Texas Instruments DAC5687 EVM Скачать руководство пользователя страница 17 | Manualshive

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3.1

PCB Layout

Physical Description

The EVM is constructed on a 4-layer, 4.9-inch x 6.5-inch, 0.055-inch thick PCB using FR-4 material.

through

show the PCB layout for the EVM.

Figure 5. Top Layer 1

SLWU017B – APRIL 2005 – Revised March 2007

DAC5687 EVM

17

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Содержание DAC5687 EVM

Страница 1: ...DAC5687 EVM User s Guide March 2007 Wireless Infrastructure Products SLWU017B...

Страница 2: ...2 SLWU017B APRIL 2005 Revised March 2007 Submit Documentation Feedback...

Страница 3: ...al Setup Tests 11 2 3 DAC5687 GUI Register Descriptions 13 3 Physical Description 16 3 1 PCB Layout 17 3 2 Parts List 20 4 Circuit Description 22 4 1 Input Clocks 22 4 2 Input Data 22 4 3 Output Data...

Страница 4: ...ectrum with CLK2 500 MHz X4L Interpolation and NCO Frequency 343597383 12 4 DAC5687 Setup for X4 Mode and NCO Tone at FDAC 15 13 5 Top Layer 1 17 6 Layer 2 Ground Plane 18 7 Layer 3 Power Plane 19 8 B...

Страница 5: ...d referred to AVDD The EVM also allows for an option to double the output power by summing the DAC A and DAC B outputs through a 1 1 transformer The EVM allows the user to input single ended TTL CMOS...

Страница 6: ...istor R1 The DAC5687 output is enabled sleep mode disabled TxENABLE is set high to enable the DAC5687 device to process data A jumper is installed between pins 11 and 12 on J15 Internal PLL disabled J...

Страница 7: ...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 supplied USB cable The W...

Страница 8: ...ack 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 DAC5687 program was installed the...

Страница 9: ...lling 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...

Страница 10: ...ply click on the switches up down arrows etc to select the desired settings of the DAC5687 If there is a problem with the communication such as the EVM is not powered on or the parallel port cable is...

Страница 11: ...if the PLL is enabled W3 Do not provide parallel input data 2 Power up EVM with 1 8V DVDD and 3 3V AVDD 3 Start DAC5687_SPI software 4 Click on the Load Regs button on the GUI A new directory window w...

Страница 12: ...0 MSPS The output spectrum should be similar to Figure 3 Figure 3 Spectrum with CLK2 500 MHz X4L Interpolation and NCO Frequency 343597383 5 Change the Mode to 1000 FDAC 4 corresponding to FDAC 4 see...

Страница 13: ...s current GUI registers settings to a text file for future use Read All Reads the current registers of the DAC5687 This is used to verify settings on the front panel Send All Sends the current front p...

Страница 14: ...when PLL is disabled and dual clock mode is disabled When Lock cleared input data is latched into the chip on the rising edge of the PLLLOCK output pin When set input data is latched into the chip on...

Страница 15: ...ain A to a range 0 to 2047 See the data sheet for more information o QMC B Gain Sets QMC gain B to a range 0 to 2047 See the data sheet for more information o QMC Phase Sets QMC phase to a range 512 t...

Страница 16: ...eet for more information Pll Port Selection of this button will bring up a separate window that shows the Config parallel port configuration of the software The EVM Menu should be loaded with DAC EVM...

Страница 17: ...M is constructed on a 4 layer 4 9 inch x 6 5 inch 0 055 inch thick PCB using FR 4 material Figure 5 through Figure 8 show the PCB layout for the EVM Figure 5 Top Layer 1 SLWU017B APRIL 2005 Revised Ma...

Страница 18: ...www ti com Physical Description Figure 6 Layer 2 Ground Plane 18 DAC5687 EVM SLWU017B APRIL 2005 Revised March 2007 Submit Documentation Feedback...

Страница 19: ...www ti com Physical Description Figure 7 Layer 3 Power Plane SLWU017B APRIL 2005 Revised March 2007 DAC5687 EVM 19 Submit Documentation Feedback...

Страница 20: ...ti com 3 2 Parts List Physical Description Figure 8 Bottom Layer Table 1 lists the parts used in constructing the EVM DAC5687 EVM 20 SLWU017B APRIL 2005 Revised March 2007 Submit Documentation Feedba...

Страница 21: ...W 1 4 ERJ 3GEY0R00V Panasonic R23 R26 R38 R42 R6 R9 R24 R27 R33 49 9 resistor 1 16 W 1 3 ERJ 3EKF49R9V Panasonic R12 R13 R39 R40 110 resistor 1 10 W 1 0 ERA 3EKF110V Panasonic R18 200 resistor 1 16 W...

Страница 22: ...with a 50 duty cycle gives optimum dynamic performance With the EVM configured for external clock mode a 1 VPP 0 V offset 50 duty cycle external square wave is applied to SMA connector J4 to be used a...

Страница 23: ...ble or provide unbuffered differential outputs The factory set configuration of the demonstration board provides the user with single ended output signals at SMA connectors J5 and J19 The DAC5687 outp...

Страница 24: ...required setup and hold times The DAC5687 device has five discrete inputs to control the operation of the device The DAC5687 EVM provides a means of placing the DAC5687 device into a power down mode...

Страница 25: ...e full scale 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...

Страница 26: ...of DAC5687 SPI software 11 Figure 2 V2 3 17 AUG 05 A 12 Figure 3 Updated to reflect new initial test setup Updated to reflect new version of DAC5687 SPI software 14 Figure 4 V2 3 Updated to reflect ne...

Страница 27: ...e 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 3 3VA 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 4 6 3...

Страница 28: ...10 DB11 DB12 DB13 DB14 DB15 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 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 2...

Страница 29: ...3 Title SHEET OF SIZE DATE REV 14 Jul 2005 DOCUMENTCONTROL R11 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 DAC5687 B 3 5 J SET...

Страница 30: ...0K 1A 1 1Y 2 2A 3 2Y 4 3A 5 3Y 6 GND 7 4Y 8 4A 9 5Y 10 5A 11 6Y 12 6A 13 VCC 14 U2 SN74HCT14 1A 1 1Y 2 2A 3 2Y 4 3A 5 3Y 6 GND 7 4Y 8 4A 9 5Y 10 5A 11 6Y 12 6A 13 VCC 14 U3 SN74HCT14 R3 10 SDENB SCLK...

Страница 31: ...BLACK TP4 BLACK C53 47 uF DAC5687 B 5 5 J SETON Y DEWONCK IOVDD 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...

Страница 32: ...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 33: ...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...

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