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User's Guide

SLOU328A– November 2011– Revised December 2011

AFE5808/08AEVM (Rev E) Evaluation Module

This document assists users in evaluating the AFE5808/08A highly integrated analog front-end devices

through the use of the AFE5808/08AEVM 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

4 Test Setup ................................................................................................................... 3

5 Power Up AFE5808/08A ................................................................................................... 4

6 Launch AFE5808/08A GUI ................................................................................................ 6

7 Launch TSW1250 GUI ..................................................................................................... 8

8 TEST AFE5808/08A ........................................................................................................ 9

8.1 Step 1: Time Domain .............................................................................................. 9

8.2 Step 2: Single Tone FFT ........................................................................................ 11

9 Hardware Setup, CW Mode .............................................................................................. 12

9.1 Step 1: Switch to CW Mode. .................................................................................... 13

9.2 Step 2: Apply input and observe outputs. ..................................................................... 14

9.3 External Clock for CW Mode .................................................................................... 15

10 External ADC Sampling Clock ........................................................................................... 16

11 External Vcntl .............................................................................................................. 19

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

13.1 Schematics ........................................................................................................ 31

14 Bill of Materials ............................................................................................................. 40

List of Figures

1 AFE5808/08AEVM Basic Configuration.................................................................................. 3

2 HW Setup With Connection Between TSW1250EVM and AFE5808/08A........................................... 4

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

12 AFE5808/08AEVM Jumper Locations .................................................................................. 21

SLOU328A– November 2011– Revised December 2011 AFE5808/08AEVM (Rev E) Evaluation Module

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Summary of content (45 pages)

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User's Guide SLOU328A – November 2011 – Revised December 2011 AFE5808/08AEVM (Rev E) Evaluation Module This document assists users in evaluating the AFE5808/08A highly integrated analog front-end devices through the use of the AFE5808/08AEVM Evaluation Module. Included are setup instructions, printed-circuit board art, bill of materials, and schematics. 14 Contents Overview .....................................................................................................................
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Overview www.ti.com 13 Vcntl ......................................................................................................................... 22 14 AFE5808/08AEVM LED Location ....................................................................................... 23 15 AFE5808/08AEVM Test Point Locations ............................................................................... 24 16 Top Layer - Signal ...................................................................................
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Software Installation and Operation www.ti.com Figure 1. AFE5808/08AEVM Basic Configuration 1. 2. 3. 4. 5. 6. 3 P1 – Power supplies connector. JP1, JP2, and JP3 are set to enable 3.3-V, 1.8-V, and 5-V power supplies to device. JP9: enables onboard CMOS clock. JP10: Power supply for onboard CMOS clock oscillator. JP15: Enables onboard VCNT. JP31 always set as Figure 1. Software Installation and Operation The AFE5808/08AEVM GUI (SLOC230) can be downloaded from the TI Web site.
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Power Up AFE5808/08A www.ti.com Ground USB Interface USB Interface Filter for input signal -5 V PowerSupply +5 V PowerSupply +6V supply ADC (external) sampling Vcntl Supply; - Figure 2. HW Setup With Connection Between TSW1250EVM and AFE5808/08A 5 Power Up AFE5808/08A Power up the AFE5808/08AEVM 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.
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Power Up AFE5808/08A www.ti.com LED 1.
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Launch AFE5808/08A GUI 6 www.ti.com Launch AFE5808/08A GUI Launch the AFE5808/08A 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. The following illustration shows the Default Condition on the ADC page.
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Launch AFE5808/08A GUI www.ti.
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Launch TSW1250 GUI 7 www.ti.com Launch TSW1250 GUI Launch the TSW1250 GUI. The Message window displays the following message to indicate that the setup of the TSW1250EVM and AFE5808/08AEVM is working properly. If a different message or an error message appears, contact TI FAE. Select AFE5808/08A, 14 bits, MSB first from the GUI. 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.
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TEST AFE5808/08A www.ti.com 8 TEST AFE5808/08A 8.1 Step 1: Time Domain • • Select the Time Domain page from the TSW1250 GUI. Uncheck Overlay unwrap waveform. Overlay unwrap waveform • From the AFE5808/08A GUI, go to the ADC page, and then select Ramp.
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TEST AFE5808/08A • • • • 10 www.ti.com 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. 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 AFE5808/08A GUI, change Test Pattern from Ramp to None for the next step.
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TEST AFE5808/08A www.ti.com 8.2 Step 2: Single Tone FFT • • • • • • • Select the Single Tone FFT page at the TSW1250 GUI. Connect Channel 1 of the AFE5808/08AEVM 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.
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Hardware Setup, CW Mode 9 www.ti.com Hardware Setup, CW Mode Note that LEDs 41- 43 are on CW outputs (I and Q) (J12, 13) Analog input (note absence of filter) (J1 - J8) Figure 4.
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Hardware Setup, CW Mode www.ti.com 9.1 Step 1: Switch to CW Mode. • • • Go to the CW Mode page. Check CW Mode Enable. The LED41, LED42, and LED43 on AFE5808/08AEVM all illuminate. Select 500ohms for the gain control feedback resistor. Figure 5.
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Hardware Setup, CW Mode 9.2 www.ti.com 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. Figure 6.
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Hardware Setup, CW Mode www.ti.com 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. Table 1 shows the configuration for these eight capacitors. Table 1.
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External ADC Sampling Clock www.ti.com C50 C52 Figure 8. Relevant Capacitors for CW Mode, Bottom Side 10 External ADC Sampling Clock To 1. 2. 3. 16 use the external clock generator to test the AFE5808/08A, perform the following steps. Reconfigure JP9 as shown in the following illustration. The rest of the jumpers remain the same. Connect the external generator as shown in Figure 9. Set the generator output to 40 MHz, 13 dBm.
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External ADC Sampling Clock www.ti.com 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 ADC Sampling Clock www.ti.com 5. The test procedure is the same for the CMOS ADC clock.
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External Vcntl www.ti.com 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. Figure 10.
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Board Configuration 12 www.ti.com 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 20 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.
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Board Configuration www.ti.com 12.2 CW Mode, ADC Clock Figure 12. AFE5808/08AEVM Jumper Locations Table 3. CW Mode, ADC Clock Clock Type Reference Designator Description J9/J10 External CW Mode clock. The default is using onboard oscillator. J12 JP52/JP53 CW Mode J13 JP56/JP57 ADC CW output for I-channel via an external operational amplifier. The EVM has converted the differential signal CW_IP_OUTP and CW_IP_OUTM into this single-ended output through an operational amplifier.
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Board Configuration www.ti.com 12.3 Vcntl Control Input Figure 13. Vcntl Table 4. CW Mode and Vcntl 22 Connector Description JP15 Choose onboard Vcntl or external Vcntl. The default setup uses onboard Vcntl. J14 External Vcntl input. The range is from 0 V to 1.5 V. VR2 Onboard Vcntl adjustment. Use JP15 pin 3 which has the text On-Board to monitor the Vcntl voltage level.
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Board Configuration www.ti.com 12.4 LEDs The AFE5808/08AEVM has seven LEDs. Their locations are shown in Figure 14. Their ON/OFF states demonstrate the normal operation of the power supplies and the PLL status of the clock buffer. LED 1.8V Figure 14. AFE5808/08AEVM LED Location Table 5. LED Indicators Reference Designator Power Supply Color LED-5V –5 V Green LED5V +5 V Green LED3.3VD +3.3 VD Orange LED3.3VA +3.3 VA Green LED1.8V +1.
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Board Configuration www.ti.com 12.5 Miscellaneous Test Points Figure 15. AFE5808/08AEVM Test Point Locations Table 6. Test Points 24 Reference Designator Description TP9, TP12, TP13,TP34 AFE808/08A device test pin M8, L5, M5, and M9 JP19 REFM voltage input JP31 SDOUT read enable JP44 RESET input. Short to reset AFE5808/08A.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com 13 EVM Printed-Circuit Board Layouts and Schematics The following illustrations show the six layers of the AFE5808/08AEVM board. Figure 16.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com Figure 17.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com Figure 18.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com Figure 19.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com Figure 20.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com Figure 21.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com IN EN OUT GND NR/FB PURE GREEN PURE GREEN ORANGE PURE GREEN PURE GREEN ORANGE OUT GND NR/FB EN IN EN IN OUT GND NR/FB PURE GREEN 13.1 Schematics Figure 22.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com Figure 23.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com Figure 24.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com Figure 25.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com Figure 26.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com Figure 27.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com Figure 28.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com Figure 29.
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EVM Printed-Circuit Board Layouts and Schematics www.ti.com Figure 30.
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Bill of Materials 14 www.ti.com Bill of Materials Table 7.
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Bill of Materials www.ti.com Table 7.
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Bill of Materials www.ti.com Table 7. Bill of Materials (continued) QTY 42 MFG MFG Part# REF DES Description Value or Function 1 VISHAY CRCW04024701F100 R55 RES,SMT,0402 RESISTOR,SMT,0402,4.
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Bill of Materials www.ti.com Table 7. Bill of Materials (continued) QTY 8 MFG MFG Part# REF DES Description Value or Function Distributor Distributor Part # TDK Corporation C1005X5R0J105M C30, C31, C32, C33, C34, C35, C36, C37 CAP,SMT,0402 CAP CER 1.0UF 6.3V X5R 20% 0402 Digi-Key 445-1415-1-ND C49,C50,C116,C117, C52,C53 DO NOT INSTALL C49,C50,C116,C117C52,C53 NOTE: ASTERISK(*) NEXT TO PART MANUFACTURER'S NAME DENOTES POSSIBLE LONG LEAD TIME ITEM.
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Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.