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Texas Instruments ADS8568EVM-PDK Скачать руководство пользователя страница 17

6.5 Frequency Domain Display

The spectral analysis tool, shown in

, is intended to evaluate the dynamic performance (SNR, THD,

SFDR, SINAD, and ENOB) of the ADS8568 ADC through single-tone sinusoidal signal FFT analysis using the 7-
term Blackman-Harris window setting. The FFT tool includes windowing options that are required to mitigate the
effects of non-coherent sampling (this discussion is beyond the scope of this document). The 7-Term Blackman
Harris window is the default option and has sufficient dynamic range to resolve the frequency components of up
to a 24-bit ADC. The None option corresponds to not using a window (or using a rectangular window) and is not
recommended.

Figure 6-5. Frequency Domain Display

ADS8568EVM Operation

SBAU193E – JUNE 2011 – REVISED MAY 2021

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ADS8568EVM-PDK Evaluation Module

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Copyright © 2021 Texas Instruments Incorporated

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Содержание ADS8568EVM-PDK

Страница 1: ...cludes a programmable internal buffered voltage reverence The ADC includes a serial SPI interface and a parallel interface for data communication Configuration of the device is achieved through simple...

Страница 2: ...ion 4 Figure 2 1 ADC Signal and Supply Connection 5 Figure 2 2 Amplifier Drive Circuit 6 Figure 3 1 PHI to ADS8568EVM connector 7 Figure 3 2 Static Digital Input Configuration 8 Figure 3 3 EEPROM for...

Страница 3: ...Jumper Settings 14 Trademarks All trademarks are the property of their respective owners www ti com Trademarks SBAU193E JUNE 2011 REVISED MAY 2021 Submit Document Feedback ADS8568EVM PDK Evaluation M...

Страница 4: ...S8568 GUI Signal Source Signal Source A0 A0 B0 B1 C1 D1 D0 C0 15V lab supply J9 Figure 1 1 System Connection for Evaluation 1 2 ADS8568EVM Board Features Eight input channels connected to external sin...

Страница 5: ...ND 24 DVDD 25 DB7 26 DB6 SEL_B 27 DB5 SEL_CD 28 DB4 29 DB3 DCIN_A 30 DB2 DCIN_B 31 DB1 DCIN_C 32 DB0 DCIN_D 33 RANGE XCLK 34 BUSY INT 35 ASLEEP 36 CONVST_A 37 CONVST_B 38 CONVST_C 39 CONVST_D 40 HW SW...

Страница 6: ...only shows one channel but this circuit is repeated 8 times For other channels see Appendix A GND GND GND 1 2 3 4 8 9 OPA2211AIDDA U1A 39pF C4 1 00k R4 1 00k R6 0 R3 DNP 0 R11 DNP 10 0 R8 2200pF C12 1...

Страница 7: ...or also provides I2C signals that are used on the EEPROM identification circuit GND GND 1 1 3 3 5 5 7 7 9 9 11 11 13 13 15 15 17 17 19 19 21 21 23 23 25 25 27 27 29 29 31 31 33 33 35 35 37 37 39 39 41...

Страница 8: ...y the PHI controller or by the push button switch Note that RESET is an active high signal so the two reset signals are applied to an OR function so that the device will be reset if either the push bu...

Страница 9: ...ions and LED Indicators The screw terminal block J9 is used to connect the external high voltage supplies These supplies are not provided in the evaluation module kit and it is expected that you will...

Страница 10: ...tings an error message may appear or the installer The exe file can be deleted Accept the license agreements and follow the on screen instructions shown in Figure 5 1 to complete the installation Figu...

Страница 11: ...5 3 if not already installed Figure 5 3 LabVIEW Run Time Engine Installation Verify that C Program Files x86 Texas Instruments ADS8568EVM is as shown in Figure 5 4 after these installations www ti co...

Страница 12: ...EVM GUI Folder Post Installation Installing ADS8568EVM Software www ti com 12 ADS8568EVM PDK Evaluation Module SBAU193E JUNE 2011 REVISED MAY 2021 Submit Document Feedback Copyright 2021 Texas Instrum...

Страница 13: ...es will turn on 5 Connect the high voltage power supplies HVDD 15 V HVSS 15 V and GND 6 Connect the signal generator The default input range is 10 V or 10Vpk A common input signal applied is a sinusoi...

Страница 14: ...ss wAmp These eight jumpers determine if the amplifier is used to buffer the inputs signals or if it is bypassed Choosing wAmp will connect the amplifier between each SMA connector J1 to J8 and the AD...

Страница 15: ...ce can use different input voltage ranges serial or parallel communications hardware or software mode and internal or external reference Refer to the data sheet for details on these modes The maximum...

Страница 16: ...ated in Figure 6 4 by using the Capture button The sample indices are on the x axis and there are two y axes showing the corresponding output codes as well as the equivalent analog voltages based on t...

Страница 17: ...ffects of non coherent sampling this discussion is beyond the scope of this document The 7 Term Blackman Harris window is the default option and has sufficient dynamic range to resolve the frequency c...

Страница 18: ...the input drive circuits the reference drive circuit the ADC power supply and the ADC itself is reflected in the standard deviation of the ADC output code histogram that is obtained by performing mult...

Страница 19: ...e and Running the GUI 4 Use the Tools menu to Load EEPROM according to the device that is currently installed When this procedure is successfully completed you will see the status bar at the top of th...

Страница 20: ...X D1 D2 2 15 V Diode TVS Uni 15 V 24 4 Vc SMB SMBJ15A 13 F Diodes Inc D3 D4 D6 D7 4 Green LED Green SMD APT2012LZGCK Kingbright D5 1 5 V Diode TVS Uni 5 V 9 2 Vc 400 W 43 5 A SMA SMAJ5 0A Littelfuse H...

Страница 21: ...00 k 1 0 1 W 0603 RC0603FR 07100KL Yageo R117 R118 2 6 65k RES 6 65 k 1 0 1 W 0603 RC0603FR 076K65L Yageo S1 1 Switch Tactile SPST NO 0 05A 12V SMD EVQPNF04M Panasonic S2 1 Switch Slide SPDT 100 mA SM...

Страница 22: ...to buy or mount N A N A R1 R3 R9 R11 R15 R17 R23 R25 R29 R31 R37 R39 R45 R47 R53 R55 0 0 RES 0 5 0 1 W 0603 RC0603JR 070RL Yageo R59 R64 0 10 0k RES 10 0 k 1 0 1 W 0603 RC0603FR 0710KL Yageo R77 R78...

Страница 23: ...signals are on top and bottom TOP BOTTOM Figure A 1 Top and Bottom Layer ADS8568EVM www ti com Bill of Materials Layout and Schematic SBAU193E JUNE 2011 REVISED MAY 2021 Submit Document Feedback ADS8...

Страница 24: ...nner Power Layer Inner Ground Layer shows the internal ground layer All GND connections are to this layer using vias Bill of Materials Layout and Schematic www ti com 24 ADS8568EVM PDK Evaluation Modu...

Страница 25: ...Inner Ground Layer www ti com Bill of Materials Layout and Schematic SBAU193E JUNE 2011 REVISED MAY 2021 Submit Document Feedback ADS8568EVM PDK Evaluation Module 25 Copyright 2021 Texas Instruments I...

Страница 26: ...0 DCIN_D 33 RANGE XCLK 34 BUSY INT 35 ASLEEP 36 CONVST_A 37 CONVST_B 38 CONVST_C 39 CONVST_D 40 HW SW 41 CH_A0 42 REFAP 43 AGND 44 AVDD 45 REFBN 53 CH_A1 47 HVDD 48 CH_B0 49 REFBP 50 AGND 51 AVDD 52 R...

Страница 27: ...0 1 00k R2 1 00k R5 1 00k R16 1 00k R19 1 00k R30 1 00k R46 1 00k R49 1 00k R33 0 R3 DNP 0 R11 DNP 0 R17 DNP 0 R25 DNP 0 R31 DNP 0 R39 DNP 0 R47 DNP 0 R55 DNP 0 R1 DNP 0 R9 DNP 0 R15 DNP 0 R23 DNP 0 R...

Страница 28: ...STD PAR_SER STBY REFEN_ WR BUSY ASLEEP HW_SW 5 11 R113 EVM_ID_SDA EVM_ID_SCL ID_PWR ID_PWR GND GND A0 1 A1 2 A2 3 VSS 4 SDA 5 SCL 6 WP 7 VCC 8 U7 BR24G32FVT 3AGE2 2 1 3 S2 OUT 1 NC 2 SENSE 3 6P4V2 4 6...

Страница 29: ...es from Revision D February 2020 to Revision E May 2021 Page Added Evaluation Module to document title 0 Corrected spelling in Abstract section 1 www ti com Revision History SBAU193E JUNE 2011 REVISED...

Страница 30: ...ther than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control tec...

Страница 31: ...These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not in...

Страница 32: ...instructions set forth by Radio Law of Japan which includes but is not limited to the instructions below with respect to EVMs which for the avoidance of doubt are stated strictly for convenience and s...

Страница 33: ...any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electr...

Страница 34: ...R DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthe...

Страница 35: ...are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and...

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