DAC80004EVM

User's Guide SLAU689 – August 2016 DAC80004EVM DAC80004EVM This user's guide describes the characteristics, operation, and use of the DAC80004EVM. The evaluation model (EVM) is an evaluation board for the DAC80004. The DAC80004 is a low-power, buffered voltageoutput, 16-bit, quad channel digital-to-analog converter (DAC) with an integrated reference. This converter is controlled through a serial peripheral interface (SPI) that can operate at clock rates of up to 50 MHz. Additionally, the EVM includes a 2.5 V and a 5.5 V external reference voltages, resulting in an output ranges from 0 to 2.5 V and 0 to 5 V. The EVM allows evaluation of all aspects of the device and allows user control over every pin on the DAC80004. Complete circuit descriptions, schematic diagrams, and bill of material are included in this document. The following related documents are available for download through the Texas Instruments web site at http://www.ti.com. EVM-Related Device Datasheets Device Literature Number DAC80004 SLASE44 REF5025 SBOS410 REF5050 SBOS410 SLAU689 – August 2016 Submit Documentation Feedback DAC80004EVM Copyright © 2016, Texas Instruments Incorporated 1 www.ti.com 1 2 3 4 Contents EVM Overview ............................................................................................................... 3 1.1 Features .............................................................................................................. 3 1.2 Introduction .......................................................................................................... 3 1.3 Power and Motherboard Requirements .......................................................................... 3 1.4 EVM Default Hardware Setup ..................................................................................... 4 1.5 Questions and Support for This or Other Precision Data Converter EVMs ................................. 5 EVM Hardware ............................................................................................................... 6 2.1 Hardware Interface ................................................................................................. 6 2.2 Quick-Start ........................................................................................................... 6 EVM Operation ............................................................................................................... 7 3.1 DXP Software Installation.......................................................................................... 7 Schematic, PCB Layout, and Bill of Materials ........................................................................... 8 4.1 Schematic ............................................................................................................ 8 4.2 PCB Layout .......................................................................................................... 9 4.3 Bill of Materials .................................................................................................... 10 List of Figures 1 Default Jumper Settings for the DAC80004EVM ........................................................................ 5 2 EVM Software Link .......................................................................................................... 7 3 DAC80004EVM Schematic ................................................................................................. 8 4 PCB Layout ................................................................................................................... 9 List of Tables 1 Supply Voltage Ranges ..................................................................................................... 3 2 Default Jumper Settings for the MMB0 Modular EVM Motherboard .................................................. 4 3 Default Jumper Settings for the DAC80004EVM ........................................................................ 4 4 Hardware Description ....................................................................................................... 6 5 DAC80004EVM Bill of Materials.......................................................................................... 10 Trademarks All trademarks are the property of their respective owners. 2 DAC80004EVM SLAU689 – August 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated EVM Overview www.ti.com 1 EVM Overview 1.1 Features The DAC80004EVM has the following features: • Full-featured evaluation board for the DAC80004 • Onboard external reference selection • Wide selection of digital and I/O voltages • Hardware and software control logic • Compatible with the TI Modular EVM Motherboard MMB0 This manual covers the operation of the DAC80004EVM. The abbreviation EVM and the term evaluation module are synonymous with the DAC80004EVM. 1.2 Introduction The DAC80004 is a 16-bit, low-power, buffered voltage-output, dual channel digital-to-analog converter (DAC) that operates from a single 2.7-V to 5.5-V supply. The DAC is controlled through a serial peripheral interface (SPI) that can operate at clock rates of up to 50 MHz. The EVM is designed to highlight the features and the performance of the 16-bit DAC. Additionally, the EVM includes a 2.5-V and 5-V external references, resulting output ranges from 0 to 2.5 V or 5 V. The DAC80004EVM is designed to give the user easy access to all pins on the DAC80004. The evaluation module allows the user to control the DAC logic using onboard jumpers, or digitally through the J2 header. By default, the evaluation module is configured to be used with an onboard 2.5-V external reference, but can be easily modified to use the other 5-V external reference. 1.3 Power and Motherboard Requirements This DAC80004EVM board can be used as a standalone board or as a daughter card to the MMB0 Modular EVM motherboard. 1.3.1 Supply Voltage Ranges Table 1 lists the supply voltage ranges for the EVM. Table 1. Supply Voltage Ranges 1.3.2 Signal Range VDD 2.7 V to 5.5 V VREF_VIN 2.7 V to 15 V VREF_EXT 0 V to VDD Motherboard Supply Mode The MMB0 motherboard can supply the digital interface as well as the power supply voltage required by the DAC80004EVM. This user’s guide focuses on the motherboard supply mode and its software. 1.3.3 Standalone Supply Mode The DAC80004EVM can also be used without a motherboard, provided that the digital interface is driven by an external source. The supply voltage must be applied at TP1/VDD according to the specifications in Table 1. The MMB0 can still be used as a digital interface while using an external power supply. Remember to disconnect any shunt from JP1. SLAU689 – August 2016 Submit Documentation Feedback DAC80004EVM Copyright © 2016, Texas Instruments Incorporated 3 EVM Overview 1.3.4 www.ti.com Reference Voltage The EVM includes an on-board reference as well as the option to provide an external reference voltage. JP2 chooses between the on-board reference and the external reference. TP2 can be used to measure the selected reference, which is the on-board reference by default. 1.4 EVM Default Hardware Setup Table 2 lists the default jumper settings for the MMB0 modular EVM motherboard and Table 3 lists the default jumper settings for the DAC80004EVM. Table 2. Default Jumper Settings for the MMB0 Modular EVM Motherboard Jumper Position J12 CLOSED J13A OPEN J13B CLOSED Table 3. Default Jumper Settings for the DAC80004EVM 4 Jumper Position JP1 2-3 JP2 1-2 JP3 2-3 JP4 1-2 JP5 2-3 JP6 CLOSED JP7 OPEN DAC80004EVM SLAU689 – August 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated EVM Overview www.ti.com Figure 1 illustrates the default jumper settings for the DAC80004EVM. Figure 1. Default Jumper Settings for the DAC80004EVM 1.5 Questions and Support for This or Other Precision Data Converter EVMs Join TI's E2E precision data converter support forum at e2e.ti.com/support/data_converters/precision_data_converters Post your question in the forum and one of our experts will assist you. SLAU689 – August 2016 Submit Documentation Feedback DAC80004EVM Copyright © 2016, Texas Instruments Incorporated 5 EVM Hardware 2 www.ti.com EVM Hardware This section provides descriptions of the hardware interface and a quick-start guide. 2.1 Hardware Interface Table 4 provides hardware descriptions. Table 4. Hardware Description Jumper Default Position Description JP1 2-3 VDD selector. Selects between 5VA on J3A.3 and 3.3VD on J3A.9. JP2 1-2 VREF selector. Selects between the 2.5 V and 5 V on-board references. JP3 2-3 POR selector. Selects between the power-on state of the output. Default position powers-on to midscale, position 1-2 powers-on to zeroscale. JP4 1-2 SYNC selector. Selects the SYNC signal between J2.1 and J2.7. JP5 2-3 LDAC selector. Selects between an LDAC signal from J2A.15 and J2A.17. JP6 CLOSED LDAC GND tie. Selects between an LDAC signal from J2A with a pullup resistor and GND. JP7 OPEN CLR GND tie. Selects between a RST signal from J2A.19 with a pull-up resistor and GND. NOTE: For more details, view the Section 4.1. 2.2 Quick-Start This section explains a quick method to test the EVM's functionality without using a motherboard. The minimum requirements are: • An external source to provide the SPI master signals • An external 5-V power supply • A DC digital multimeter Use the following steps: 1. Ensure that all of the jumpers are in their default position. 2. Ensure that all the power supplies are switched off. 3. Connect the power supply ground to any of the ground leads on the EVM board. 4. Connect the SPI master ground to any of the ground leads on the EVM board. 5. Connect the DC DMM ground probe to any of the ground leads on the EVM board. 6. Connect 5 V to J3A.3. 7. Connect the DC DMM signal probe to J1A.8. 8. Power on the power supplies. 9. The DC DMM should display mid-scale 1.25 V. This means that the hardware setup is working. • If it does not, something may be wrong. Please check your connections and the jumper settings. 10. Send the SPI code 0x19FFFF using the DXP software. 11. The DC DMM should display full-scale 5 V. This means that your hardware and software setup are working. • If it does not, something may be wrong. Please check your digital interface implementation by looking at the digital signals on a signal analyzer or an oscilloscope. 6 DAC80004EVM SLAU689 – August 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated EVM Operation www.ti.com 3 EVM Operation 3.1 DXP Software Installation The DXP software required to use the DAC80004EVM with the MMB0 must be downloaded from the Texas Instruments website, available at www.ti.com/dxp. The software is listed under the “Software” category in this product folder, as shown in Figure 2. Figure 2. EVM Software Link Once the download is complete, run the executable file and follow the installer instructions. After the DXP software installs, copy the DAC80004.xml file into the “Devices” directory that the installer created. Typically located in ‘C:\Users\Public\Documents\DXP\Devices’. If you cannot find the “Devices” directory, go to the DXP install directory, typically “C:\Program Files\DXP” and open the file “DXP.ini”. Locate the line that starts with “DXPDevices”; it will contain the location of the “Devices” directory. SLAU689 – August 2016 Submit Documentation Feedback DAC80004EVM Copyright © 2016, Texas Instruments Incorporated 7 Schematic, PCB Layout, and Bill of Materials 4 www.ti.com Schematic, PCB Layout, and Bill of Materials This section contains the DAC80005EVM schematic, DAC80005EVM PCB layout, and the DAC80005EVM BOM. 4.1 Schematic Figure 3 illustrates the DAC80004EVM schematic. 3 Power TP1 VDD 1 3 5 7 9 +VA +5VA GND +1.8VD +3.3VD J3B Outputs VDD 2 1 -VA 2 -5VA 4 GND 6 VD1 8 +5VD 10 GND U1 JP1 J3A TP4 3 C1 C2 C3 C4 10µF 1µF 0.1µF 100pF GND GND LDAC SYNC CLR DIN SCLK GND VDD SDO 8 1 2 9 13 14 LDAC SYNC CLR SDIN SCLK VOUTB VOUTD VOUTC VOUTA 11 10 5 4 7 REFIN PAD GND 15 12 6 TP5 SDO J1A A0+ A1+ A2+ A3+ A4 A5 A6 A7 REFREF+ TP6 POR DAC80004IDMD 2 4 6 8 10 12 14 16 18 20 1 3 5 7 9 11 13 15 17 19 GND GND GND GND GND GND GND VCOM GND GND J1B GND GND POR Select Reference VDD VDD for midscale. 7 NC C5 1µF 8 1 VOUT TRIM/NR 5 TEMP 3 GND 4 DNC DNC 2 C6 1µF JP2 2 REF5050AID GND JP3 POR TP2 VREF 1 VIN +5VREF 6 3 2 3 U2 VDD C9 C10 10µF 1µF GND 1 GND GND for zero scale. U3 2 VIN C7 7 1µF 8 1 GND VOUT TRIM/NR 5 TEMP 3 NC DNC DNC GND +2.5VREF 6 GND C8 1µF 4 REF5025AID Digital I/O 1 GND VDD JP4 TP3 2 SYNC R4 10.0k CNTL CLKX CLKR FSX FSR DX DR *INT TOUT GPIO5 R5 10.0k R6 0 DNI DNP SCLK 1 1 3 5 7 9 11 13 15 17 19 LDAC JP5 R7 0 DNI DNP 2 DIN SDO CLR 3 2 4 6 8 10 12 14 16 18 20 3 J2A GPIO0 GND GPIO1 GPIO2 GND GPIO3 GPIO4 SCL GND SDA JP7 J2B GND JP6 2 1 2 1 GND Copyright © 2016, Texas Instruments Incorporated Figure 3. DAC80004EVM Schematic 8 DAC80004EVM SLAU689 – August 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Schematic, PCB Layout, and Bill of Materials www.ti.com 4.2 PCB Layout Figure 4 shows the DAC80004EVM PCB layout. Figure 4. PCB Layout SLAU689 – August 2016 Submit Documentation Feedback DAC80004EVM Copyright © 2016, Texas Instruments Incorporated 9 Schematic, PCB Layout, and Bill of Materials 4.3 www.ti.com Bill of Materials Table 5 lists the BOM for the DAC80004EVM. Table 5. DAC80004EVM Bill of Materials Designator 10 Description Manufacturer Part Number !PCB Qty 1 Printed Circuit Board Any xxxxxxx C1 1 CAP, CERM, 10uF, 25V, +/-20%, X5R, 0603 Murata GRM188R61E106MA73 C2, C5, C6, C7, C8, C10 6 CAP, CERM, 1uF, 25V, +/-10%, X5R, 0603 TDK C1608X5R1E105K080A C C3 1 CAP, CERM, 0.1uF, 50V, +/-10%, X7R, 0603 Kemet C0603C104K5RACTU C4 1 CAP, CERM, 100pF, 50V, +/-5%, C0G/NP0, 0603 Murata GRM1885C1H101JA01 D C9 1 CAP, TA, 10 µF, 16 V, +/- 10%, 0.8 ohm, SMD AVX TPSB106K016R0800 J1A, J2A 2 Header, 100mil, 10x2, SMD Samtec, Inc. TSM-110-01-T-DV-P J1B, J2B 2 Connector, Receptacle, 100mil, 10x2, Gold plated, SMD Samtec, Inc. SSW-110-22-F-D-VS-K J3A 1 Header, 100mil, 5x2, SMD Samtec, Inc. TSM-105-01-T-DV-P J3B 1 Connector, Header, 10-Pos (10x2), Receptacle, 100x100-mil Pitch Samtec, Inc. SSW-105-22-F-D-VS-K JP1, JP2, JP3, JP4, JP5 5 Header, TH, 100mil, 3x1, Gold plated, 230 mil above insulator Samtec, Inc. TSW-103-07-G-S JP6, JP7 2 Header, TH, 100mil, 2x1, Gold plated, 230 mil above insulator Samtec TSW-102-07-G-S R4, R5 2 RES, 10.0k ohm, 1%, 0.1W, 0603 Yageo America RC0603FR-0710KL R6, R7 2 RES, 0 ohm, 5%, 0.1W, 0603 Yageo America RC0603JR-070RL TP1, TP2 2 Test Point, Miniature, Red, TH Keystone 5000 TP3, TP4, TP5, TP6 4 Test Point, Miniature, Black, TH Keystone 5001 U1 1 QUAD 16-BIT, 1LSB INL, BUFFERED, VOLTAGE-OUTPUT DIGITAL-to-ANALOG CONVERTERS, DMD0014A Texas Instruments DAC80004IDMD U2 1 Low-Noise, Very Low Drift, Precision VOLTAGE REFERENCE, D0008A Texas Instruments REF5050AID U3 1 Low-Noise, Very Low Drift, Precision VOLTAGE REFERENCE, 2.5V, D008A Texas Instruments REF5025AID DAC80004EVM SLAU689 – August 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES Texas Instruments Incorporated (‘TI”) technical, application or other design advice, services or information, including, but not limited to, reference designs and materials relating to evaluation modules, (collectively, “TI Resources”) are intended to assist designers who are developing applications that incorporate TI products; by downloading, accessing or using any particular TI Resource in any way, you (individually or, if you are acting on behalf of a company, your company) agree to use it solely for this purpose and subject to the terms of this Notice. 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