Texas Instruments AFE5807EVM User manual

User's Guide
SLOU309–December 2010
AFE5807/08EVM (Rev D) Evaluation Module
This document assists users in evaluating the AFE5807 and AFE5808 highly integrated analog front-end
devices through the use of the AFE5807/08EVM Evaluation Module. Included are setup instructions,
printed-circuit board art, bill of materials, and schematics.
Contents
1 Overview ..................................................................................................................... 2
2 Default Configuration ....................................................................................................... 2
3 Software Installation and Operation ...................................................................................... 3
3.1 GUI Installation (Mandatory) ...................................................................................... 3
3.2 USB Interface Driver Installation ................................................................................. 3
4 Test Setup ................................................................................................................... 5
5 Power Up AFE5807/08 ..................................................................................................... 6
6 Launch AFE5807/08 GUI .................................................................................................. 6
7 Launch TSW1250 GUI ..................................................................................................... 7
8 TEST AFE5807/08 .......................................................................................................... 8
8.1 Step 1: Time Domain .............................................................................................. 8
8.2 Step 2: Single Tone FFT ........................................................................................ 10
9 Hardware Setup, CW Mode .............................................................................................. 12
9.1 Step 1: Switch to CW Mode. .................................................................................... 12
9.2 Step 2: Apply input and observe outputs. ..................................................................... 13
9.3 External Clock for CW Mode .................................................................................... 14
10 External ADC Sampling Clock ........................................................................................... 16
11 External Vcntl .............................................................................................................. 18
12 Board Configuration ....................................................................................................... 20
12.1 Input/Output, Power Supply, and USB ........................................................................ 20
12.2 CW Mode, ADC Clock ........................................................................................... 21
12.3 Vcntl Control Input ................................................................................................ 22
12.4 LEDs ............................................................................................................... 23
12.5 Miscellaneous Test Points ....................................................................................... 24
13 EVM Printed-Circuit Board Layouts and Schematics ................................................................. 25
14 Bill of Materials ............................................................................................................. 31
List of Figures
1 AFE5807/08EVM Basic Configuration ................................................................................... 3
2 HW Setup With Connection Between TSW1250EVM and AFE5807/08 ............................................ 5
3 User Interface: Single FFT Format...................................................................................... 11
4 Setup for CW Mode ....................................................................................................... 12
5 Switching From Default (ADC) Mode Panel to CW Mode Panel.................................................... 13
6 CW Outputs ................................................................................................................ 14
7 Relevant Capacitors for CW Mode, Top Side ......................................................................... 15
8 Relevant Capacitors for CW Mode, Bottom Side ..................................................................... 16
9 External ADC Sampling Clock Configuration.......................................................................... 17
10 External Vcntl Configuration ............................................................................................. 19
11 I/O, PWR, and USB Connector.......................................................................................... 20
Windows is a trademark of Microsoft Corporation.
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Overview www.ti.com
12 AFE5807/08EVM Jumper Locations.................................................................................... 21
13 Vcntl......................................................................................................................... 22
14 AFE5807/08EVM LED Location......................................................................................... 23
15 AFE5807/08EVM Test Point Locations................................................................................. 24
16 Top Layer - Signal......................................................................................................... 25
17 Second Layer - Ground................................................................................................... 26
18 Third Layer - Power ....................................................................................................... 27
19 Fourth Layer - Signal...................................................................................................... 28
20 Fifth Layer - Ground....................................................................................................... 29
21 Bottom Layer - Signal..................................................................................................... 30
List of Tables
1 Configuration for Clock Capacitors...................................................................................... 14
2 Input/Output, Power, and USB .......................................................................................... 20
3 CW Mode, ADC Clock ................................................................................................... 21
4 CW Mode and Vcntl....................................................................................................... 22
5 LED Indicators ............................................................................................................. 23
6 Test Points ................................................................................................................. 24
7 Bill of Materials............................................................................................................. 31
1 Overview
This document is intended to guide users step-by-step through the AFE5807/08EVM Evaluation Module
(EVM) setup and test . The EVM is shipped with a default configuration from the manufacturer. With this
configuration, the onboard CMOS clock is used for a analog-to-digital converter sampling clock; the
onboard oscillator is used for CW mode operation. No external clock generator is required. Users need to
provide the input signal for measurement from a signal generator.
Detail explanation regarding the jumpers, connectors, and test points appear in Section 12. The graphical
user interface (GUI) can be downloaded from the TI Web site.
2 Default Configuration
Figure 1 shows the default configuration of the EVM from the factory. The accompanying list identifies the
basic components on the EVM board.
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JP3
JP10
JP2
JP31
+5V
-5V
GND
JP1
JP 9
JP15
JP1
www.ti.com Software Installation and Operation
Figure 1. AFE5807/08EVM Basic Configuration
1. P1 –Power supplies connector.
2. JP1, JP2, and JP3 are set to enable 3.3-V, 1.8-V, and 5-V power supplies to device.
3. JP9: enables onboard CMOS clock.
4. JP10: Power supply for onboard CMOS clock oscillator.
5. JP15: Enables onboard VCNT.
6. JP31 always set as Figure 1.
3 Software Installation and Operation
The AFE5807/08EVM comes with a software installation compact disk (CD); run setup.exe to install the
software.
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 the EVM to your personal computer (PC).
•If the driver has not been installed, then the message "Window Found New Hardware" appears. As
shown in the following illustration, the Wizard launches. Otherwise, skip this section, and go to
Section 4.
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Software Installation and Operation www.ti.com
• Select "No, not this time" from the options. Press the 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 C:\Program Files\Texas
Instruments\CDM 2.04.06 WHQL Certified in the combo-box, or browse to it by 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.
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-5 V PowerSupply
+6V supply
USB Interface
USB Interface
+5 V PowerSupply
Filter for input signal
Vcntl Supply;
Ground
ADC (external) sampling
-
www.ti.com Test Setup
4 Test Setup
Two EVMs are required to evaluate the AFE5807/08 device. The following illustration shows the exact
setup of these two boards and external connectors. For the default configuration as shown in Figure 1, it is
unnecessary to have an external sampling clock and external Vcntl supply. The onboard CMOS clock and
onboard Vcntl are used.
Figure 2. HW Setup With Connection Between TSW1250EVM and AFE5807/08
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LED3.3VA
LED- 5V
LED3.3VD
LED5V
LED1.8V
LED41
LED42
P1
Power Up AFE5807/08 www.ti.com
5 Power Up AFE5807/08
Power up the AFE5807/08EVM by applying +5 V and –5 V to the P1 connector. After power up is
complete, four green LEDS and two red LEDS are turned on as shown in the following illustration.
6 Launch AFE5807/08 GUI
Launch the AFE5807/08 graphic user interface (GUI), which appears in the following illustration. After the
GUI has completely launched, LED41 and LED42 go off and the rest of the LEDS remain on. The GUI
automatically configures the default setup. Select the ADC page to observe the default condition.
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www.ti.com Launch TSW1250 GUI
The following illustration shows the Default Condition on the ADC page.
7 Launch TSW1250 GUI
Launch the TSW1250 GUI. The Message window displays the following message to indicate that the
setup of the TSW1250EVM and AFE5807/08EVM is working properly. If a different message or an error
message appears, contact TI FAE.
Select AFE5807,14 bits,MSB first from the GUI.
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Message
ADC Input
Frequency
ADC Sampling
Rate
Select
TEST AFE5807/08 www.ti.com
ADC Sampling Rate is fixed at 40 MHz; this is the onboard CMOS clock frequency.
ADC Input Frequency –enter 2M, and the GUI calculates the real coherent frequency to 2.00439453M.
8 TEST AFE5807/08
8.1 Step 1: Time Domain
•Select the Time Domain page from the TSW1250 GUI.
•Uncheck Overlay unwrap waveform.
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Overlay unwrap waveform
www.ti.com TEST AFE5807/08
•From the AFE5808 GUI, go to the ADC page, and then select Ramp.
•Press the Capture button on the TSW1250 GUI. You will observe a ramping waveform on the
TSW1250 GUI display area as shown in the following illustration.
•Repeat for Channel 2 and Channel 8.
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TEST AFE5807/08 www.ti.com
• If each channel has the output as shown in the following illustration, proceed with the next
step; otherwise, contact the TI FAE to troubleshoot the problem.
•On the AFE5808 GUI, change Test Pattern from Ramp to None for the next step.
8.2 Step 2: Single Tone FFT
•Select the Single Tone FFT page at the TSW1250 GUI.
•Connect Channel 1 of the AFE5807EVM to a signal generator through an LP filter. If an LP filter is not
present, the result will not be good.
•Set the amplitude of the signal generator to -25dBm.
•Set the frequency of the signal generator to 2.00439453M to match the GUI.
•Change the window option to Hanning. This is because the input signal and the onboard CMOS clock
are noncoherent.
•Press the Capture button to get the test result.
•Repeat for Channel 2 through Channel 8.
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Hanning
www.ti.com TEST AFE5807/08
Figure 3. User Interface: Single FFT Format
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Analog input
(note absence
of filter) (J1 - J8)
CW outputs (I
and Q) (J12, 13)
Note that LEDs
41-43 are on
Hardware Setup, CW Mode www.ti.com
9 Hardware Setup, CW Mode
Figure 4. Setup for CW Mode
9.1 Step 1: Switch to CW Mode.
•Go to the CW Mode page.
•Check CW Mode Enable. The LED41, LED42, and LED43 on AFE5807/08EVM all illuminate.
•Select 500ohms for the gain control feedback resistor.
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Gain Control
Feedback Resistor
500 W
CW Mode Enabled
www.ti.com Hardware Setup, CW Mode
Figure 5. Switching From Default (ADC) Mode Panel to CW Mode Panel
9.2 Step 2: Apply input and observe outputs.
•Apply an analog signal (2.51 M, –10 dBm) to any analog input SMA.
•The CW outputs (J12, J13) display the frequency I and Q signals at 10 kHz as shown in Figure 6. The
GUI Gain Control Feedback Resistor can be used to vary the amplitude of the outputs.
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Hardware Setup, CW Mode www.ti.com
Figure 6. CW Outputs
9.3 External Clock for CW Mode
The CW mode clocks can be supplied from J9 (X16/X8/X4/X1) and J10 (X1) using external signal
generators. The manufacture default setup uses ON BOARD CLOCK, with which C154, C155, C156, and
C157 are installed. To switch to an external clock, these four capacitors must be uninstalled and
capacitors C49,C50,C52, and C53 must be installed. The following table shows the configuration for these
eight capacitors.
Table 1. Configuration for Clock Capacitors
Capacitor Onboard Clock External Clock Comments
C49 Uninstalled Installed Top layer of the EVM
C50 Uninstalled Installed Bottom layer of the EVM
C52 Uninstalled Installed Bottom layer of the EVM
C53 Uninstalled Installed Top layer of the EVM
C154 Installed Uninstalled Top layer of the EVM
C155 Installed Uninstalled Top layer of the EVM
C156 Installed Uninstalled Top layer of the EVM
C157 Installed Uninstalled Top layer of the EVM
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C154
C155
C156
C157
C53
C49
www.ti.com Hardware Setup, CW Mode
Figure 7. Relevant Capacitors for CW Mode, Top Side
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C50
C52
External ADC Sampling Clock www.ti.com
Figure 8. Relevant Capacitors for CW Mode, Bottom Side
10 External ADC Sampling Clock
To use the external clock generator to test the AFE5807/08, perform the following steps.
1. Reconfigure JP9 as shown in the following illustration. The rest of the jumpers remain the same.
2. Connect the external generator as shown in Figure 9.
3. Set the generator output to 40 MHz, 13 dBm.
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JP9
Ext Clock
Connector
www.ti.com External ADC Sampling Clock
Figure 9. External ADC Sampling Clock Configuration
4. If the generators for the ADC clock and input signal are synchronous, then choose Rectangular as the
Windowing option; otherwise, use Hanning or Hamming.
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External Vcntl www.ti.com
5. The test procedure is the same for the CMOS ADC clock.
11 External Vcntl
•JP15 needs to be reconfigured to short the leftmost two pins.
•A power supply is required to be connected as shown in Figure 10.
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JP15
Power
Supply
www.ti.com External Vcntl
Figure 10. External Vcntl Configuration
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P1
USB1
JP6
J7 J5 J3 J1
J8 J6 J4 J2
JP3
JP1
JP2
JP18
TP1
TP33VA
TP2
TP18VD
TP4
TP5V
TP -5V
TP3
TP33VD
Board Configuration www.ti.com
12 Board Configuration
12.1 Input/Output, Power Supply, and USB
Figure 11. I/O, PWR, and USB Connector
Table 2. Input/Output, Power, and USB
Connector Description
J1 through J8 Analog Input signals for Ch1 through Ch8. Connect to a signal generator. A bandpass filter must be applied
between the generator and the SMA to get a better result. (See Figure 1 .)
P1/JP6 P1 is the +5-V and –5-V power supply connector. JP6 is the test point for +5-V/-5-V power supply.
JP3 Onboard 5-V enable. Set up as Figure 2 is a must to use onboard 5-V supply.
XP-5V -5-V supply test point.
TP5V +5-V supply test point.
JP1 Onboard +1.8-V enable. Set up as shown in Figure 2; required to use the onboard +1.8 V.
JP2 Onboard 3.3-VA enable. Set up as shown in Figure 2; required to use the onboard 3.3 V.
TP18VD +1.8-VD supply test point.
TP33VD +3.3-VD supply test point.
TP33VA +3.3-VA supply test point.
TP1 through TP4 Ground test points.
USB1 USB interface connector
JP18 Test points for USB data bus: From pin 1 to pin 9 the signals are: D0, D4, D2, D1, D7, D5, D6, and D3
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