9 L8 C5 15pF C6 4.7uF 25V 0805 DISO- DISO+ C17 1.0uF 16V TO U9 PAGE 1 R11 OPT 0805 3 1 SIZE 0603 UNLESS OTHERWISE SPECIFIED. 4 2 CTL B2100 1 STAT VOUT LTC4411ES5 IN U6 R26 0.20 OHMS 0805 D3 1/4W USB 5V OUTPUT 200mA MAX R5 42.2K R3 215K OUTPUT 7.6V @ 100mA NOTE: ALL RESISTORS AND CAPACITORS ARE 2.2nF1kV 1206 C31 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 GND2 D2+ D2- VLO2 VCC2 VCC2 VCC2 VCC2 7.6V LT3461ES6 U2 LTM2884CY SPND-PWR ON VLO D1+ D1- VBUS TO J3, PAGE 1 VIN SHDN VCC VCC VCC VCC USB GND USB GND C24 0.047uF 16V R2 47.5K VIN MP1 7V-20V INPUT 1 3 2 AC ADAPTOR IN J2 C29 OPT USB GND USBVCC USBDUSBD+ USBGND USB GND R32 OPT USB J5 C4 1.0uF 16V 6 2 L2 10uH 1 SW GND 2 D 1 TP1 +5V R27 107K 0402 R28 475K 0402 + C26 10uF 50V SUNCON 4 1 5 3 SW BOOST BD FB RT U10 6 7 8 1 10 4 5 3 4 5 R50 19.1K R29 215K 0402 JP3 ADJ VOUT R19 R51 86.6K 40.2K LT3973EMS VIN PG EN/UVLO OUT GND SHDN IN U3 BYP ADJ LT1761ES5-SD IN CUSTOMER NOTICE 4 9 3 2 5 R47 10K 3 1 1 VOUT C13 1.0uF 16V R49 105K R48 49.9K C2 0.01uF 16V 7V R30 316K 0402 3 1 U5 JP1 OPT SHDN IN BYP VOUT 5 4 C15 10uF 16V 0805 3V3 C14 0.01uF 16V 3.3V 3.3V OUTPUT 50mA MAX TRACE ON BOTTOM SIDE VCCIO 2 LT1761ES5-3.3 1 C3 10uF 16V 0805 1 C10 10pF COG 0402 L1 15uH SMT C11 22uF 1206 +5V 1630 McCarthy Blvd. Milpitas, CA 95035 AC ADAPTOR 5V OUTPUT 750mA MAX R4 13.7K R1 64.9K R14 1MEG 0402 C27 0.22uF 0402 +5V C9 10uF 16V 0805 APPROVALS 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 SCALE = NONE 1 SHEET DEMO CIRCUIT 2026C IC NO.LTM2884 DATE: 05/29/2015 N/A SIZE 2 OF 2 1 REV. LINEAR TECHNOLOGY ISOLATED ARDUINO-COMPATIBLE DEMONSTRATION BOARD LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A Phone: (408)432-1900 www.linear.com CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY Fax: (408)434-0507 HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. LTC Confidential-For Customer Use Only M.HAWKINS VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG.MARK THOREN TITLE: SCHEMATIC CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT LINDUINO ONE: PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. C16 2.2uF TP2 1 1206 50V C12 10uF 16V 0805 C7 16V 4.7uF C1 4.7uF 16V U8 LT1761ES5-BYP 2 1 GND 2 GND 2 GND 2 6 5 +5V 3 4 3 EXT 2.5V 8 7 5V 3.3V 4 GND 11 1 2 GND 16 2 5 A B C D DEMO MANUAL DC2026C SCHEMATIC DIAGRAM dc2026cfe DEMO MANUAL DC2026C REVISION HISTORY (Revision history begins at Rev C of Manual) BOARD REV DATE DESCRIPTION B 08/14 Added circuitry to allow adjustment of VCCIO voltage and SPI/I2C logic levels PAGE NUMBER C 06/15 Revised Board to C, added pull-up resistors to U12, U13 inputs. Added source termination resistors to U1, U13 outputs. 13, 14, 15 C 03/16 Update text, screenshots to show Arduino 1.6.4 2, 4, 5, 8, 9 11, 12 dc2026cfe 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. 17 DEMO MANUAL DC2026C 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 18 Linear Technology Corporation dc2026cfe LT 0316 REV E • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2013