Texas Instruments ADS5296A User manual

User's Guide
SLAU537–October 2013
ADS5296A, 4-Channel 200-MSPS, and 8-Channel 80-MSPS,
Analog-to-Digital Converter Evaluation Module
This user’s guide gives a general overview of the ADS5296A evaluation module (EVM) and provides a
general description of the features and functions to be considered while using this module. This manual is
applicable to the ADS5296A analog-to-digital converters (ADC). The ADS5296A EVM provides a platform
for evaluating the ADC under various signal, clock, reference, and ADC output formats.
Contents
1 Quick View of Evaluation Setup ........................................................................................... 4
2 GUI Software Installation .................................................................................................. 5
2.1 TSW1400 EVM GUI Installation (High Speed Data Converter Pro (HSDCpro)) .......................... 5
2.2 ADS5296A EVM GUI Installation ............................................................................... 10
3 Hardware and EVM Setup for Testing ADS5296A .................................................................... 14
3.1 External Connections ............................................................................................ 14
3.2 ADS5296A EVM Header Configuration ....................................................................... 15
3.3 ADS5296A EVM 0-ΩJumper Configuration .................................................................. 17
4 Testing ADS5296A EVM ................................................................................................. 19
4.1 TSW1400 and ADS5296 GUI Setup ........................................................................... 19
4.2 Capturing a RAMP Test Pattern ................................................................................ 24
4.3 Capturing Sinusoidal Input in Octal Non-Interleaving Mode ................................................ 28
4.4 Capturing Sinusoidal Input in Quad Interleaving Mode ...................................................... 35
5 ADS5296 GUI in Detail ................................................................................................... 38
5.1 Read Me First Tab ............................................................................................... 39
5.2 Top Level Tab ..................................................................................................... 41
5.3 Test Pattern Tab .................................................................................................. 45
5.4 Digital Signal Processing Tab ................................................................................... 46
5.5 Channel Filter Tab ................................................................................................ 49
6 ADS5296A EVM Schematics ............................................................................................ 54
7 ADS5296A EVM Bill of Materials ........................................................................................ 63
8 ADS5296A EVM Layout .................................................................................................. 65
List of Figures
1 Evaluation Setup............................................................................................................ 4
2 HSDCpro Install (a)......................................................................................................... 5
3 HSDCpro Install (b)......................................................................................................... 6
4 HSDCpro Install (c) ......................................................................................................... 6
5 HSDCpro Install (d) 80 ..................................................................................................... 7
6 HSDCpro Install (e)......................................................................................................... 7
7 HSDCpro Install (f).......................................................................................................... 8
8 HSDCpro Install (g)......................................................................................................... 8
9 HSDCpro Install (h)......................................................................................................... 9
10 HSDCpro Install (i).......................................................................................................... 9
11 ADS5296 GUI Install (a).................................................................................................. 10
12 ADS5296 GUI Install (b).................................................................................................. 10
13 ADS5296 GUI Install (c).................................................................................................. 11
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14 ADS5296 GUI Install (d).................................................................................................. 11
15 ADS5296 GUI Install (e).................................................................................................. 12
16 ADS5296 GUI Install (f)................................................................................................... 12
17 ADS5296 GUI Install (g).................................................................................................. 13
18 TSW1400 and ADS5296A EVM Setup................................................................................. 14
19 ADS5296A EVM Default Header Configuration ....................................................................... 16
20 ADS5296A EVM Octal Non-Interleaving Mode Analog Input SMAs................................................ 17
21 ADS5296A EVM Quad Interleaving Mode Analog Input SMAs ..................................................... 18
22 TSW1400 GUI Setup (a) ................................................................................................. 19
23 TSW1400 GUI Setup (b) ................................................................................................. 20
24 TSW1400 GUI Setup (c).................................................................................................. 20
25 TSW1400 GUI Setup (d) ................................................................................................. 21
26 TSW1400 GUI Setup (e) ................................................................................................. 21
27 TSW1400 GUI Setup (f) .................................................................................................. 21
28 ADS5296 Plug-in GUI Setup (a)......................................................................................... 22
29 ADS5296 Plug-in GUI Setup (b)......................................................................................... 22
30 ADS5296 Plug-in GUI Setup (c)......................................................................................... 23
31 ADS5296 GUI Setup for RAMP Test ................................................................................... 24
32 HSDCpro GUI Setup for RAMP Test ................................................................................... 25
33 RAMP Capture............................................................................................................. 26
34 RAMP Capture by Channel .............................................................................................. 27
35 Zoom on RAMP Capture ................................................................................................. 27
36 Jumper J35 and J38 positions for Enabled XTAL (default).......................................................... 28
37 Jumper J35 and J38 positions for Disabled XTAL.................................................................... 29
38 Octal Non-interleaving Mode Hardware Setup ........................................................................ 30
39 ADS5296 GUI Setup for Octal Non-Interleaving Mode............................................................... 30
40 HSDCpro GUI Setup for Octal Non-Interleaving Mode (b)........................................................... 31
41 Octal Non-Interleaving Mode Capture 1................................................................................ 32
42 Octal Non-Interleaving Mode Capture 2................................................................................ 32
43 Octal Non-Interleaving Mode Capture 3................................................................................ 33
44 HSDCpro Software Filtering.............................................................................................. 33
45 HSDCpro Software Filtering Menu...................................................................................... 34
46 HSDCpro Capture with Software Filtering.............................................................................. 34
47 Quad-Interleaving Mode Hardware Setup.............................................................................. 35
48 Quad-Interleaving Mode GUI Setup .................................................................................... 36
49 Quad-Interleaving Mode Capture 1 ..................................................................................... 36
50 Quad-Interleaving Mode Capture 2 ..................................................................................... 37
51 Quad-Interleaving Mode Fs/2 - Fin Software Filtering................................................................ 38
52 ADS5296 GUI Simulation Mode......................................................................................... 39
53 ADS5296 GUI Simulation Mode Checkbox Indicator................................................................. 39
54 RECORD/PLAYBACK COMMAND SEQUENCE (a) ................................................................. 40
55 RECORD/PLAYBACK COMMAND SEQUENCE (b) ................................................................. 40
56 RECORD/PLAYBACK COMMAND SEQUENCE (c) ................................................................. 41
57 DIGITAL WAVEFORM GRAPH-WRITE................................................................................ 41
58 EN_SER_BIT Drop-Down Menu ........................................................................................ 42
59 EN_SER_BIT Info Button................................................................................................. 43
60 GENERAL SETUP Section of Top Level Tab ......................................................................... 44
61 Custom WRITE/READ Example......................................................................................... 44
62 Test Pattern Tab........................................................................................................... 45
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63 PRBS Section Enabled................................................................................................... 45
64 TEST PATTERN MODES Section ..................................................................................... 46
65 Digital Signal Processing Tab............................................................................................ 46
66 Digital Signal Processing Tab............................................................................................ 47
67 Channel Averaging Info Button.......................................................................................... 47
68 INPUT/OUTPUT MAPPING with EN_INTERLEAVE = 0............................................................. 48
69 INPUT/OUTPUT MAPPING with EN_INTERLEAVE = 1 ............................................................ 48
70 Channel Filter Tab......................................................................................................... 49
71 EN_DIG_FILTER = 1 ..................................................................................................... 49
72 Channel 5 High Pass Filter Enabled.................................................................................... 50
73 Channel 1 Digital Filter Enabled......................................................................................... 50
74 Channel 1 Pre-Stored Digital Filter Enabled........................................................................... 51
75 Channel 1 Custom Digital Filter Enabled............................................................................... 51
76 Reset Channels on Channel Filter Tab................................................................................. 52
77 Save/Load Custom Filter Coeffs on Channel Filter Tab.............................................................. 52
78 View Filter Coeffs.......................................................................................................... 53
79 ADS5296A Schematic, Sheet 1 of 9.................................................................................... 54
80 ADS5296A Schematic, Sheet 2 of 9.................................................................................... 55
81 ADS5296A Schematic, Sheet 3 of 9.................................................................................... 56
82 ADS5296A Schematic, Sheet 4 of 9.................................................................................... 57
83 ADS5296A Schematic, Sheet 5 of 9.................................................................................... 58
84 ADS5296A Schematic, Sheet 6 of 9.................................................................................... 59
85 ADS5296A Schematic, Sheet 7 of 9.................................................................................... 60
86 ADS5296A Schematic, Sheet 8 of 9.................................................................................... 61
87 ADS5296A Schematic, Sheet 9 of 9.................................................................................... 62
88 ADS5296A EVM Top Layer Assembly Drawing – Top View ........................................................ 65
89 ADS5296A EVM Bottom Layer Assembly Drawing – Bottom View................................................. 66
90 ADS5296A EVM Top Side ............................................................................................... 67
91 ADS5296A EVM Ground Plane ......................................................................................... 68
92 ADS5296A EVM Signal Plane........................................................................................... 69
93 ADS5296A EVM Bottom Side ........................................................................................... 70
List of Tables
1 ADS5296A EVM Header Configuration ................................................................................ 15
2 ADS5296A EVM Bill of Materials........................................................................................ 63
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1 Quick View of Evaluation Setup
Figure 1 is an overview of the evaluation setup that includes the ADS5296A EVM, TSW1400 data
capturing card, external equipment, personal computer (PC), and software requirements.
Figure 1. Evaluation Setup
TSW1400 EVM: The high-speed LVDS deserializer board is required for capturing data from the
ADS5296A EVM and its analysis using the TSW1400 graphical user interface (GUI), called High Speed
Data Converter Pro (HSDCpro). For more information pertaining to the TSW1400 EVM, see:
http://focus.ti.com/docs/toolsw/folders/print/tsw1400evm.html
Equipment: Signal generators (with low-phase noise) must be used as source of input signal and clock in
order to get the desired performance. Additionally, band-pass filters (BPF) are required in signal and clock
paths to attenuate the harmonics and noise from the generators. (Note: Functionality of the setup
shown in Figure 1, including the LVDS interface between the ADS5296A and FPGA on the capture
card, can be tested using the on-chip test pattern generator and the on-board crystal oscillator for
an ADC sampling clock source.)
Power Supply: A single +5-V supply powers the ADS5296A EVM through connectors located at J1 and
J2. The supply for the ADS5296A device is derived from this +5 V supply. The power supply must be able
to source up to 1.5 A. The TSW1400 EVM is powered through an AC adaptor provided with its EVM kit.
USB Interface to PC: The USB connections from the ADS5296A EVM and TSW1400 EVM to the
personal computer (PC) are used for communication from the GUIs to the boards. Section 2 explains the
TSW1400 and ADS5296 GUI installation procedure.
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2 GUI Software Installation
The ADS5296A EVM and the TSW1400 EVM both require software installations. The following two
sections explain where to find and how to install the software properly. Ensure that no USB connections
are made to the EVMs until after the installations are complete.
2.1 TSW1400 EVM GUI Installation (High Speed Data Converter Pro (HSDCpro))
From the Texas Instruments website, www.ti.com, search for TSW1400. Under Technical Documents, one
will find a Software section from which High Speed Data Converter Pro GUI Installer can be
downloaded and saved (slwc107e.zip or higher).
• Unzip the saved folder and run the installer executable to obtain the menu shown in Figure 2.
• Click the Install button.
Figure 2. HSDCpro Install (a)
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• Set the destination directories, or leave as default, for the TSW1400 GUI installation and press the
Next button as shown in Figure 3.
Figure 3. HSDCpro Install (b)
• Read the License Agreement from Texas Instruments and select I accept the License Agreement and
press the Next button as shown in Figure 4.
Figure 4. HSDCpro Install (c)
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• Read the License Agreement from National Instruments and select I accept the License Agreement
and press the Next button as in Figure 5.
Figure 5. HSDCpro Install (d) 80
• Press the Next button as shown in Figure 6.
Figure 6. HSDCpro Install (e)
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• The window shown in Figure 7 should appear, indicating that installation is in progress.
Figure 7. HSDCpro Install (f)
• The window shown in Figure 8 appears indicating Installation Complete. Press the Next button.
Figure 8. HSDCpro Install (g)
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• The window in Figure 9 appears briefly to complete the process.
Figure 9. HSDCpro Install (h)
• As shown in Figure 10, a computer restart might be requested depending on whether or not the PC
already has the National Instruments’ MCR installer. If requested, hit the Restart button to complete
the installation.
Figure 10. HSDCpro Install (i)
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2.2 ADS5296A EVM GUI Installation
Both the ADS5295 and ADS5296A ADCs from Texas Instruments share the same GUI installer. Thus,
references to ADS5295_96 during the installation exist. From the Texas Instruments website, www.ti.com,
search for ADS5296A EVM. Clicking on the hyperlink in the table will lead to another link titled ADS5295
and ADS5296 GUI Installer, v2.1 (Rev. B). Click on this link to download and save the zipped file
(slac547b.zip).
• Unzip the folder and run the Setup.bat file as administrator by right clicking on it and selecting Run as
administrator as shown in Figure 11.
Figure 11. ADS5296 GUI Install (a)
• Set the destination directories for the ADS5295_96 GUI installation or leave as default and press the
Next button as shown in Figure 12.
Figure 12. ADS5296 GUI Install (b)
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• Read the License Agreement from Texas Instruments and select the I accept the License Agreement
button and then press the Next button as shown in Figure 13.
Figure 13. ADS5296 GUI Install (c)
• Read the License Agreement from National Instruments and select the I accept the License Agreement
button and then press the Next button as shown in Figure 14.
Figure 14. ADS5296 GUI Install (d)
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• To begin the installation, press the Next button as shown in Figure 15.
Figure 15. ADS5296 GUI Install (e)
• The window shown in Figure 16 should appear showing that installation is in progress.
Figure 16. ADS5296 GUI Install (f)
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• Upon completion of the installation, the window in Figure 17 appears. Press the Finish button to
continue.
Figure 17. ADS5296 GUI Install (g)
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3 Hardware and EVM Setup for Testing ADS5296A
This section outlines the external connections required for ADS5296A EVM as well as the default
configuration of the EVM’s 3-pin headers and 0-Ωjumper resistors with an explanation of configuration
options.
3.1 External Connections
The connections shown in Figure 18 should be made for proper hardware setup (Note: Testing the LVDS
interface between the ADS5296A EVM and the TSW1400 EVM can be performed using a RAMP function
generated within the ADS5296A device in lieu of the signal source listed in item 7 below. Also, an on-
board 80-MHz crystal oscillator (XTAL) can provide the ADC sampling clock in lieu of the signal source
listed in item 6 below. This configuration is only recommended for testing the RAMP function as low phase
noise filtered signal sources must be provided to both the ADC clock input and the ADC analog inputs for
measuring device performance).
Figure 18. TSW1400 and ADS5296A EVM Setup
1. Mate the TSW1400 EVM at connector J3 to the ADS5296A EVM at connector J8 through the high
speed ADC interface connector.
2. Connect the DC +5-V output of the provided AC-to-DC power supply to J12 (+5V_IN) of the TSW1400
EVM and the input of the power supply cable to a 110–230 VAC source.
3. Connect +5-V DC power supply leads to connectors J1 (VCC) and J2 (GND) of the ADS5296A EVM.
4. Connect the USB cable from PC to J13 (USB) of ADS5296A EVM
5. Connect the USB cable from PC to J5 (USB_IF) of the TSW1400 EVM. (Note: it is recommended that
the PC USB port be able to support USB2.0. If unsure, always chose the USB ports at the back of the
PC chassis over ones located on the front or sides.)
6. Supply an ADC clock signal to SMA J31 (CLK_XFMR) of the ADS5296A EVM (that is, +5 dBm,
80 MHz) but turn off the source as the on board 80-MHz crystal oscillator (XTAL) will be used as a
clock source for the initial testing.
7. Supply an analog input signal to SMA J15 (CH5_XFMR) of the ADS5296A EVM (that is, +10 dBm,
10 MHz).
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3.2 ADS5296A EVM Header Configuration
The ADS5296A EVM is flexible in its configurability through the use of 3 pin headers. The default
configuration of the EVM is set to facilitate initial testing requiring minimal bench equipment by providing
an 80-MHz ADC sampling clock from an on-board crystal oscillator (XTAL). Table 1 describes the purpose
of the 3-pin headers on the EVM while Figure 19 shows the default position. With this configuration, the
XTAL, at reference designator U2, is powered and providing an 80-MHz signal to a transformer which, in
turn, provides a differential sampling clock to the DUT. Table 1 also shows that the default method for
selecting even or odd channels in interleaving mode is done through the ADS5296 GUI (JP14) as
opposed to jumper JP2 on the EVM.
Table 1. ADS5296A EVM Header Configuration
Jumper Default Config Pin 1 Pin 3 Circuit Description
Silkscreen Silkscreen
JP4 short pins 1-2 1.8V_AVDD +3.3V Power Supply Power Supply for DUT: ALWAYS
1.8V_AVDD
J35 short pins 2-3 GND CDC_3.3V ADC Sampling Clock Selects Power supply for CDC chip and on-
board XTAL oscillator: (1) GND or (3) +3.3V
J38 short pins 1-2 XTAL CLK_XFMR ADC Sampling Clock Selects ADC sampling clock source: (1)
XTAL osc. or (3) external source input to
SMA J31 CLK_XFMR
J36 short pins 1-2 XTAL XTAL_CDC ADC Sampling Clock Selects path for XTAL osc. signal: (1) to
transformer or (3) to CDC input
J37 short pins 1-2 XTAL CLK_CDC ADC Sampling Clock Selects input source to CDC input: (1) XTAL
osc. or (3) external source input to SMA J33
CLK_CDC
J39 short pins 2-3 SE DIFF ADC Sampling Clock Selects ADC sampling clock configuration:
(1) Single-ended (3) Differential (must match
J40)
J40 short pins 2-3 SE DIFF ADC Sampling Clock Selects ADC sampling clock configuration:
(1) Single-ended or (3) Differential (must
match J39)
JP2 short pins 1-2 EVEN ODD INTERLEAVE_MUX pin Selects analog input channels to be
interleaved: (1) EVEN channels or (3) ODD
channels
JP14 short pins 1-2 FTDI EVM INTERLEAVE_MUX Selects source of EVEN/ODD select: (1) GUI
control or (3) INTERLEAVE_MUX pin control
JP3 short pins 1-2 1.8V_AVDD GND SYNC SYNC (Note: JP3 and J34 share silkscreen
"GND")
J34 short pins 2-3 5V GND EXT_REF AMP Selects Power supply for EXT_REF AMP:
(1) +5V or (3) GND (Note: JP3 and J34
share silkscreen "GND")
TP16 short pins 1-2 ADCRESETZ n/a SPI Selects SPI control: (1) GUI control
TP17 short pins 1-2 PD n/a SPI Selects SPI control: (1) GUI control
TP15 short pins 1-2 SDOUT n/a SPI Selects SPI control: (1) GUI control
TP14 short pins 1-2 CSZ n/a SPI Selects SPI control: (1) GUI control
TP12 short pins 1-2 SCLK n/a SPI Selects SPI control: (1) GUI control
TP13 short pins 1-2 SDATA n/a SPI Selects SPI control: (1) GUI control
TP20 short pins 1-2 INTERLEAVE_MU n/a SPI Selects SPI control: (1) GUI control
X
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Figure 19. ADS5296A EVM Default Header Configuration
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3.3 ADS5296A EVM 0-ΩJumper Configuration
The ADS5296A can be used an Octal-channel non-interleaving ADC or as a Quad-channel interleaving
ADC. The ADS5296A EVM is delivered in a configuration that allows testing both modes without any
changes required by the user, except through the software GUI.
The ADS5296A EVM has eight SMAs vertically mounted on the topside of the board corresponding to
eight analog input channels labeled CHx_XFMR, where x = 1 to 8, as shown in colored boxes of
Figure 20. Channels 5, 6, 7, and 8, highlighted by the yellow box, are configured for octal non-interleaving
mode and are driven through the back-to-back transformers on the top side of the board, while channels
1, 2, 3, and 4, highlighted by the blue box, are disconnected from the DUT. This is evident by the installed
0-ohm jumper resistors at R210,R399,R209,R386,R208,R394,R207, and R304 and by the uninstalled
0-ohm resistor jumpers at R378,R379,R155,R154,R166,R165,R168, and R167, respectively.
Figure 20. ADS5296A EVM Octal Non-Interleaving Mode Analog Input SMAs
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The ADS5296A EVM also has four side-mounted SMAs corresponding to four analog input channels
labeled CH1_AMP(1,2),CH2_AMP(3,4),CH3_AMP(5,6),CH4_AMP(7,8) as shown in colored boxes of
Figure 21. Channels 1 and 2, highlighted by the yellow box, are configured for quad non-interleaving mode
and are driven through the amplifiers on the back side of the board, while channels 3 and 4, highlighted by
the blue box, are disconnected from the DUT. This is evident by the installed 0-ohm jumper resistors on
the backside at R80,R81,R324, and ADS5296A, 4-Channel 200-MSPS, and 8-Channel 80-MSPS,
Analog-to-Digital Converter Evaluation Module, and by the uninstalled 0-ohm resistor jumpers on the
backside at R346,R348,R368, and R370, respectively. When an input signal is provided SMA J27,
CH1_AMP(1,2), a switch internal to the ADS5296A, selects whether ADC channel 1 or ADC channel 2 is
sampled. The selection depends on the state of GUI control ODD_EVEN_SEL or on the position of
header JP2.
Figure 21. ADS5296A EVM Quad Interleaving Mode Analog Input SMAs
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4 Testing ADS5296A EVM
This section outlines the following three test cases with a sub-section dedicated to each case:
• Capturing a RAMP test pattern
• Capturing a Sinusoidal Input in Octal Non-Interleaving Mode
• Capturing a Sinusoidal Input in Quad Interleaving Mode
Only the minimal software GUI settings required to achieve the above tests will be described in this
section. For a detailed explanation of the ADS5296 software GUI and all its features, please see
Section 5. For a detailed explanation of the High Speed Data Converter Pro software GUI, please consult
the TSW1400 User’s Guide (SLWU079B), available on the Texas Instruments website.
4.1 TSW1400 and ADS5296 GUI Setup
1. With the setup outlined in Figure 18 established, launch the High Speed Data Converter Pro GUI. The
GUI should automatically detect the serial number of the TSW1400 EVM, connected as shown in
Figure 22. Click on OK.
Figure 22. TSW1400 GUI Setup (a)
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The message shown in Figure 23 will appear. Click OK.
Figure 23. TSW1400 GUI Setup (b)
If instead, the message shown in Figure 24 appears, it indicates that the USB connection to the
TSW1400 EVM is not present. Click OK, then establish a USB connection and repeat step 1.
Figure 24. TSW1400 GUI Setup (c)
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