Texas Instruments ADS54J40EVM User manual

User's Guide
SLAU652A–October 2015–Revised January 2016
ADS54J40EVM
This user's guide describes the function and use of the ADS54J40 evaluation module. Included in this
document are a quick-start guide, instructions for optimizing evaluation results, software description,
alternate hardware configurations, and jumper, connector, and LED descriptions.
Contents
1 Overview...................................................................................................................... 2
1.1 Required Hardware................................................................................................. 2
1.2 Required Software.................................................................................................. 3
1.3 Evaluation Board Feature Identification Summary ............................................................. 3
1.4 References .......................................................................................................... 3
2 Quick Start Guide............................................................................................................ 4
2.1 Software Installation................................................................................................ 4
2.2 Hardware Setup Procedure ....................................................................................... 5
2.3 Software Setup Procedure......................................................................................... 6
2.4 Quick Start Trouble Shooting ..................................................................................... 9
3 Optimizing Evaluation Results............................................................................................ 10
3.1 Clocking Optimization............................................................................................. 10
3.2 Coherent Input Source............................................................................................ 10
3.3 HSDC Pro Settings................................................................................................ 10
4 Software Description....................................................................................................... 11
4.1 ADS54J40 EVM GUI.............................................................................................. 11
4.2 Low Level View.................................................................................................... 12
5 Alternate Hardware Configurations ...................................................................................... 13
5.1 Clocking Options .................................................................................................. 13
5.2 Analog Input Options ............................................................................................. 14
Appendix A Jumper, Connector, and LED Descriptions.................................................................... 15
List of Figures
1 EVM Feature Locations..................................................................................................... 3
2 Quick Start Test Setup...................................................................................................... 5
3 ADS54Jxx GUI Low Level View Tab...................................................................................... 7
4 HSDC Pro GUI Main Panel................................................................................................. 7
5 Channel 1 Data Capture Results from Quick Start Procedure......................................................... 8
6 ADS54Jxx GUI.............................................................................................................. 11
7 Low Level View Tab ....................................................................................................... 12
8 GUI CMOS Selection ...................................................................................................... 13
9 LMK04828 Clock Outputs Tab ........................................................................................... 14
List of Tables
1 Quick Start Performance Measurements................................................................................. 8
2 Troubleshooting Tips........................................................................................................ 9
3 HSDC Pro Settings to Optimize Results ................................................................................ 10
4 ADS54J40 GUI Tab Descriptions ........................................................................................ 11
5 Low Level View Controls.................................................................................................. 12
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Overview www.ti.com
6 Jumper Descriptions and Default Settings.............................................................................. 15
7 Connector Descriptions.................................................................................................... 15
8 LED Descriptions........................................................................................................... 16
1 Overview
The ADS54J40EVM is an evaluation module (EVM) designed to evaluate the ADS54J40 high-speed,
JESD204B interface ADCs. The EVM includes an onboard clocking solution (LMK04828), transformer-
coupled inputs, full power solution, and easy-to-use software GUI and USB interface.
The following features apply to this EVM:
• Transformer-coupled signal input network allowing a single-ended signal source from 0.4 MHz to 800
MHz
• LMK04828 system clock generator that generates field-programmable gate array (FPGA) reference
clocks for the high-speed serial interface and may be used to generate the ADC sampling clock
(default setting)
• Transformer-coupled clock input network to test the ADC performance with a very low-noise clock
source
• High-speed serial data output over a standard FPGA Mezzanine Card (FMC) interface connector
The ADS54J40EVM is designed to work seamlessly with the TSW14J56EVM, Texas Instruments’
JESD204B data capture/pattern generator card, through the High Speed Data Converter Pro (HSDC Pro)
software tool for high-speed data converter evaluation. The ADS54J40EVM was also designed to work
with many of the development kits from leading FPGA vendors that contain an FMC connector.
1.1 Required Hardware
The following equipment is included in the EVM evaluation kit:
• ADS54J40 Evaluation Board (EVM)
• Power supply cable
• Mini-USB cable
The following list of equipment are items that are not included in the EVM evaluation kit but are items
required for evaluation of this product in order to achieve the best performance:
• TSW14J56EVM Data Capture Board, two 5-V power supplies, and Mini-USB cable
• Computer running Microsoft®Windows®8, Windows 7, or Windows XP
• One Low-Noise Signal Generator. Recommendations:
– RF generator, > +17 dBm, < –40 dBc harmonics, < 500 fs jitter 20 kHz–20 MHz, 10-MHz to 2-GHz
frequency range
– Examples: TSW2170EVM, HP HP8644B, Rohde & Schwarz SMA100A
• Bandpass filter for desired analog input. Recommendations:
– Bandpass filter, ≥60-dB harmonic attenuation, ≤5% bandwidth, > +18-dBm power, < 5-dB insertion
loss
– Examples: Trilithic 5VH-series Tunable BPF, K&L BT-series Tunable BPF, TTE KC6 or KC7-series
Fixed BPF
• Signal path cables, SMA and/or BNC with BNC-to-SMA adapters
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+5-V Input Power
Connector
USB Connector
(Backside)
ADC Reset Switch
Channel B
Analog Input
External
ADC Clock
Input
Channel A
Analog Input
ADC
FMC
Connector
(Backside)
LMK04828
Reference
Input
www.ti.com Overview
1.2 Required Software
The following software is required to operate the ADS54J40EVM and available online. See References,
Section 1.4 for links.
• ADS54Jxx_EVM_GUI (Rev x)
The following software is required to operate the TSW14J56EVM and available online. See References,
Section 1.4 for links.
• High Speed Data Converter Pro software, version 4.1 or higher
• HSDC Pro GUI Updates (Rev. I) for High Speed Data Converter Pro Software, version 4.0 or lower
1.3 Evaluation Board Feature Identification Summary
The EVM features are labeled in Figure 1.
Figure 1. EVM Feature Locations
1.4 References
• ADS54J40EVM software, available at: www.ti.com/tool/ADS54J40EVM
• ADS54J40 datasheet (SBAS714), available at www.ti.com/product/ADS54J40
• LMK04828 datasheet (SNAS605), available at www.ti.com/product/lmk04828
• TSW14J56EVM User’s Guide (SLWU086), available at www.ti.com/tool/TSW14J56EVM
• High Speed Data Converter Pro software (SLWC107) and User's Guide (SLWU087), available at
www.ti.com/tool/dataconverterpro-sw
• HSDC Pro GUI Updates (SLWC106), available at www.ti.com/tool/dataconverterpro-sw
NOTE: Schematics, layout, and BOM are available on the ADS54J40EVM product page on
www.ti.com.
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Quick Start Guide www.ti.com
2 Quick Start Guide
This section guides the user through the EVM test procedure to obtain a valid data capture from the
ADS54J40EVM using the TSW14J56EVM capture card. This should be the starting point for all
evaluations.
2.1 Software Installation
The proper software must be installed before beginning evaluation. See Section 1.2 for a list of the
required software. The References section of this document contains links to find the software on the TI
website.
Important: The software must be installed before connecting the ADS54J40EVM and TSW14J56 to the
computer for the first time.
2.1.1 ADS54Jxx EVM GUI Installation
The ADS54Jxx EVM GUI is used to control the ADS54J40EVM. It must be used to properly configure the
devices on the EVM.
1. Download the ADS54Jxx EVM GUI from the TI website. The References section of this document
contains links to find the software on the TI website.
2. Extract the files from the zip file.
3. Run setup.exe and follow the installation prompts.
2.1.2 High Speed Data Converter Pro GUI Installation
High Speed Data Converter Pro (HSDC Pro) is used to control the TSW14J56EVM and analyze the
captured data. Please see the HSDC Pro user’s guide (SLWU087) for more information.
1. Download HSDC Pro from the TI website. The References section of this document contains the link to
find the software on the TI website.
2. Extract the files from the zip file.
3. Run setup.exe and follow the installation prompts.
4. If the version of HSDC Pro is 4.0 or lower, download HSDC Pro GUI Updates (Rev. I) from the TI
website. The References, Section 1.4 section of this document contains the link to find the software on
the TI website.
5. Extract the files from the zip file, run HSDC Pro Patch v4.00.10.exe and follow the installation
instructions.
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170 MHz, +15 dBm
Low-Noise
Power Supply
5 VDC @ 3 A
Power
Switch
TSW14J56EVM
PC Running
HSDC Pro
Mini-USB Cable
170-MHz
Bandpass
Filter
USB 3.0 Cable
ADS54J40
EVM
AINP
BINP
Analog Input
Low-Noise
Signal Generator
5-VDC Power Supply Cable
Low-Noise
Power Supply
5 VDC @ 3 A
www.ti.com Quick Start Guide
2.2 Hardware Setup Procedure
A typical test setup using the ADS54J40EVM and TSW14J56EVM is shown in Figure 2. This is the test
setup used for the quick start procedure. The rest of this section describes the hardware setup steps.
Figure 2. Quick Start Test Setup
2.2.1 TSW14J56EVM Setup
First, setup the TSW14J56EVM using the following steps:
1. Connect the ADS54J40EVM to the TSW14J56EVM using the FMC connectors.
2. Connect the included power supply cable to connector J11 (+5V IN) and the other end to a
+5 VDC ±0.3 VDC, 3-A power supply.
3. Connect the included USB cable between the host computer and USB connector (J9).
4. Turn on the power supply. Flip the power switch (SW6) to the ON position.
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2.2.2 ADS54J40EVM Setup
Next, setup the ADS54J40EVM using the following:
1. Connect the included 5-V power supply cable to connector J9 of the EVM. Connect the red wire to
+5 VDC ±0.3 VDC of a power supply rated for at least 3 A. Connect the black wire to GND of the
power supply.
2. Turn on the 5-VDC power supply. The power draw should be around 0.66 A. When the board is
configured, it will draw approximately 1.35 A.
3. Connect the included mini-USB cable to the USB connector J8, located on the backside of the board.
4. Set an analog input signal generator for 170 MHz, and about +15 dBm of power.
5. Place a narrow pass-band bandpass filter at the output of the signal generator to remove noise and
harmonics.
6. Connect the output of the filter to SMA connector AINP (J2) of the EVM.
2.3 Software Setup Procedure
The software can be opened and configured once the hardware is properly setup.
2.3.1 ADS54J40 GUI Configuration
1. Open the ADS54Jxx EVM GUI by going to Start Menu →All Programs →Texas Instruments ADCs →
ADS54Jxx EVM GUI.
2. Verify that the green USB Status indicator is lit in the top right corner of the GUI. If it is not lit, click the
Reconnect USB button and check the USB Status indicator again. If it is still not lit, then verify the EVM
is connected to the computer through the included mini-USB cable.
3. Click on the Low Level View tab then click the Load Config button.
4. Navigate to C:\Program Files(86)\Texas Instruments\ADS54Jxx EVM GUI\Configuration Files, select
the file called LMK_Config_Onboard_983p04_MSPS.cfg, then click OK. This programs the LMK04828
to provide a 983.04 MHz clock to the ADC.
5. Verify that the LMK04828 phase lock loop (PLL) is locked by checking that the PLL2 LOCKED LED
(D2) is lit.
6. Once the LMK04828 PLL is locked, press SW1 (ADC RESET) to provide a hardware reset to the ADC.
This switch is located in the middle of the EVM.
7. In the Low Level View tab, click Load Config. Select the file called ADS54J40_LMF_8224.cfg and click
OK. The ADS54J40EVM is now configured for no decimation and 8 JESD204B lanes.
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Figure 3. ADS54Jxx GUI Low Level View Tab
2.3.2 HSDC Pro GUI Configuration
1. Open High Speed Data Converter Pro by going to Start Menu →All Programs →Texas Instruments →
High Speed Data Converter Pro. The GUI main page looks as shown in Figure 4.
Figure 4. HSDC Pro GUI Main Panel
2. When prompted to select the capture board, select the TSW14J56 whose serial number corresponds
to the serial number on the TSW14J56EVM and click OK. This popup can be accessed through the
Instrument Options menu.
3. If no firmware is currently loaded, there is a message indicating this. Click on OK.
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4. Verify the ADC tab at the top of the GUI is selected.
5. Use the Select ADC drop-down menu at the top left corner to select ADS54J40_LMF_8224.
6. When prompted to update the firmware for the ADC, click Yes and wait for the firmware to download to
the TSW14J56. This takes about 3 seconds.
7. Enter “983.04M” into the ADC Output Data Rate field at the bottom left corner then click outside this
box or press return on the PC keyboard.
8. The GUI displays the new lane rate of the SerDes interface based off of the sample rate and other
parameters from the loaded configuration files. Click OK.
9. Click the Instrument Options menu at the top of HSDC Pro and select Reset Board.
10. Click Capture in HSDC Pro to capture data from the ADC.
11. The results from the captured data of Channel 1 should look like Figure 5 and the performance should
be similar to Table 1. If this result is not achieved, then see the Quick Start Troubleshooting section of
this document.
Figure 5. Channel 1 Data Capture Results from Quick Start Procedure
Table 1. Quick Start Performance Measurements
Result Measured Value Units
SNR 69.25 dBFS
SFDR 85.31 dBFS
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2.4 Quick Start Trouble Shooting
Use Table 2 to assist with problems that may have occurred during the quick start procedure.
Table 2. Troubleshooting Tips
Issue Troubleshooting Tips
General Problems Verify the test setup shown in Figure 2 and repeat the setup procedure as described in this
document.
Check power supplies to the EVMs. Verify that the power switches are in the ON position.
Check signal and clock connections to the EVM.
Check that all boards are properly connected together.
Try pressing the CPU_RESET button on the TSW14J56EVM.
Try power-cycling the external power supply to the EVM and reprogram the LMK and ADC
devices.
TSW14J56 LEDs are not correct: Verify the settings of the configuration switches on the TSW14J56EVM.
D1, D5 – N/A Verify that the EVM configuration GUI is communicating with the USB and that the
D2, D4 – Blinking configuration procedure has been followed.
D3, D6, D7 – OFF (LEDs Not Blinking) Reprogram the LMK device.
D8, D28 – ON Try pressing the CPU_RESET button on the TSW14J56EVM.
Try capturing data in HSDC Pro to force an LED status update.
Device GUI is not working properly Verify that the USB cable is plugged into the EVM and the PC.
Check the computer’s Device Manager and verify that a USB Serial Device is recognized
when the EVM is connected to the PC.
Verify that the green USB Status LED light in the top right corner of the GUI is lit. If it is not
lit, press Reconnect FTDI button.
Try restarting the configuration GUI.
Check default jumper connections as shown in Appendix A.
HSDC Pro Software is not Verify that the TSW14J56EVM is properly connected to the PC with an USB cable and that
capturing good data or analysis the board serial number is properly identified by the HSDC Pro software.
results are incorrect. Check that the proper ADC device is selected. In default conditions, ADS54J40_LMF_8224
should be selected.
Check that the analysis parameters are properly configured.
Check that the fundamental power is no larger than –1 dBFs.
HSDC Pro Software gives a Time- Try to reprogram the LMK device and reset the JESD204 link.
Out error when capturing data Verify that the ADC sampling rate is correct in the HSDC Pro software.
Sub-Optimal Measured Make sure an ADC hardware reset was issued after loading the LMK but before loading the
Performance ADC configuration file.
Check that the spectral analysis parameters are properly configured.
Verify that bandpass filters are used in the clock and input signal paths and that low-noise
signal sources are used.
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Optimizing Evaluation Results www.ti.com
3 Optimizing Evaluation Results
This section assists the user in optimizing the performance during evaluation of the product.
3.1 Clocking Optimization
The sampling clock provided to the ADC needs to have very low phase noise to achieve optimal results.
The default EVM configuration uses the LMK04828 clocking device to generate the sampling clock. There
are two options to improve the clock noise performance.
1. To achieve the best performance, the LMK04828 can be bypassed in favor of an externally provided
clock that is transformer-coupled to the ADC. The clock must have very low noise and must use an
external narrow pass-band filter to achieve optimal noise performance. The clock amplitude must be
within the datasheet limits. See Section 5 for more information regarding this setup.
2. The LMK04828 can be used as a clock distributor by using an external clock as the input to the
LMK04828. Filters should still be used on the clock to optimize the noise performance. See Section 5.2
for more information regarding this setup.
3.2 Coherent Input Source
ARectangular window function can be applied to the captured data when the sample rate and the input
frequency are set precisely to capture an integer number of cycles of the input frequency (sometimes
called coherent frequency). This may yield better SNR results. The clock and analog inputs must be
frequency-locked (such as through 10-MHz references) in order to achieve coherency.
3.3 HSDC Pro Settings
HSDC Pro has some settings that can help improve the performance measurements. These are
highlighted in Table 3.
Table 3. HSDC Pro Settings to Optimize Results
HSDC Pro Feature Description
Analysis Window (samples) Selects the number of samples to include in the selected test analysis. Collect more data to
improve frequency resolution of Fast-Fourier Transform (FFT) analysis. If more than 65,536
samples are required, the setting in the Data Capture Options needs to be increased to match this
value.
Data Windowing Function Select the desired windowing function applied to the data for FFT analysis. Select Blackman when
sampling a non-coherent input signal or Rectangle when sampling a coherent input signal.
Test Options →Notch Select bins to be removed from the spectrum and back-filled with the average noise level. May
Frequency Bins also customize which Harmonics/Spurs are considered in SNR and THD calculations and select
the method for calculating spur power.
Test Options →Bandwidth Enable markers to narrow the Single-Tone FFT test analysis to a specific bandwidth.
Integration Markers
Data Capture Options →Configure the number of contiguous samples per capture (capture depth). May also enable
Capture Options Continuous Capture and FFT Averaging.
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