dc2026a - linduino one isolated arduino-compatible ... · arduino-compatible demonstration board...

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DEMO MANUAL DC2026A

Description

Linduino One Isolated Arduino-Compatible

Demonstration Board

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 up-dates. 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 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.

The Linduino One adds several features to the standard Arduino Uno board:

• A 14-pin QuikEval™ connector provides a direct connec-tion 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.

• 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

Figure 1. Linduino One Basic Connections

IN-CIRCUITPROGRAMMINGHEADER

ARDUINO SHIELD HEADERS

ARDUINO SHIELD HEADERS

QUIK-EVALCOMPATIBLEDEMO BOARD

14 CONDUCTORRIBBON CABLE

AUXILIARYPOWER

USB TOCOUMPUTER

7V TO 20V

+ –

http://www.linear.com/LTM2884

http://www.linear.com/LT3973

http://www.linear.com/demo

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DEMO MANUAL DC2026A

Quick start GuiDeThe Linduino One comes preloaded with a DC590 emula-tor 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 DC2107, 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 inter-face 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.

Software Installation

1) Download LTSketchbook.zip from http://www.linear.com/designtools/linduino.php 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 Pro-gram, 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 Tech-nology 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 Envi-ronment (IDE) from either http://arduino.cc/en/Main/Software or http://www.linear.com/designtools/linduino.php

(Version 1.0.4 is used in this manual.) This is not an installer; no installation is necessary. Extract the con-tents 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.

http://www.linear.com/designtools/linduino.php


www.linear.com/software

http://arduino.cc/en/Main/Software


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DEMO MANUAL DC2026A

Quick start GuiDeArduino 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: Documenta-tion, Libraries, Part Number and Utilities (more may be added in the future). Click Open, then click OK.

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DEMO MANUAL DC2026A

2) Under Tools menu, select Board → Arduino Uno

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).

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DEMO MANUAL DC2026A

Quick start GuiDe4) 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.

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DEMO MANUAL DC2026A

Quick start GuiDeRunning 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 al-lows 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.

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DEMO MANUAL DC2026A

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.)

Quick start GuiDe

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DEMO MANUAL DC2026A

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.

Quick start GuiDe

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DEMO MANUAL DC2026A

Quick start GuiDe3) 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.

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DEMO MANUAL DC2026A

Quick start GuiDeGoing Further

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:


HTML documentation for the code is provided in the sketchbook in the Documentation subdirectory.

External Connections

J1: QuikEval header – Connection to QuikEval demonstra-tion 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.)

J3, J6, J7, J8: Arduino shield headers. These headers are compatible with standard Arduino “shield” add-on boards. Refer to schematic for individual signals.

J4: ICSP – In-circuit serial programming header. Used in conjunction with an external programming tool such as an AVR Dragon or JTAGICE3.

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.

Jumpers

JP1: Factory use only.

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 right-hand 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.)

LEDs

ON: Lights when 5V supply is on, from which all other supply voltages are generated.

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.

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.


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DEMO MANUAL DC2026A

Block DiaGram

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DEMO MANUAL DC2026A

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

1 2 C1, C7 CAP., X5R, 4.7µF, 16V 10% 0603 TDK, C1608X5R1C475K

2 3 C2, C8, 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, C1608X7R1C105K

5 1 C5 CAP., NPO, 15pF, 50V 10% 0603 AVX, 06035A150KAT2A

6 1 C6 CAP., X5R, 4.7µF, 25V 10% 0805 TDK, C2012X5R1E475K

7 1 C10 CAP., COG, 10pF, 25V 10% 0402 AVX, 04023A100KAT2A

8 1 C11 CAP., X5R, 22µF, 6.3V 20% 1206 TAIYO YUDEN, JMK316BJ226ML-T

9 1 C16 CAP., X7R, 2.2µF, 50V 10% 1206 MURATA, GRM31CR71H225KA88L

10 6 C19, C20, C21, C22, C25, C28

CAP., X7R, 0.1µF, 16V 10% 0603 AVX, 0603YC104KAT2A

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 J1 HEADER, 2×7 DUAL ROW MOLEX 87831-1420

20 1 J2 CONNECTOR, POWER JACK, 2.1mm CUI INC., PJ-002AH

21 2 J3, J8 CONN., RECEPT., 0.100, 8 POSITION SULLINS, PPPC081LFBN-RC

22 1 J4 HEADER, 2mm × 3mm PIN, 0.100 SAMTEC, TSW-103-07-G-D

23 1 J5 CONNECTOR, USB TYPE B, RIGHT ANGLE PCB MOUNT FCI, 61729-0010BLF (6tbs × 44)

24 1 J6 CONN., RECEPT., 0.100, 10 POSITION SULLINS, PPPC101LFBN-RC

25 1 J7 CONN., RECEPT., 0.100, 6 POSITION SULLINS, PPPC061LFBN-RC

26 1 L1 INDUCTOR, 15µH, 1.3A, SMD COOPER/COILTRONICS, MPI4040R3-150-R

27 1 L2 INDUCTOR, SHIELDED POWER, 10µH, SMT COILCRAFT, XFL3010-103ME

28 1 Q1 TRANSISTOR, MOSFET, N-CH 60V,150mA, SOT-23 DIODES INC., VN10LF

29 1 R1 RES., CHIP, 64.9k, 1/10W, 1% 0603 VISHAY, CRCW060364K9FKEA


31 1 R3 RES., CHIP, 215k, 1/10W, 1% 0603 VISHAY, CRCW0603215KFKEA



34 5 R6, R7, R8, R9, R10 RES., CHIP, 4.99k, 1/10W, 1% 0603 VISHAY, CRCW06034K99FKEA

35 0 R11, R17, R19, R32 RES., CHIP, OPT, 0805 OPTIONAL

36 8 R12, R13, R15, R20, R21, R22, R23, R24

RES., CHIP, 1k, 1/10W, 1% 0603 VISHAY, CRCW06031K00FKEA

37 1 R14 RES., CHIP, 1M, 1/16W, 1% 0402 VISHAY, CRCW04021M00FKED

38 1 R16 RES., CHIP, 1M, 1/10W, 1% 0603 VISHAY, CRCW06031M00FKEA

39 1 R18 RES., CHIP, 10k, 1/10W, 1% 0603 VISHAY, CRCW060310K0FKEA

40 0 R25 RES., CHIP, OPT, 0603 OPTIONAL

parts list

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DEMO MANUAL DC2026A

parts listITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

41 1 R26 RES., CHIP, 0.20Ω, 1/4W, 5% 0805 PANASONIC, ERJ-S6SJR20V

42 1 R27 RES., CHIP, 107k, 1/16W, 1% 0402 VISHAY, CRCW0402107KFKED




46 1 R31 RES., CHIP, 100Ω, 1/16W, 5% 0603 VISHAY, CRCW0603100RJKEA

47 1 S1 SWITCH, PUSHBUTTON, MINIATURE WÜRTH, 434 111 025 826

48 1 U1 MODULE, USB TRANSCEIVER, BGA-44 LINEAR TECH., LTM2884CY#PBF

49 1 U2 IC, DC/DC CONVERTER, TSOT-23 LINEAR TECH., LT3461ES6#PBF

50 1 U3 IC, LDO MICROPOWER REGULATOR, 5V, TSOT-23 LINEAR TECH., LT1761ES5-5#PBF

51 1 U4 IC, ANALOG SWITCH, 10-MSOP FAIRCHILD, FSA2257MUX

52 1 U5 IC, LDO MICROPOWER REGULATOR, 3.3V, TSOT-23 LINEAR TECH., LT1761ES5-3.3#PBF

53 1 U6 IC, IDEAL DIODE, LOW LOSS,TSOT-23 LINEAR TECH., LTC4411ES5#TRMPBF

54 1 U7 IC, MICROCONTROLLER ATMEL, ATMEGA328P-AU

55 1 U8 IC, LDO MICROPOWER REGULATOR, ADJUSTABLE, TSOT-23

LINEAR TECH., LT1761ES5-BYP#TRMPBF

56 1 U9 IC, USB UART, 28-SSOP FTDI, FT232RL-REEL

57 1 U10 IC, STEP-DOWN REGULATOR, MS10 LINEAR TECH., LT3973EMSE#PBF

58 1 Y1 RESONATOR, 16MHz, SMT MURATA, CSTCE16M0V53-R0

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DEMO MANUAL DC2026A

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MO

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CU

IT 2

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23

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0.1u

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V

C22

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S1

S1

15dc2026afa

DEMO MANUAL DC2026A

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 representa-tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

schematic DiaGram5 5

4 4

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0

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MAT

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SUPP

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USE

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H LI

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PART

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ALE

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NE

www.

linea

r.com 2

DE

MO

CIR

CU

IT 2

026A

22

N/A

SIZE

DATE

:

IC N

O.

REV.

SHEE

TOF

TITL

E:

APPR

OVA

LS

PCB

DES.

APP

ENG.

TEC

HN

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GY

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(408

)434

-050

7

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itas,

CA

9503

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(408

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0

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arth

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www.

linea

r.com 2

DE

MO

CIR

CU

IT 2

026A

22

N/A

SIZE

DATE

:

IC N

O.

REV.

SHEE

TOF

TITL

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APPR

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PCB

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(408

)434

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itas,

CA

9503

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0

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arth

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www.

linea

r.com 2

DE

MO

CIR

CU

IT 2

026A

22

N/A

TP1

TP1

1

R14

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02

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107K

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1.0u

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6

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9

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K6

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K8

GN

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K9

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16dc2026afa

DEMO MANUAL DC2026A

Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 2013

LT 0913 REV A • PRINTED IN USA

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 applica-tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Copyright © 2004, Linear Technology Corporation