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Texas Instruments DAC5674 EVM User Manual

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DAC5674 EVM
User's Guide
September 2003
Wireless Infrastructure Products
SWRU007

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Summary of Contents for Texas Instruments DAC5674 EVM

  • Page 1 DAC5674 EVM User’s Guide September 2003 Wireless Infrastructure Products SWRU007...
  • Page 2 TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. Following are URLs where you can obtain information on other Texas Instruments products and application solutions:...
  • Page 3 EVM IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product incorporating the goods.
  • Page 4 EVM schematic located in the EVM User’s Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright  2003, Texas Instruments Incorporated...

  • Page 5: Table Of Contents

    ............DAC5674 EVM Operational Procedure .
  • Page 6 Contents Figures 2−1 Top Layer 1 ..............2−2 Ground Plane .

  • Page 7: Overview

    ......... . DAC5674 EVM Operational Procedure .

  • Page 8: Purpose

    Purpose 1.1 Purpose The DAC5674 EVM provides a platform for evaluating the DAC5674 digital-to-analog converter (DAC) under various signal, reference, and supply conditions. This document should be used in combination with the EVM schematic diagram supplied. 1.2 EVM Basic Functions Digital inputs to the DAC can be provided with CMOS level signals up to 200 MSPS through a 40-pin header.

  • Page 9: Dac5674 Evm Operational Procedure

    DAC5674 EVM Operational Procedure 1.4 DAC5674 EVM Operational Procedure The DAC5674 EVM can be set up in a variety of configurations to accommodate a specific mode of operation. Before starting evaluation, the user should decide on the configuration and make the appropriate connections or changes.

  • Page 11: Pcb Layout And Parts List

    Chapter 2 PCB Layout and Parts List This chapter describes the physical characteristics and PCB layout of the EVM and lists the components used on the module. Topic Page PCB Layout ..........Parts List .

  • Page 12: 2.1 Pcb Layout

    PCB Layout 2.1 PCB Layout The EVM is constructed on a 4-layer, 3.3-inch × 5.75-inch, 0.062-inch thick PCB using FR-4 material. Figure 2−1 through Figure 2−4 show the PCB layout for the EVM. Figure 2−1. Top Layer 1...

  • Page 13: Ground Plane

    PCB Layout Figure 2−2. Layer 2, Ground Plane Figure 2−3. Layer 3, Power Plane PCB Layout and Parts List...

  • Page 14: Bottom Layer

    PCB Layout Figure 2−4. Bottom Layer...

  • Page 15: Parts List

    Parts List 2.2 Parts List Table 2−1 lists the parts used in constructing the EVM. Table 2−1. DAC5674 EVM Parts List Ref. Des. Installed Not Installed Description Qty. Part Number Mfg. 22-pF, 50-V, 5% capacitor 06035A220JAT2A C20, C21 100-pF, 50-V, 5% capacitor...
  • Page 16 Parts List Table 2−1. DAC5674 EVM Parts List (Continued) Ref. Des. Installed Not Installed Description Qty. Part Number Mfg. SW-PB switch EVQ-PJX04M Panasonic Switch SD05HOSK SMA connectors 713-4339 Allied J2, J4, J7 J1, J3, J5, J6 (901-144-8RFX) SN74LVC04A SN74LVC04APW Standoff, hex (1/4 × 1”)

  • Page 17: Circuit Description

    Chapter 3 Circuit Description This chapter provides descriptions of the primary functional circuits on the DAC5674 EVM. Topic Page Circuit Function ..........

  • Page 18: Circuit Function

    3.1.1 Input Clock The DAC5674 EVM default operation setting is with a differential input clock sent to the DAC5674. A 500-mV p-p, 0-V offset, 50% duty-cycle external sinewave is applied to SMA connector J4 and converted to a differential clock input to the DAC5674 by transformer T2.

  • Page 19: Output Data

    CMOS data bit 7 CMOS data bit 0 (LSB) 3.1.3 Output Data The DAC5674 EVM can be configured to drive a doubly terminated 50-Ω cable or provide unbuffered differential outputs. 3.1.3.1 Transformer Coupled Signal Output The factory-set configuration of the demonstration board provides the user with a single-ended output signal at SMA connector J7.

  • Page 20: Internal Reference Operation

    (see the DAC5674 data sheet (SLWS148) for details). 3.1.6 Sleep Mode The DAC5674 EVM provides a means of placing the DAC5674 into a power-down mode. This mode is activated by placing jumper W3 between pins 2 and 3. 3.1.7...

  • Page 21: Schematics

    Chapter 4 Schematics This chapter contains the EVM schematic diagrams. Schematics...
  • Page 22 Revision History ECN Number Approved (Note 1) +3.3VA +1.8_3.3VD +3.3VA (Note 1) (Note 1) 10PIN_SIP_RPACK (Note 1) I_OUT .1uF .1uF T1-1T-KK81 (Note 1) (Note 1) (Note 1) +1.8VD 49.9 49.9 SCLK 22pF 22pF .1uF (Note 1) +3.3VA .1uF .1uF .1uF 200, 1% +1.8_3.3VD .01uF...
  • Page 23 +3.3V ANALOG +3.3V CLOCK +3.3VA +3.3VCLK VCLK FERRITE FERRITE + C30 + C31 47 uF 47 uF .1uF .01uF .1uF .01uF 10uF 10uF BLACK BLACK 1.8V / +3.3V DIGITAL +1.8VD +1.8_3.3VD +1.8VD 18VD FERRITE FERRITE + C32 + C33 47 uF 47 uF 10uF .1uF...
  • Page 24 +1.8_3.3VD 10_SM_SWITCH DIV1 (Sh 1) DIV1 +3.3VCLK DIV0 .1uF (Sh 1) DIV0 (Note 1) (Sh 1) 49.9 49.9 (Note 1) 49.9 (Sh 1) (Note 1) (Note 1) SCLK (Sh 1) (Sh 1) SCLK 49.9 (Note 1) +3.3VCLK (Note 1) .01uF INPUT CLOCK SN74LVC04A GREEN...

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