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Texas Instruments AFE5801EVM Скачать руководство пользователя страница 15

Board Operation

When HP8644 or similar clock sources are not available, the on-board 40MHz clock is also a desirable
source. The jumpers P4, 5, 6 should be configured as

shows (i.e., default setup for

AFE5801EVM). In this mode, the transform-based differential clock is used.

3.6

Data Analysis

Based on the data file acquired by a logic analyzer, the performance of AFE5801 can be evaluated.

In Appendix A, we provide one solution (TI TSW1250 EVM) to analyze the data file using the PC.
Appendix B provides an alternate solution (TI TSW1100 software) to analyze the data file captured by a
logic analyzer. Coherent sampling is recommended if the input and sampling clock are phase locked. Due
to the frequency accuracy requirement of coherence sampling, two HP8644s for generating ADC clock
and analog signal are required. For most users, this may not be feasible. Data analysis based on
windowing is a more suitable approach.

15

SLOU257A

–

October 2009

–

Revised July 2011

AFE5801 8-Channel Variable Gain Amplifier (VGA) with Octal High-Speed ADC

Submit Documentation Feedback

Copyright

©

2009

–

2011, Texas Instruments Incorporated

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Содержание AFE5801EVM

Страница 1: ...ion 14 3 6 Data Analysis 15 4 Schematics Layout and Bill of Materials 16 4 1 Schematics 16 4 2 PCB Layout 22 4 3 Bill of Materials 30 5 Typical Performance 32 Appendix A TSW1250 for Evaluating AFE5801...

Страница 2: ...50EVM and AFE5801 33 30 Connection of the Instruments 33 31 AFE5801EVM GUI RUN Mode 34 32 AFE5801 EVM GUI START Button 35 33 AFE5801EVM GUI Variable Gain 36 34 AFE5801EVM GUI Setting Fixed Gain 37 35...

Страница 3: ...r ADSDeSer 50EVM or TSW1250EVM Communicate with PC through USB interface Power Management provides multiple power supplies for AFE5801 and other devices 1 3 Power Supplies The AFE5801EVM requires only...

Страница 4: ...w ti com Figure 1 AFE5801EVM LED Locations 4 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC SLOU257A October 2009 Revised July 2011 Submit Documentation Feedback Copyright 200...

Страница 5: ...and functionalities of inputs outputs jumpers test points of the AFE5801EVM in detail 2 1 Board Connections Overview Figure 2 AFE5801EVM TOP View Figure 3 AFE5801EVM BOTTOM View 5 SLOU257A October 20...

Страница 6: ...1 output or the on board 40MHz oscillator output depending on jumper P4 s connection External CLK Input J9 ADC Clock input such as FPGA outputs FPGA outputs must be processed by U1 Otherwise the ADC o...

Страница 7: ...tion Figure 4 Locations of Jumpers Headers and Switches on the AFE5801EVM 7 SLOU257A October 2009 Revised July 2011 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC Submit Docum...

Страница 8: ...40MHz clock Default is that the on board clock is used P6 Power on on board 40MHz clock generator Default is on P8 Debug port for monitoring ADS SPI signals P9 USB interface enable Default is on Regul...

Страница 9: ...the software 3 2 USB Driver Installation Connect the USB port of EVM to your PC If the driver has not been installed then the message Windows Found New Hardware will appear The Wizard as the following...

Страница 10: ...Windows XP is configured to warn when unsigned non WHQL certified drivers are about to be installed the following screen will be displayed unless installing a Microsoft WHQL certified Driver Click on...

Страница 11: ...reens appear displaying the different modes Figure 9 through Figure 11 Figure 9 AFE5801EVM USB SPI Interface for General Registers 11 SLOU257A October 2009 Revised July 2011 AFE5801 8 Channel Variable...

Страница 12: ...10 AFE5801EVM USB SPI Fixed Gain Mode 12 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC SLOU257A October 2009 Revised July 2011 Submit Documentation Feedback Copyright 2009 20...

Страница 13: ...are displays Users also can fill out Address Bytes and Data Bytes and press ENTER to configure each register Typical Configuration From Figure 9 press Init for TSW1250 button Select TAB TGC Register F...

Страница 14: ...H7 CH6 CH5 CH4 CH3 CH2 CH1 LCLK For example when an analog signal is input at CH1 on the AFE5801EVM the corresponding 12 bit digital output will be seen at CH8 on the ADSDeSER 50EVM when the AFE5801 i...

Страница 15: ...lyze the data file using the PC Appendix B provides an alternate solution TI TSW1100 software to analyze the data file captured by a logic analyzer Coherent sampling is recommended if the input and sa...

Страница 16: ...the schematics and layout of the AFE5801EVM as well as the bill of materials 4 1 Schematics Figure 14 Schematic Page 1 16 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC SLOU25...

Страница 17: ...of Materials Figure 15 Schematic Page 2 17 SLOU257A October 2009 Revised July 2011 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC Submit Documentation Feedback Copyright 2009...

Страница 18: ...ls www ti com Figure 16 Schematic Page 3 18 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC SLOU257A October 2009 Revised July 2011 Submit Documentation Feedback Copyright 2009...

Страница 19: ...of Materials Figure 17 Schematic Page 4 19 SLOU257A October 2009 Revised July 2011 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC Submit Documentation Feedback Copyright 2009...

Страница 20: ...ls www ti com Figure 18 Schematic Page 5 20 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC SLOU257A October 2009 Revised July 2011 Submit Documentation Feedback Copyright 2009...

Страница 21: ...1 www ti com Schematics Layout and Bill of Materials Figure 19 Schematic Page 6 21 SLOU257A October 2009 Revised July 2011 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC Submi...

Страница 22: ...er Layer 2 signal Inner Layer 3 power Inner Layer 4 ground Bottom Layer signal Top Silk Screen Layer Bottom Silk Screen Layer Figure 20 Top Layer Signal 22 AFE5801 8 Channel Variable Gain Amplifier VG...

Страница 23: ...f Materials Figure 21 Inner Layer 1 Ground 23 SLOU257A October 2009 Revised July 2011 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC Submit Documentation Feedback Copyright 20...

Страница 24: ...www ti com Figure 22 Inner Layer 2 Signal 24 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC SLOU257A October 2009 Revised July 2011 Submit Documentation Feedback Copyright 20...

Страница 25: ...of Materials Figure 23 Inner Layer 3 Power 25 SLOU257A October 2009 Revised July 2011 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC Submit Documentation Feedback Copyright 20...

Страница 26: ...www ti com Figure 24 Inner Layer 4 Ground 26 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC SLOU257A October 2009 Revised July 2011 Submit Documentation Feedback Copyright 20...

Страница 27: ...of Materials Figure 25 Bottom Layer Signal 27 SLOU257A October 2009 Revised July 2011 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC Submit Documentation Feedback Copyright 20...

Страница 28: ...www ti com Figure 26 Top Silk Screen Layer 28 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC SLOU257A October 2009 Revised July 2011 Submit Documentation Feedback Copyright 2...

Страница 29: ...Materials Figure 27 Bottom Silk Screen Layer 29 SLOU257A October 2009 Revised July 2011 AFE5801 8 Channel Variable Gain Amplifier VGA with Octal High Speed ADC Submit Documentation Feedback Copyright...

Страница 30: ...102SN1D L9 L20 Ferrite bead SMT 0402 1k 200 mA 18 Murata BLM18EG601SN1D L8 Ferrite bead SMT 0603 600 at 100 MHz 25 800 mA 19 Steward HI0805R800R 00 L1 L7 L21 L22 Ferrite SMT 0805 80 at 100 MHz 5 A L24...

Страница 31: ...5 47 Panasonic ERJ 2RKF3320X R1 R6 R16 Resistor SMT 0402 332 1 1 16W 48 Panasonic ERJ 2RKF49R9X R26 R27 R33 Resistor SMT 0402 49 9 1 1 16W 49 Panasonic ERJ 3GSYJ100 R78 Resistor SMT 0603 5 1 10W 10 50...

Страница 32: ...ical performance plot of the AFE5801 is shown in Figure 28 with 30dB digital gain setting Figure 28 Typical Performance of AFE5801 a Fixed Gain Mode b Variable Gain Mode 32 AFE5801 8 Channel Variable...

Страница 33: ...ng AFE5801 A 1 Introduction This application report goes through the steps of evaluating the AFE501 using the TSW1250EVM A 2 Hardware Setup Figure 29 Connection Between TSW1250EVM and AFE5801 Figure 3...

Страница 34: ...EVM USB SPI The GUI may be running if the following screen appears Figure 31 AFE5801EVM GUI RUN Mode In case the GUI is not running then press the START button of the GUI to run it 34 TSW1250 for Eval...

Страница 35: ...1 Click Init for TSW1250 to set the proper condition to work with TSW1250EVM 2 Go to TGC Register Tab 3 Press Variable button to change the mode to Fixed 35 SLOU257A October 2009 Revised July 2011 TS...

Страница 36: ...m Figure 33 AFE5801EVM GUI Variable Gain 4 Type 30 and press Write button 36 TSW1250 for Evaluating AFE5801 SLOU257A October 2009 Revised July 2011 Submit Documentation Feedback Copyright 2009 2011 Te...

Страница 37: ...following figure appears There are five groups of the GUI 1 Toolbar 2 Message Window 3 Device Specific Selections 4 Test Parameters 5 Central Pane and result data Items 1 3 and 4 are used to set up t...

Страница 38: ...e 35 User Interface Initial Setup Screen Test Condition Perform the steps in the order indicated in the following figure to set the test conditions Figure 36 User Interface Step by Step Setup After co...

Страница 39: ...t the Amplitude of the signal generator to 18 to 20 dBm input amplitude should be between 1dBFS to 3dbFS Set the Frequency of the Clock Generator to 40 MHz Set the Amplitude of the Clock Generator to...

Страница 40: ...t are entered in drop down menus or text input boxes on the left portion of the window Figure 39 User Interface Single FFT Format Time Domain The Time Domain test is shown in Figure 40 The larger cent...

Страница 41: ...nterface Time Domain Format EXCEL The raw test sampled data can be saved to a file and processed by EXCEL or some other software Figure 41 Plot of Saved Sample Data 41 SLOU257A October 2009 Revised Ju...

Страница 42: ...42 TSW1250 for Evaluating AFE5801 SLOU257A October 2009 Revised July 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated...

Страница 43: ...owing website http focus ti com docs toolsw folders print tsw1100 html Users can set the calculated frequencies for signal generators acquire ADC data through a logic analyzer and save the data as a t...

Страница 44: ...sed on your setup An example data file is listed below TSW1000 2 12 2007 12 38 Bits 12 Sampling Rate 40000000 000 Frequency in 1998291 0156 2s complement No Data Format Decimal Raw Captured Data 1981...

Страница 45: ...However some artifacts may be noticed during analysis Appropriate FFT window must be applied to the data Users could follow the steps described above to get the non windowed analysis results first as...

Страница 46: ...Analysis of Non Coherent Sampled Data a No window applied b Hanning window applied 46 TSW1100 for Evaluating AFE5801 SLOU257A October 2009 Revised July 2011 Submit Documentation Feedback Copyright 20...

Страница 47: ...uide 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 cont...

Страница 48: ...orized for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parti...

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