Texas Instruments DAC124S085EVM Manual de usuario

User's Guide

SNAU170–August 2014

DAC124S085EVM Booster Pack User’s Guide

This User’s Guide is for the DAC124S085EVM Booster Pack. All users looking for an EVM for the

DAC082S085, DAC102S085, DAC122S085, DAC084S085, DAC104S085, or DAC124S085 will have to

purchase this EVM instead.

Topic ........................................................................................................................... Page

1 DAC124S085 BoosterPack Components................................................................. 2

2 Software Installation............................................................................................. 3

3 DAC124S085 BoosterPack Setup and Operation...................................................... 7

4 Board Layout..................................................................................................... 10

5 Bill of Materials.................................................................................................. 14

SNAU170–August 2014 DAC124S085EVM Booster Pack User’s Guide

4.096-V Reference Voltage

LM4120 (U1)

DAC Output Connector (J1)

12-bit 4-Channel DAC

DAC124S085 (U2) MSP430 LaunchPad

Connector (JB, JD)

Voltage Reference

Select Jumper (JVA)

MSP430 LaunchPad

Connector (JA, JC)

DAC124S085 BoosterPack Components

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1 DAC124S085 BoosterPack Components

Figure 1. DAC124S085EVM Evaluation Board

Table 1. Device and Package Configurations

DEVICE IC PACKAGE

U1 LM4120IM5-4.1 SOT-23

U2 DAC124S085CIMM VSSOP-10

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Software Installation

2 Software Installation

2.1 Graphical User Interface (GUI)

To use the DAC124S085EVM install the DAC12xSxxx software:

1. The DAC12xSxxx software is located on the product page, scroll down to the software section, and

download the latest evaluation software.

2. Unzip the downloaded file into a known directory, and run the setup.exe file located in [Unzip location]\

DAC12xSxxx \EVM_GUI\ DAC12xSxxx _Installer_v1.zip\ DAC12xSxxx _Installer\Installer\Volume.

Follow the pop-screen instructions by clicking the Next button to install the software.

Figure 2. DAC12xSxxx Installation Directory

3. When the installation is finished, click Finish button.

SNAU170–August 2014 DAC124S085EVM Booster Pack User’s Guide

Software Installation

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2.2 LaunchPad Firmware Upgrade

The MSP430F5529 LaunchPad board can purchased at www.ti.com/tool/msp-exp430f5529lp.

2.2.1 MSP430 Firmware Upgrade Application Installation

1. Navigate to www.ti.com/tool/msp430usbdevpack, and click Get Software.

2. Scroll down to the end of the page to find the USB Collateral Installers section.

3. Click on MSP430_USB_Firmware_Upgrade_Example-x-x-x-Setup.exe to download the tool; the page

redirects to a submission form.

4. Complete the information requested and submit the form; if approved, a download button appears.

5. Run the installation file and follow the on-screen instructions until completion. When asked about the

setup type, select Application Only. Click Finish when done.

2.2.2 Firmware Upgrade

1. Open the MSP430 USB Firmware Upgrade application. By default, the application can be launched

from Start >> Programs >> Texas Instruments >> MSP430 USB Firmware Upgrade Example.

2. Click Next to proceed on the first prompt; read and accept the license agreement, and click Next to

continue.

Figure 3. USB Firmware Upgrade Window

3. Enable the Select Firmware button and browse to the downloaded firmware dac12xsxxx_fw-v0.87.txt.

4. Press the BSL button on the MSP430 LaunchPad and connect to the PC with a USB cable; if detected,

the text on the Firmware Upgrade tool will change from No device connected to Found 1 device.

5. Click the Upgrade Firmware button to program the LaunchPad. Close the application when done.

4DAC124S085EVM Booster Pack User’s Guide SNAU170–August 2014

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Software Installation

2.3 Update USB Driver

1. Before launching the DAC12xSxxx software, connect the DAC124S085EVM board to a USB port of

your PC. Go to Device Manager and find “MSP43-USB Example”. Right-click and select Update Driver

Software.

Figure 4. Driver Not Installed

2. On the next screen, select the Browse my computer for driver software option and go to the directory

of your install files and select the TI_ADC_DAC_EVMs_Driver.inf file.

3. If prompted with a warning window, select Install this Driver Anyway. Close the installation window

when it is done. The device manager should now display a TI_ADC_DAC_EVMs item followed by a

COM port number.

Figure 5. Driver Authentication Warning

SNAU170–August 2014 DAC124S085EVM Booster Pack User’s Guide

Software Installation

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Figure 6. Driver Installed

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DAC124S085 BoosterPack Setup and Operation

3 DAC124S085 BoosterPack Setup and Operation

3.1 Connections

1. Attach the DAC124S085EVM BoosterPack onto the MSP430 LaunchPad using connectors, JA, JB,

JC, and JD. The proper orientation of the LaunchPad and DAC124S085EVM is when the text

“LaunchPad” and “2013 TI” are in the same direction.

Figure 7. DAC124S085EVM Attached to MSP430

2. Connect the USB cable from the LaunchPad to the PC.

SNAU170–August 2014 DAC124S085EVM Booster Pack User’s Guide

DAC124S085 BoosterPack Setup and Operation

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3.2 Launching the Software

1. The DAC12xSxxx GUI software can be run by clicking on Start >> All Program >> DAC12xSxxx. After

running the GUI, select DAC124S085.

Figure 8. Part Select

2. GUI descriptions:

• DB[15:12]: These 4 bits control different channels and output modes. See the DAC124S085 data

sheet for more details.

• DB[11:0]: These 12 bits are for setting the DAC output codes.

• DB[11:0] output type: This field changes DB[11:0] to either binary, decimal, or hexadecimal type.

Figure 9. Selectable Fields in GUI

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DAC124S085 BoosterPack Setup and Operation

3. Quick start:

(a) Input 0000 to DB[15:12] to go into normal operation mode.

(b) Input 800 to DB[11:0] to output 2.048V (Vref/2).

SNAU170–August 2014 DAC124S085EVM Booster Pack User’s Guide

Board Layout

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4 Board Layout

Figure 10. Top Assembly Layer

Figure 11. Top Layer Routing

10 DAC124S085EVM Booster Pack User’s Guide SNAU170–August 2014

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