Texas Instruments DAC124S085EVM User manual

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
1
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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 www.ti.com
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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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.
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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.
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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
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Figure 6. Driver Installed
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www.ti.com 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.
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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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www.ti.com 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).
(c) Click Write to send the command to the DAC124S085 part.
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4 Board Layout
Figure 10. Top Assembly Layer
Figure 11. Top Layer Routing
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