Texas Instruments DAC7716EVM manual

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Table of contents for the manual

  • Page 1

    User's Guide SBAU159 – October 2009 DAC7716EVM DAC7716EVM This user's guide describes the characteristics, operation, and use of the DAC7716EVM. The evaluation module (EVM) is an evaluation board that allows for quick and easy evaluation of the DAC7716 . The DAC7716 is a quad, high-accuracy, 12-bit R-2-R digital-to-analog converter (DAC[...]

  • Page 2

    EVM Overview www.ti.com Contents 1 EVM Overview ............................................................................................................... 2 2 Analog Interface ............................................................................................................. 3 3 Digital Interface .....................................[...]

  • Page 3

    www.ti.com Analog Interface 2 Analog Interface For maximum flexibility, the DAC7716EVM can interface to multiple analog sources. Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a 10-pin, dual-row, header at J1. This header provides access to the analog input and output pins of the DAC. Consult Samtec at http://www.samtec.com o[...]

  • Page 4

    Digital Interface www.ti.com 3.1 Serial Data Interface Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a 10-pin, dual-row, header/socket combination at J2. This header/socket provides access to the digital control and serial data pins from both J2A (top side) and J2B (bottom side) of the connector. Consult Samtec at http://www[...]

  • Page 5

    www.ti.com Power Supplies 4 Power Supplies Samtec part numbers SSW-105-22-F-D-VS-K and TSM-105-01-T-DV-P provide a 5-pin, dual-row, header/socket combination at J3. Table 3 lists the configuration details for J3. The voltage inputs to the DAC can be applied directly to the device. The DAC7716 requires multiple power supplies to operate. AVDD, AVSS,[...]

  • Page 6

    EVM Operation www.ti.com Note that if an external reference voltage is input to J1.20, it will be filtered through a first-order, low-pass RC filter. To input your own reference signal without this filter, connect the reference signal directly to TP1 or TP2. Figure 1 shows the reference test points on the EVM. Figure 1. Reference Test Points 6 EVM [...]

  • Page 7

    www.ti.com EVM Operation 6.3 Default Jumper Settings and Switch Positions Figure 2 shows the jumpers found on the EVM and the respective factory default conditions for each. Figure 2. DAC7716EVM Default Jumper Locations Jumper JP1 controls whether the LDAC signal is controlled by J2.15 or J2.17. By default, the LDAC signal is controlled by J2.17 bu[...]

  • Page 8

    Schematics and Layout www.ti.com Switch S1 allows the user to pull down four control signals to ground. LDAC, Uni/Bip B, RST, and Uni/Bip A can be pulled low using the switch. By default, switch position S1.1 is open, causing LDAC to be connected to ground. Switches S1.2 and S1.4 are open to short-circuit Uni/Bip A and Uni/Bip B to ground. This con[...]

  • Page 9

    www.ti.com Schematics and Layout space Table 4. DAC7716EVM Bill of Materials (1) Item No. Qty Ref Des Description Manufacturer Mfr Part Number 1 1 N/A Printed wiring board Texas Instruments 6508538 2 6 C1, C6, C10, Capacitor, ceramic 1.0µF 16V X5R TDK C1608X5R1C105K C11, C14, C15 10% 0603 3 7 C2, C3, C4, Capacitor, ceramic 10µF 25V X5R MuRata GRM[...]

  • Page 10

    1 2 3 4 5 6 A B C D 6 5 4 3 2 1 D C B A t i 5411 EAST WILLIAM S BO ULEV ARD, TUCSO N, AZ 857 11 USA TIT LE SHEET O F FILE SIZE DAT E R EV DRAWN BY ENGINE ER REVISIO N HIS TOR Y REV ENGI NEERI NG CHANG E NUMBE R APPRO VED B P RE C IS IO N A NA L O G P RO D U C TS HIGH -PERF ORM ANC E ANALO G D IVISION SEMI COND UCT OR G ROU P DOCU MENT CO NTRO L NO.[...]

  • Page 11

    Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling th[...]

  • Page 12

    IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders[...]