Texas Instruments ADS9120 User Manual Download Page 20 | Manualshive

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Texas Instruments ADS9120 User Manual Download Page 20

ADS9120EVM-PDK Operation

20

SBAU262 – August 2016

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Copyright © 2016, Texas Instruments Incorporated

ADS9120EVM-PDK

Figure 13. Spectral Analysis Tool

Finally, 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. Note that the

None

option corresponds to not using a window (or using a rectangular window) and is

not recommended.

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Summary of Contents for ADS9120

Page 1: ...PDK This kit is an evaluation platform for the ADS9120 which is an 16 bit 2 5 MSPS fully differential input successive approximation register SAR analog to digital converter ADC that features an enha...

Page 2: ...yout and Schematics 24 7 1 Bill of Materials 24 7 2 PCB Layout 27 7 3 Schematics 30 List of Figures 1 OPA625 Differential Input Driving Path 6 2 Common Mode Selection Jumpers 7 3 Onboard Reference Sig...

Page 3: ...orated ADS9120EVM PDK 1 J7 and J3 SMA Connectors Description 5 2 J4 and J6 Headers Description 5 3 J1 and J2 Configuration per Input Common Mode 7 4 External Source Requirements for Evaluation of the...

Page 4: ...K includes the following features Hardware and software required for diagnostic testing as well as accurate performance evaluation of the ADS9120 ADC USB powered no external power supply is required T...

Page 5: ...e must be differential or balanced keeping the negative and positive inputs to the board symmetric such that Vs Vs at any given time Table 1 J7 and J3 SMA Connectors Description Pin Number Signal Desc...

Page 6: ...the two OPA625 operational amplifiers drive the ADS9120 differential inputs with 2 2 impedance up to 7 MHz that properly drives the low dynamic impedance of the ADC inputs at 2 5 MSPS Figure 1 OPA625...

Page 7: ...p to the 1 k of the input resistor thereby moving the output common mode of the OPA625 amplifiers To compensate for this change in output common mode R1 can be modified according to the particular ext...

Page 8: ...hput of 2 5 MSPS The schematic for the reference driver circuit is shown in Figure 3 Figure 3 Onboard Reference Signal Path 3 Digital Interfaces As noted in Section 1 the EVM interfaces with the PHI t...

Page 9: ...minimize inductance along the load current path 5 ADS9120EVM PDK Initial Setup This section explains the initial hardware and software setup procedure that must be completed for the proper operation...

Page 10: ...opyright 2016 Texas Instruments Incorporated ADS9120EVM PDK Figure 4 ADS9120 Software Installation Prompts As a part of the ADS9120EVM GUI installation a prompt with a Device Driver Installation will...

Page 11: ...DS9120EVM PDK NOTE A notice may appear on the screen stating that Widows cannot verify the publisher of this driver software Select Install this driver software anyway The ADS9120EVM PDK requires LabV...

Page 12: ...st 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated ADS9120EVM PDK After these installations verify that C Program Files x86 Texas Instruments ADS9120EVM is as shown in...

Page 13: ...er and evaluating the performance of the ADS9120 1 Connect the ADS9120EVM to the PHI Install the two screws as indicated in Figure 8 2 Use the USB cable provided to connect the PHI to the computer LED...

Page 14: ...on www ti com 14 SBAU262 August 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated ADS9120EVM PDK 3 Launch the ADS9120EVM GUI software as shown in Figure 9 Figure 9 Launc...

Page 15: ...on options in this pane allow the user to choose from various SPI and multiSPI host interface options available on the ADS9120 The host always communicates with the ADS9120 using the standard SPI prot...

Page 16: ...ADC sampling rate can differ from the target value depending on the applied SCLK frequency and selected Device Mode and the closest match achievable is displayed This pane therefore allows the user t...

Page 17: ...lues on this page correspond to the Host Configuration Settings that enable ADC sampling at the maximum sampling rate specified for the ADC The register values can be edited by double clicking the cor...

Page 18: ...drive circuits The user can trigger a capture of the data of the selected number of samples from the ADS9120 as per the current interface mode settings using the capture button as indicated in Figure...

Page 19: ...in Table 4 Table 4 External Source Requirements for Evaluation of the ADS9120 Specification Description Specification Value Signal frequency 2 kHz External source type Balanced differential External s...

Page 20: ...ncludes 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 optio...

Page 21: ...erated by the various sources connected to the ADC when measuring a dc signal The cumulative effect of noise coupling to the ADC output from sources such as the input drive circuits the reference driv...

Page 22: ...d the external source must meet the requirements in Table 5 Table 5 External Source Requirements for ADS9120 Evaluation Specification Description Specification Value Signal frequency 2 kHz External so...

Page 23: ...www ti com ADS9120EVM PDK Operation 23 SBAU262 August 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated ADS9120EVM PDK Figure 15 Linearity Analysis Tool...

Page 24: ...29 C39 C45 C50 C51 MuRata CAP CERM 10 F 10 V 10 X7T 0603 GRM1885C1H102FA01J 3 C16 C31 C42 MuRata CAP CERM 1000 pF 50 V 1 C0G NP0 0603 C0603C100F5GAC7867 1 C18 Kemet CAP CERM 10 pF 50 V 1 C0G NP0 0603...

Page 25: ...8 R50 Vishay Dale RES 2 21 1 0 1 W 0603 881545 2 3 SH J1 SH J2 SH J3 TE Connectivity Shunt 100mil Gold plated Black 5016 5 TP1 TP2 TP3 TP4 TP5 Keystone Test Point Compact SMT 5015 2 TP6 TP7 Keystone T...

Page 26: ...C56 Taiyo Yuden CAP CERM 0 47 F 35 V 10 X5R 0805 N A 0 FID1 FID2 FID3 FID4 FID5 FID6 N A Fiducial mark There is nothing to buy or mount 102 1092 BL 00100 0 H12 CNC Tech CABLE USB A MALE B MICRO MALE 1...

Page 27: ...d Schematics 27 SBAU262 August 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated ADS9120EVM PDK 7 2 PCB Layout Figure 16 through Figure 19 illustrate the EVM PCB layout...

Page 28: ...f Materials PCB Layout and Schematics www ti com 28 SBAU262 August 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated ADS9120EVM PDK Figure 17 ADS9120EVM PCB Layer 2 GND...

Page 29: ...com Bill of Materials PCB Layout and Schematics 29 SBAU262 August 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated ADS9120EVM PDK Figure 18 ADS9120EVM PCB Layer 3 Power...

Page 30: ...www ti com 30 SBAU262 August 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated ADS9120EVM PDK Figure 19 ADS9120EVM PCB Layer 4 Bottom Layer 7 3 Schematics Figure 20 thro...

Page 31: ...0 F C41 AGND REFOUT 4 5V AGND 0 01 F C35 AGND AGND 1 2 3 J6 TSM 103 01 L SV AGND 1 F C36 DNP AGND 0 R52 DNP 5 2V 1 F C40 AGND 1 F C38 AGND EVM_DVDD REF_BUF 0 01 F C34 AGND 0 01 F C37 10 F C28 10 F C29...

Page 32: ...DNP AGND 1 F 0603 C5 AGND AGND 47 F C3 AGND 5 2V 0 1 R2 AGND 1 F C2 AGND 5 2V 0 22 R8 10 F C4 AGND 5016 TP4 REFOUT 10 0k R5 20 0k R15 20 0k R10 AGND J2 87898 0204 AGND J1 87898 0204 280k R1 1 F C6 AGN...

Page 33: ...B Logo3 FCC disclaimer Rafael Ordonez H5 1891 H8 1891 H6 1891 H7 1891 H1 PMSSS 440 0025 PH H2 PMSSS 440 0025 PH H3 PMSSS 440 0025 PH H4 PMSSS 440 0025 PH LOGO PCB Logo2 Texas Instruments Label Assembl...

Page 34: ...ing the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repa...

Page 35: ...transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indic...

Page 36: ...ified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors current sens...

Page 37: ...REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE L...

Page 38: ...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...

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