Texas Instruments DAC8775EVM User Manual
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Texas Instruments DAC8775EVM User Manual

Texas Instruments DAC8775EVM User Manual

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This user's guide describes the characteristics and use of the DAC8775 evaluation board (EVM). It also
discusses how to setup and configure the software and hardware for proper operation. Throughout this
document, the terms DAC8775EVM, evaluation board, evaluation module, and EVM are synonymous with
the DAC8775EVM.
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SBAU248 - November 2016
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Copyright © 2016, Texas Instruments Incorporated
DAC8775EVM User's Guide
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User's Guide
SBAU248 - November 2016
DAC8775EVM User's Guide
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Summary of Contents for Texas Instruments DAC8775EVM

  • Page 1: Table Of Contents

    This user’s guide describes the characteristics and use of the DAC8775 evaluation board (EVM). It also discusses how to setup and configure the software and hardware for proper operation. Throughout this document, the terms DAC8775EVM, evaluation board, evaluation module, and EVM are synonymous with the DAC8775EVM.

  • Page 2: Overview

    The following documents provide information regarding Texas Instruments integrated circuits used in the assembly of the DAC8775EVM. This user’s guide is available from the TI website under the literature number SBAU248. Any letter appended to the literature number corresponds to the document revision that is current at the time of the writing of this document.

  • Page 3: Evm Hardware Overview

    EVM board. Connectors on the EVM board allow the user to connect the required external power supplies for the configuration under test. The SM-USB-DIG must be connected to the DAC8775EVM with the Texas Instruments logo facing up. Power Supply...

  • Page 4: Evm Jumper Summary

    Unloads VOUTA/IOUTA of the 250-Ω resistor Installed Loads VOUTA/IOUTA with a 625-Ω resistor JP20 Not installed Not installed Unloads VOUTA/IOUTA of the 625-Ω resistor DAC8775EVM User’s Guide SBAU248 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 5 When HARTIN_C is in use, disconnect from GND Installed When HARTIN_D is not in use, AC couple to GND JP43 Installed Not installed When HARTIN_D is in use, disconnect from GND SBAU248 – November 2016 DAC8775EVM User’s Guide Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 6: Pvdd/Avdd, Avss, And Dvdd Supply Connections

    PVDD_X/AVDD Supply The PVDD_X, the buck-boost converter supplies, and AVDD, the analog supply, of the DAC8775 are connected to the same power net labeled PVDD/AVDD on the DAC8775EVM. Terminal block J2, shown Figure 3, allows for external voltage sources to be connected to the PVDD/AVDD supply. The PVDD/AVDD supply must be provided regardless of whether the buck-boost converter is in use or not.

  • Page 7: Digital Communication Test Points

    USB-DIG platform is not used, DVDD must be configured to use the DAC8775 internal DVDD LDO or external supplies as described in Section 2.4.3. SBAU248 – November 2016 DAC8775EVM User’s Guide Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 8: Onboard Reference Supply Connections

    JP10 in the 2-3 position and connect a supply voltage for the REF5050 to J9, as shown in Figure 5. To use an external reference voltage, remove JP10 and the reference can be connected to the DAC8775EVM through the center post of JP10. 2.5.3 VOUT_X, VSENSEP_X, and VSENSEN_X The VOUT_X pins can be access on terminal blocks J5, J6, J7, and J8 or by the OUT_A, OUT_B, OUT_C, or OUT_D test points.

  • Page 9: Output Terminal Block Connections And Load Jumpers

    Connecting the SM-USB-DIG To connect the EVM board and the SM-USB-DIG platform together, firmly slide the male and female ends of the 10-pin connectors together with the Texas Instruments logo of the SM-USB-DIG facing up as shown Figure 7. Make sure that the two connectors are completely pushed together as loose connections may cause intermittent operation.

  • Page 10: Evm Software Setup

    To install the software, locate and extract the file named DAC8775.zip to a specific folder (for example, C:\DAC8775\) on the hard drive. Figure 8. DAC8775EVM Installer DAC8775EVM User’s Guide SBAU248 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 11: Dac8775Evm Install Path

    After selecting the installation directory, two license agreements are presented that must be accepted. Figure 10. DAC8775EVM Software License Agreements After accepting the Texas Instruments and National Instruments license agreements, the progress bar opens and shows the installation of the software. Once the installation process is completed, click Finish.

  • Page 12: Evm Software Overview

    The EVM software can be operated through the Windows start menu. From the start menu, select All Programs, and then select DAC8775EVM. An error will appear if the PC cannot communicate with the EVM. If this error happens, first ensure that the USB cable is properly connected on both ends.
  • Page 13 HART Inputs The enable HART signals to be coupled to the current outputs through the onboard coupling path the HART-Enable Boolean control must be checked. SBAU248 – November 2016 DAC8775EVM User’s Guide Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 14 When Buck-Boost Mode is set to Clamp Mode, the positive clamp and negative clamp controls are used to set each arm’s output clamp. DAC8775EVM User’s Guide SBAU248 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 15: Evm Documentation

    EVM Documentation www.ti.com EVM Documentation This section contains the complete bill of materials and schematic diagram for the DAC8775EVM. Documentation information for the SDM-USB-DIG Platform can be found in the SDM-USB-DIG Platform User’s Guide (SBOU136) available at www.TI.com. EVM Board Schematic...

  • Page 16: Dc-Dc Schematic

    VPOS_C VNEG_C VPOS_D VNEG_D PVDD/AVDD PVDD/AVDD 100µH 1µF 100µH 1µF 10µF 10µF 1µF 1µF 1µF 1µF Copyright © 2016, Texas Instruments Incorporated Figure 13. DC-DC Schematic BAV99-7-F BAV99-7-F JP16 VPOS_A VNEG_A JP17 VPOS_B VNEG_B VSENSEP_A VSENSEP_B 1µF 1µF 1µF 1µF...

  • Page 17: Dac8775Evm Pcb Components Layout

    EVM Documentation www.ti.com EVM PCB Components Layout Figure 15 shows the layout of the components for the EVM board. Figure 15. DAC8775EVM PCB Components Layout SBAU248 – November 2016 DAC8775EVM User’s Guide Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 18: Evm Board Bill Of Materials

    RES, 10.0 ohm, 1%, 0.1W, R1, R2, R3, R4, R5, R6, R7, R8 CRCW060310R0FKEA Vishay-Dale 0603 RES, 10k ohm, 5%, 0.1W, R9, R10 CRCW060310K0JNEA Vishay-Dale 0603 DAC8775EVM User’s Guide SBAU248 – November 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...
  • Page 19 Management, RMP0072A Low-Noise, Very Low Drift, Precision Voltage Reference, REF5050IDGK Texas Instruments DGK0008A Low-Noise, Very Low Drift, Precision Voltage Reference, REF5050IDGK Texas Instruments DGK0008A SBAU248 – November 2016 DAC8775EVM User’s Guide Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated...

  • Page 20: Important Notice

    IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue.

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