Texas Instruments ADS5294EVM User manual

User's Guide
SLAU355–July 2011
ADS5294, 8-Channel, Analog-to-Digital Converter
Evaluation Module
This user’s guide gives a general overview of the 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 ADS5294 analog-to-digital converters (ADC), which collectively are referred to as
ADS529x. Use this document in combination with the respective ADC data sheet. The ADS529xEVM
provides a platform for evaluating the ADC under various signal, clock, reference, and power supply
conditions.
Contents
1 Quick View of Evaluation Setup ........................................................................................... 3
2 Default Configuration ....................................................................................................... 4
3 Software Installation and Operation ...................................................................................... 4
3.1 GUI Installation –Mandatory ..................................................................................... 5
3.2 USB Interface Driver Installation ................................................................................. 5
4 Test Setup ................................................................................................................... 6
5 Power Up ADS5294 ........................................................................................................ 7
6 Launch ADS5294 GUI ...................................................................................................... 8
7 Launch TSW1250 GUI .................................................................................................... 11
8 TEST ADS5294 ............................................................................................................ 12
8.1 Step 1: Time Domain ............................................................................................ 12
8.2 Step 2: Single Tone FFT ........................................................................................ 15
9 Board Configuration ....................................................................................................... 17
9.1 Input/Output, Power Supply, and USB ........................................................................ 17
9.2 ADC Clock ......................................................................................................... 19
9.3 Light-Emitting Diodes ............................................................................................ 21
9.4 Miscellaneous Test Points ....................................................................................... 22
10 EVM Schematics .......................................................................................................... 23
11 ADS5294EVM Bill of Materials .......................................................................................... 31
12 ADS5294EVM Printed-Circuit Board Layout ........................................................................... 33
List of Figures
1 Evaluation Setup............................................................................................................ 3
2 ADS5294EVM Basic Configuration....................................................................................... 4
3 HW Setup With Connection Between TSW1250EVM and ADS5294EVM.......................................... 7
4 Power-Up Indications....................................................................................................... 8
5 ADS5294 GUI Launch...................................................................................................... 9
6 TSW1250 GUI Launch.................................................................................................... 11
7 ADS5294 Time Domain Setup........................................................................................... 12
8 ADS5294 Test Pattern.................................................................................................... 13
9 User Interface: Time Domain Format................................................................................... 14
10 User Interface: Single FFT Format...................................................................................... 16
11 I/O, PWR, and USB Connector.......................................................................................... 17
12 ADS5294EVM Default Clock Jumper Locations ...................................................................... 19
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13 ADS5294EVM LED Location ............................................................................................ 21
14 ADS5294EVM Test Point Locations .................................................................................... 22
15 Schematic, Sheet 1 of 9 .................................................................................................. 23
16 Schematic, Sheet 2 of 9 .................................................................................................. 24
17 Schematic, Sheet 3 of 9 .................................................................................................. 24
18 Schematic, Sheet 4 of 9 .................................................................................................. 25
19 Schematic, Sheet 5 of 9 .................................................................................................. 26
20 Schematic, Sheet 6 of 9 .................................................................................................. 27
21 Schematic, Sheet 7 of 9 .................................................................................................. 28
22 Schematic, Sheet 8 of 9 .................................................................................................. 29
23 Schematic, Sheet 9 of 9 .................................................................................................. 30
24 ADS5294EVM Top Layer Assembly Drawing –Top View........................................................... 33
25 ADS5294EVM Bottom Layer Assembly Drawing –Bottom View ................................................... 34
26 ADS5294EVM Top Layer Copper –Top View ........................................................................ 35
27 ADS5294EVM Internal Layer 1, Ground –Top View................................................................. 36
28 ADS5294EVM Internal Layer 2, Power –Top View .................................................................. 37
29 ADS5294EVM Internal Layer 3, Power –Top View .................................................................. 38
30 ADS5294EVM Internal Layer 4, Ground –Top View................................................................. 39
31 ADS5294EVM Bottom Layer Copper –Top View..................................................................... 40
List of Tables
1 Input/Output, Power, and USB .......................................................................................... 17
2 Channel 8 Configuration.................................................................................................. 18
3 ADC Clock Various Mode Jumper Settings ........................................................................... 19
4 LED Indicators ............................................................................................................. 21
5 Miscellaneous Test Points................................................................................................ 22
6 Bill of Materials............................................................................................................. 31
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Input Signal
Generator
Ext Clock Generator
(Optional)
+5V Ext
Power
Supply Wall Adaptor
ADS5294
EVM
TSW1250
EVM
TSW1250 GUI
ADS5294 GUI
Ch1
PC
+6V Supply
J7
USB
USB
P1
BPF
BPF
USB
USB
J8
Input Signal
Generator
Ext Clock Generator
(Optional)
+5V Ext
Power
Supply Wall Adaptor
ADS5294
EVM
TSW1250
EVM
TSW1250 GUI
ADS5294 GUI
Ch1
PC
+6V Supply
J7
USB
USB
P1
BPF
BPF
USB
USB
J8
www.ti.com Quick View of Evaluation Setup
1 Quick View of Evaluation Setup
Figure 1 shows an overview of the evaluation setup that includes the ADS5294EVM evaluation module
(EVM), TSW1250EVM, external equipment, personal computer (PC), and software requirements.
Figure 1. Evaluation Setup
TSW1250EVM: The high-speed LVDS deserializer board is required for capturing data from the
ADS5294EVM and its analysis using the TSW1250 graphical user interface (GUI).
For more information pertaining to be TSW1250EVM, see:
http://focus.ti.com/docs/toolsw/folders/print/tsw1250evm.html.
Equipment: Signal generators (with low-phase noise) must be used as source of input signal and clock
(optional) in order to get the desired performance. Additionally, band-pass filters (BPF) are required in
signal and clock (optional) paths to attenuate the harmonics and noise from the generators.
Power Supply: A single +5-V supply powers the ADS5294EVM. The supplies for the ADS5294 device are
derived from the +5-V supply. The power supply must be able to source up to 1.5 A. A +6-V supply can
power the TSW1250EVM using a wall adapter.
USB Interface to PC: The USB connection from the ADS5294EVM and TSW1250EVM to the personal
computer (PC) must be set up; Section 3.2 explains the USB driver installation.
ADS5294GUI: Section 3.1 explains the GUI installation procedure and its operation.
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P1
TP_VP
TP2
USB1
JP5
JP6
JP4
JP16 JP18
JP20
JP13
JP19
Default Configuration www.ti.com
2 Default Configuration
Figure 2. ADS5294EVM Basic Configuration
1. The ADS5294EVM basic configuration uses the onboard single-ended clock as the default option. See
Section 9.2 for the ADC clock, various-mode jumper settings.
2. P1: +5-V Power supplies the connector.
3. JP4, JP5, and JP6 are set to enable +3.3V Analog, +1.8VD Digital, and +1.8VA Analog to device,
respectively.
4. JP13: Enable onboard CMOS clock.
5. JP16, JP18, JP19, JP20: ADC clock source selection jumpers.
3 Software Installation and Operation
The ADS5294EVM comes with a software installation CD; run setup.exe to install the software.
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www.ti.com Software Installation and Operation
3.1 GUI Installation –Mandatory
Unzip the installer file in the CD. Run setup.exe to install the GUI.
3.2 USB Interface Driver Installation
•Connect the USB port of EVM to your PC.
•If the driver has not been installed, then the message Window Found New Hardware appears. The
Wizard as shown in the following illustration launches. Otherwise, skip Section 3.2 and go to Section 4.
•Select No, not this time from the options. Press Next button
•Select Install from a list or specific location (Advanced) as shown in the following illustration, and then
click Next.
•Select Search for the best driver in these locations, and enter the file path for (C:\Program Files\Texas
Instruments\ADS 5294EVM\CDM 2.04.06 WHQL Certified) in the combo-box. or browse to it by
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Test Setup www.ti.com
clicking the browse button. Once the file path has been entered in the box, click Next to proceed.
•If Windows™XP is configured to warn when unsigned (non-WHQL certified) drivers are about to be
installed, the following screen is displayed unless installing 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 appears.
4 Test Setup
To evaluate the ADS5294 device, a TSW1250EVM is required. Figure 3 shows the exact setup of these
two boards and external connectors.
•Connect +5-V supply at P1 connector or across TP_VP (+5V) and TP2 (GND).
•Connect USB cable from PC to USB1 on ADS5294EVM.
•Connect ADS5294EVM to TSW1250EVM using P10 connector.
•Connect USB cable from PC to USB port J8 of TSW1250EVM.
•Connect +6-V wall adapter to TSW1250EVM at J7 connector.
For the default configuration as shown in Figure 2, it is unnecessary to have an external sampling clock.
The onboard CMOS clock oscillator is used.
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USB1 J8
P10
P1
ADS5294EVM TSW1250EVM
TP_VP TP2
Bottom
Side
J7
www.ti.com Power Up ADS5294
Figure 3. HW Setup With Connection Between TSW1250EVM and ADS5294EVM
5 Power Up ADS5294
After connecting the ADS5294EVM to the TSW1250 using the P10 connector, +6-V adapter to
TSW1250EVM, and +5 V (from the external power supply) to P1 connector, then power up is complete.
Three green LEDs and one orange LED turned on as shown in Figure 4 (also see Figure 13).
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LED33VA
LED18VA
LED_+5 V
P10
P1
To TSW1250
LED18VD
Bottom
Side
Launch ADS5294 GUI www.ti.com
Figure 4. Power-Up Indications
6 Launch ADS5294 GUI
After launching the ADS5294 GUI, the GUI appears as is shown in Figure 5. After the GUI is completely
launched, the window appears as is displayed in Figure 5. Select the Top Level tab to observe the default
condition. The bottom status bar indicates Ready for new command and green (highlighted). Click on
checkbox PD, and select it for power down to ensure proper software link to the hardware by observing
change in current reading (approximately 450 mA to 150 mA) of the external +5-V power supply. For the
rest of the test, PD must be unchecked. Click on Soft Reset button to reset device internally.
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www.ti.com Launch ADS5294 GUI
Figure 5. ADS5294 GUI Launch
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Launch ADS5294 GUI www.ti.com
After GUI launch and verification of software communication with EVM, click on button EN_2WIRE. This
configures the ADC output interface in 2-WIRE LVDS mode. Also click button ADC Bit Resolution to set
ADC in 14 Bits mode. Ensure that the MSB_LSB button status shows LSB_First.
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Message
ADC
Input Frequency
ADC
Sampling Rate (Fs)
ADC5294_2W
Data Caption Options
LSB First
14 bits
www.ti.com Launch TSW1250 GUI
7 Launch TSW1250 GUI
Launch TSW1250 GUI. The Message window displays this message to indicate that the setup of the
TSW1250EVM and ADS5294EVM is working properly. If a different message or an error message
appears, contact TI FAE.
1. Select ADS5294_2W, 14bits, from the GUI.
2. Select LSB First from Data Caption Options menu.
3. ADC Sampling Rate (Fs) is fixed at 80 MHz; this is the onboard CMOS clock frequency.
4. ADC Input Frequency –enter 5M and the GUI calculates the real coherent frequency (Fc) to
4.98535156M.
Figure 6. TSW1250 GUI Launch
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Overlay Unwrap waveform Time Domain
TEST ADS5294 www.ti.com
8 TEST ADS5294
8.1 Step 1: Time Domain
•Select Time Domain page from TSW1250 GUI.
•Uncheck Overlay unwrap waveform.
Figure 7. ADS5294 Time Domain Setup
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RAMP PATTERN
www.ti.com TEST ADS5294
•From ADS5294 GUI, go to Test Pattern page, then select RAMP PATTERN.
Figure 8. ADS5294 Test Pattern
•Press Capture button on TSW1250 GUI. You observe a ramping waveform on the TSW1250 GUI
display area as shown in Figure 9.
•Repeat for Channel 2...Channel 8.
•If each channel has the output as shown in the following illustration, you can proceed with the
next step; otherwise, contact the TI FAE (Field Application Engineer) to troubleshoot the
problem.
•On the ADS5294 GUI, change Test Pattern to None from RAMP PATTERN for next step.
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TEST ADS5294 www.ti.com
Figure 9. User Interface: Time Domain Format
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www.ti.com TEST ADS5294
8.2 Step 2: Single Tone FFT
•Select Single Tone FFT page at TSW1250 GUI.
•Connect Channel 1 of ADS5294EVM to a signal generator through a BP filter. If no BP filter is
presented, the result is not good.
•Set Amplitude of the signal generator to 10dBm
•Set Frequency of the signal generator to 4.98535156M to match the GUI.
•Change window option to Hanning. This is due to the fact that input signal and onboard CMOS clock
are noncoherent.
•Press Capture button to get the test result.
•Repeat for Channel 2...Channel 8.
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Hanning Single Tone FFT
TEST ADS5294 www.ti.com
Figure 10. User Interface: Single FFT Format
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J14
USB1
J15
J11
J13
J7
P1
J12
J10
J6
J16
JP5
J8 J4
JP6
JP4
TP2
TP_VP
J5
www.ti.com Board Configuration
9 Board Configuration
9.1 Input/Output, Power Supply, and USB
Figure 11. I/O, PWR, and USB Connector
Table 1. Input/Output, Power, and USB
Connector Description
J6,J7,J10….J15 Analog Input signals for Ch1-Ch8. Connect to a signal generator. A band-pass filter must be applied between
the generator and the SMA to get a better result. (See Figure 3)
J16 It is an alternative input for channel 8. Need to install two resistors (R169 and R170) and remove two
resistors(R171 and R172) from J6.
P1/TP_VP P1 is the +5-V power supply connector. TP_VP is the test point for +5-V power supply.
JP4 Onboard 3.3-V Analog enables. Set up as Figure 2 is a must to use onboard 3.3 V
JP5 Onboard 1.8-V Digital enables. Set up as Figure 2 is a must to use onboard 1.8 V
JP6 Onboard 1.8-V Analog enables. Set up as Figure 2 is a must to use onboard 1.8 V
TP1, TP2, TP3, Ground test points.
TP4, TP5, TP14,
TP21, TP23,
TP25, TP34,
USB1 USB interface connector
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Board Configuration www.ti.com
Table 2. Channel 8 Configuration
Input Interface Type Connector Description
Through Transformer J6 In default configuration, R171 and R172 are already populated
(Default)
Through Amplifier (Not J16 It is an alternative input for channel 8. Need to install two resistors (R169 and
Default) R170) and remove two resistors(R171 and R172) from J6.It uses TI THS4509
single-ended to differential amplifier.
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JP16
JP18
JP15
J5
JP20
JP17
JP13
JP19
J8 J4
J16
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9.2 ADC Clock
Five options are available for the source of the ADC clocks. Refer to Table 3 for details. In Figure 12,
ADS5294EVM uses an onboard, single-ended clock as the default option.
Figure 12. ADS5294EVM Default Clock Jumper Locations
Table 3. ADC Clock Various Mode Jumper Settings
Reference
Clock Type Jumper Setting Diagram
Designator
Onboard CMOS JP13, JP19, JP20, JP13 (1-2), JP20 (2-3), JP19 (1-2), JP16 (2-3), Dia. 1
Oscillator JP16, JP18 JP18 (2-3) (Default Option)
Single Ended External CMOS J8, JP19, JP20, JP16, JP20 (2-3), JP19 (2-3), JP16 (2-3), JP18 (2-3) Dia. 2
Clock Generator JP18 and Connect CMOS clock generator output at
SMA connector J8.
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Dia.1 Dia.2 Dia.3
Dia.4 Dia.5
Board Configuration www.ti.com
Table 3. ADC Clock Various Mode Jumper Settings (continued)
Reference
Clock Type Jumper Setting Diagram
Designator
Transformer Based JP15, JP17, JP16, JP15 (1-2), JP16 (1-2),JP17 (1-2), JP18 (1-2), Dia. 3
External JP18, J4 and Connect external Clock source at SMA
connector J4
Onboard Clock JP13, JP19, JP20, JP13 (1-2), JP20 (1-2), JP19 (1-2), JP15 (2-3), Dia. 4
Buffer JP15, JP17, JP16, JP17 (2-3), JP16 (1-2), JP18 (1-2).
(CDCLVP1102,U4) JP18
Differential This configures the onboard CMOS oscillator
Clock Signal as clock input to buffer.
J8, JP19, JP20, JP15, JP19 (2-3), JP20 (1-2), JP15 (2-3), JP17 (2-3), Dia. 5
JP17, JP16, JP18 JP16 (1-2), JP18 (1-2) and Connect External
CMOS generator output at SMA connector J8.
This configures the external CMOS source as
clock input to buffer.
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