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ADSxx54EVM-PDK Kit Operation

6.6

FFT Analysis

The

Performance Analysis

page in the GUI performs the fast fourier transform (FFT) of the captured data,

and displays the resulting frequency domain plots of channel A and channel B of the ADSxx54. This page
also calculates key ADC dynamic performance parameters, such as signal-to-noise ratio (SNR), total
harmonic distortion (THD), signal-to-noise and distortion ratio (SINAD), and spurious-free dynamic range
(SFDR).

Figure 23

shows the FFT performance analysis display. The FFT calculated parameters are

shown on the right side of the display.

Figure 23. FFT Performance Analysis Page

21

SBAU209 – April 2014

ADS8354EVM-PDK and ADS7854EVM-PDK

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Copyright © 2014, Texas Instruments Incorporated

Summary of Contents for ADS7854EVM-PDK

Page 1: ...chematic diagrams and bills of material Throughout this document the terms ADSxx54EVM PDK demonstration kit evaluation board evaluation module are synonymous with the ADS8354EVM PDK and ADS7854EVM PDK...

Page 2: ...etion 14 14 GUI Display Prompt 15 15 Open the ADSxx54EVM Settings Page 16 16 Selecting the External Onboard Reference or the ADSxx54 Internal Dual Reference 16 17 Programming the REFDAC Registers in t...

Page 3: ...nce buffering with OPA2350 Onboard THS4521 200 MHz bandwidth 1 mA quiescent current ADC input drivers 1 2 ADSxx54EVM PDK Features Jumper selectable 1 x Vref range or 2 x Vref range USB port for comput...

Page 4: ...nals CHB negative differential input This terminal can be grounded JP3 2 A1 for single ended signals JP4 2 A1 CHB positive differential input or input for single ended signals Table 2 lists the SMA an...

Page 5: ...ct common mode voltage level Table 3 describes the appropriate range jumper settings Table 3 Analog Input Range Jumper Settings Jumper Number Default Position Description Installed when FSR 1 Vref rem...

Page 6: ...ting bit B6 of the ADC configuration register Note that this bit is common to ADC_A and ADC_B Configure the reference settings on the ADSxx54EVM PDK by navigating to the ADSxx54EVM Settings page on th...

Page 7: ...A J6 42 SDO_B Serial data output for channel B 3 1 Serial Peripheral Interface SPI The ADSxx54 digital output is available in SPI compatible format which makes interfacing with microprocessors digita...

Page 8: ...y Jumpers Pin Number Position Function Shunt 2 3 default Onboard 5 V AVDD analog supply selected JP10 External 5 V AVDD connected through two terminal Shunt 1 2 block J5 Open Onboard regulated AVDD su...

Page 9: ...header connector to A1 JP4 Open JP4 2 header connector to A1 JP5 Closed Closed when configured in Vref range open to support 2 Vref range JP6 Closed Closed when configured in Vref range Open to suppo...

Page 10: ...l the microSD Memory Card on the SDCC Controller Board The ADSxx54EVM PDK includes a microSD memory card that contains the EVM software and SDCC controller board firmware required for the EVM operatio...

Page 11: ...gure 4 Step 3 Connect the ADSxx54EVM board to the SDCC controller board as Figure 6 illustrates Figure 6 Connecting ADSxx54EVM Board to SDCC Controller Board Step 4 Connect the SDCC controller board t...

Page 12: ...p exe This action installs the EVM GUI software and the required and SDCC device driver components 4 After the installer begins a welcome screen displays Click Next to continue 5 A prompt appears with...

Page 13: ...he Windows security message shown in Figure 11 Select Install this driver software anyway to install the driver required for proper operation of the software The drivers contained within the installer...

Page 14: ...the SDCC device driver as shown in Figure 12 and Figure 13 Step 2 A computer restart may be required to finish the software installation If prompted restart the PC to complete the installation Figure...

Page 15: ...x54EVM settings when the EVM is not acquiring data During acquisition all controls are disabled and settings cannot be changed Settings on the ADSxx54EVM correspond to settings described in the ADSxx5...

Page 16: ...ngs Page 2 In the ADSxx54EVM Settings page find the Internal Reference CFR Bit 6 button to select the internal or external onboard reference sources Jumpers JP7 and JP8 must be installed when selectin...

Page 17: ...ite REFDAC_x button Figure 17 shows the internal reference Vref Value ADC x control panels in the ADSxx54EVM Settings page of the GUI Figure 17 Programming the REFDAC Registers in the ADSxx54EVM 4 Scr...

Page 18: ...device datasheet for more information Figure 19 shows the Device Registers page of the GUI Figure 19 Device Registers Page 6 5 Capturing Data with the ADSxx54EVM PDK Access the Data Monitor page in th...

Page 19: ...SCLK frequency the data rate of the ADSxx54 is configured The ADS8354EVM PDK software supports SCLK frequencies of 24 MHz 20 MHz and 16 2 MHz These SCLK frequencies correspond to data rates of 705 8 k...

Page 20: ...A and channel B in decimal data format Information such as the device name date and time the sampling frequency and number of samples of the data record are also stored In order to save any data captu...

Page 21: ...y ADC dynamic performance parameters such as signal to noise ratio SNR total harmonic distortion THD signal to noise and distortion ratio SINAD and spurious free dynamic range SFDR Figure 23 shows the...

Page 22: ...ailable None no window weighting function applied use for coherent data Hanning Hamming Blackman Harris Exact Blackman Blackman Flat Top 4 Term Blackman Harris 7 Term Blackman Harris Low Sidelobe For...

Page 23: ...eak to peak noise The Mean column displays the average value of the data set The ENOB StDev column displays the effective number of bits of the converter as calculated from the standard deviation or R...

Page 24: ...splay In order to select the SDCC interface mode of operation navigate to the GUI Settings page and select the SDCC Interface option on the Capture Mode drop down menu as shown in Figure 25 and Figure...

Page 25: ...A Not Install C29 C31 NXP 9 1 D1 DIODE ZENER 5 9V 250MW SOT23 PLVA659A 215 Semiconductors 10 4 J1 J2 J3 J4 Connector TH SMA TE Connectivity 142 0701 201 On Shore 11 1 J5 2 Terminal Block 3 5MM 2POS P...

Page 26: ...Current 33 2 U6 U12 Atmel OPA376AIDBV Precision OPA IC I2C Compatible 2 Wire Serial 34 1 U7 Texas Instruments AT24C02C XHM EEPROM IC 36 V 1 A 4 17uVRMS RF LDO 35 1 U8 Texas Instruments TPS7A4700RGW Vo...

Page 27: ...uts are not to scale These figures are intended to show how the board is laid out they are not intended to be used for manufacturing ADSxx54EVM PCBs Figure 27 ADSxx54EVM PCB Top Layer Figure 28 ADSxx5...

Page 28: ...B Power Layer Figure 30 ADSxx54EVM PCB Bottom Layer 7 3 Schematics The schematics for the ADSxx54EVM are appended to the end of this user s guide 28 ADS8354EVM PDK and ADS7854EVM PDK SBAU209 April 201...

Page 29: ...PIR901 PIR902 COR9 PIR1001 PIR1002 COR10 PIR1101 PIR1102 COR11 PIR1201 PIR1202 COR12 PIR1301 PIR1302 COR13 PIR1401 PIR1402 COR14 PIR1501 PIR1502 COR15 PIR1601 PIR1602 COR16 PIR1701 PIR1702 COR17 PIR18...

Page 30: ...51 PIC5201 PIC5202 COC52 PIC5301 PIC5302 COC53 PIC5401 PIC5402 COC54 PID101 PID102 PID103 COD1 PIJ501 PIJ502 COJ5 PIJ601 PIJ602 PIJ603 PIJ604 PIJ605 PIJ606 PIJ607 PIJ608 PIJ609 PIJ6010 PIJ6011 PIJ6012...

Page 31: ...dling and use of EVMs and if applicable compliance in all respects with such laws and regulations 10 User has sole responsibility to ensure the safety of any activities to be conducted by it and its e...

Page 32: ...nergy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to caus...

Page 33: ...pour chaque type d antenne Les types d antenne non inclus dans cette liste ou dont le gain est sup rieur au gain maximal indiqu sont strictement interdits pour l exploitation de l metteur Mailing Add...

Page 34: ...sponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related inf...

Page 35: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments ADS7854EVM PDK ADS8354EVM PDK...

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