background image

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 the
product(s) must have electronics training and observe good engineering practice standards. As such, the goods being provided are
not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations,
including product safety and environmental measures typically found in end products that incorporate such semiconductor
components or circuit boards. This evaluation board/kit does not fall within the scope of the European Union directives regarding
electromagnetic compatibility, restricted substances (RoHS), recycling (WEEE), FCC, CE or UL, and therefore may not meet the
technical requirements of these directives or other related directives.

Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30
days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY
SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING
ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all
claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to
take any and all appropriate precautions with regard to electrostatic discharge.

EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER
FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive.

TI assumes no liability for applications assistance, customer product design, software performance, or infringement of
patents or services described herein.

Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the
product. This notice contains important safety information about temperatures and voltages. For additional information on TI’s
environmental and/or safety programs, please contact the TI application engineer or visit

www.ti.com/esh

.

No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or
combination in which such TI products or services might be or are used.

FCC Warning

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. It generates, uses, and
can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15
of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this
equipment in other environments may cause interference with radio communications, in which case the user at his own expense
will be required to take whatever measures may be required to correct this interference.

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

Copyright © 2007, Texas Instruments Incorporated

EVM WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the input voltage range of 1.8 V to 3.3 V and the output voltage range of 3.3 V max.

Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are
questions concerning the input range, please contact a TI field representative prior to connecting the input power.

Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the
EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load
specification, please contact a TI field representative.

During normal operation, some circuit components may have case temperatures greater than 60°C. The EVM is designed to
operate properly with certain components above 60°C as long as the input and output ranges are maintained. These components
include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of
devices can be identified using the 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 © 2007, Texas Instruments Incorporated

Содержание DAC5686 EVM

Страница 1: ...DAC5686 EVM User s Guide March 2007 Wireless Infrastructure Products SLWU006E...

Страница 2: ...2 SLWU006E December 2004 Revised March 2007 Submit Documentation Feedback...

Страница 3: ...86 EVM Initial Setup Tests 11 2 3 DAC5686 GUI Register Descriptions 13 3 Physical Description 15 3 1 PCB Layout 15 3 2 Parts List 19 4 Circuit Description 21 4 1 Input Clocks 21 4 2 Input Data 21 4 3...

Страница 4: ...ff 12 4 Spectrum with CLK2 320 MHz X4 Interpolation Single Sideband Mode and NCO Frequency 536870912 13 5 Top Layer 1 16 6 Layer 2 Ground Plane 17 7 Layer 3 Power Plane 18 8 Bottom Layer 19 9 Schemati...

Страница 5: ...EVM allows for different clock configurations The user can input a single ended differential ECL PECL or TTL CMOS level signal to be used to generate a single ended or differential clock source See Se...

Страница 6: ...rough RBIAS resistor R1 The DAC5686 output is enabled sleep mode disabled TXENABLE is set high to enable the DAC5686 device to process data Internal PLL disabled Jumper W3 is installed between pins 2...

Страница 7: ...cable to J1 on the EVM and skip steps 2 to 7 2 USB Interface Connect the provided USB to SPI adapter board to the parallel port connector on the EVM and to a spare USB port on the host PC using the s...

Страница 8: ...k and select Install from a list or specific location advanced Click Next 5 Select Search for the best driver in these locations and browse for the folder where the DAC5686 program was installed the d...

Страница 9: ...ing a Microsoft WHQL certified driver Click on Continue Anyway to continue with the installation If Windows XP is configured to ignore file signature warnings no message will appear 7 Windows should t...

Страница 10: ...re is a problem with the communication such as the EVM is not powered on or the parallel port cable is not connected an error message will be displayed instructing the user to correct the problem Once...

Страница 11: ...ovide a CLK2 input and disable the internal PLL W3 between pins 2 and 3 Do not provide parallel input data 2 Power up the EVM with 1 8 V DVDD and 3 3 V AVDD 3 Start the DAC5686_SPI software 4 Turn Ful...

Страница 12: ...TB In the case of CLK2 500 MHz the output spectrum should be similar to Figure 3 with a tone at 125 MHz This tone is being generated by the DAC5686 Fdac 4 Coarse Mixer as with no input data provided t...

Страница 13: ...lation Single Sideband Mode and NCO Frequency 536870912 6 Changing the NCO DDS to 268435456 232 20 320 will now result at an output tone at 20 MHz The following section provides a brief description of...

Страница 14: ...differential clocks are used to input the data to the chip CLK1 CLK1C is used to latch the input data into the chip and CLK2 CLK2C is used as the DAC sample clock NCO When set enables NCO in Single S...

Страница 15: ...error message will be displayed This chapter describes the physical characteristics and PCB layout of the EVM and lists the components used on the module The EVM is constructed on a 4 layer 6 5 inch...

Страница 16: ...www ti com Physical Description Figure 5 Top Layer 1 16 DAC5686 EVM SLWU006E December 2004 Revised March 2007 Submit Documentation Feedback...

Страница 17: ...www ti com Physical Description Figure 6 Layer 2 Ground Plane SLWU006E December 2004 Revised March 2007 DAC5686 EVM 17 Submit Documentation Feedback...

Страница 18: ...www ti com Physical Description Figure 7 Layer 3 Power Plane 18 DAC5686 EVM SLWU006E December 2004 Revised March 2007 Submit Documentation Feedback...

Страница 19: ...ti com 3 2 Parts List Physical Description Figure 8 Bottom Layer Table 1 lists the parts used in constructing the EVM SLWU006E December 2004 Revised March 2007 DAC5686 EVM 19 Submit Documentation Feed...

Страница 20: ...F10R0V Panasonic R3 R15 0 resistor 1 16 W 1 2 ERJ 3GEY0R00V Panasonic R23 R26 R24 R27 R33 49 9 resistor 1 16 W 1 3 ERJ 3EKF49R9V Panasonic R12 R13 R39 R40 127 resistor 1 16 W 1 1 ERJ 3EKF1270V Panason...

Страница 21: ...the clock source should feature very low jitter Using a clock with a 50 duty cycle gives optimum dynamic performance A 300 mVPP 0 V offset 50 duty cycle external square wave is applied to SMA connect...

Страница 22: ...ured to drive a doubly terminated 50 W cable or provide unbuffered differential outputs The factory set configuration of the demonstration board provides the user with single ended output signals at S...

Страница 23: ...pins 5 and 6 on header J15 The DAC5686 EVM provides a means of resetting the DAC5686 device Pressing switch S1 or sending J15 pin 29 low provides an active low reset signal to the DAC5686 device The D...

Страница 24: ...e output current IOUTFS is defined as follows where VEXTIO is the voltage at pin EXTIO This voltage is 1 2 V typical when using the internally provided bandgap reference voltage source The internal re...

Страница 25: ...www ti com 5 Schematic Schematic This chapter contains the DAC5686 EVM schematic diagrams SLWU006E December 2004 Revised March 2007 DAC5686 EVM 25 Submit Documentation Feedback...

Страница 26: ...0 Note 1 Note 1 Note 1 Note 1 IOUTB 3 3VA 3 3VA NOTE 1 DO NOT INSTALL 1 2 3 4 5 J2 SMA C25 1uF C26 10uF IOVDD CLK1C CLK1 CLK2 CLK2C SH 3 SH 3 SH 3 SH 3 PHSTR SH 2 SDO SDO SH 4 4 6 3 2 1 T2 T4 1 KK81...

Страница 27: ...14 A15 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 B14 B15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 J13 34PIN_IDC 1 2 3 4 5 6 7 8 9 10 11 12 13 14...

Страница 28: ...1 200 1 2 3 4 5 J3 SMA C19 01uF CLK1 CLK1 CLK1C CLK1 CLK1C R14 200 1 2 3 4 5 J4 SMA C20 01uF CLK2 CLK2 CLK2C CLK2 CLK2C DAC5686 B 3 5 J SETON Y DEWONCK 1 PART NOT INSTALLED NOTES 3 1 4 6 2 T4 TCM4 1W...

Страница 29: ...5 12 J1 DB25F RA R34 10K R35 10K R36 10K R37 10K R3 10 SDENB SCLK SDIO C21 1uF 3 3V_SER SDIO SCLK SDENB SH 1 SH 1 SH 1 OE1_ 1 1A1 2 1A2 4 1A3 6 1A4 8 2A1 11 2A2 13 2A3 15 2A4 17 GND 10 2Y4 3 2Y3 5 2Y2...

Страница 30: ...VDD FB2 C28 10uF C42 1uF C48 0 01uF C54 47 uF C30 10uF C43 1uF C49 0 01uF FB3 1 8VD VD J8 RED VD C55 47 uF 3 3VPLL FB5 C32 10uF C45 1uF C51 0 01uF C57 47 uF 3 3VCLK FB6 C35 10uF C46 1uF C52 0 01uF C58...

Страница 31: ...temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer or visit www ti com esh No license is granted under any pa...

Страница 32: ...iness practice TI is not responsible or liable for any such statements TI products are not authorized for use in safety critical applications such as life support where a failure of the TI product wou...

Отзывы: