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User's Guide
ADS127L21EVM-PDK Evaluation Module
This user's guide describes the characteristics, operation, and use of the ADS127L21 evaluation module (EVM).
This kit is an evaluation platform for the ADS127L21, which is a 24-bit, high-speed, wide-bandwidth, delta-sigma
(ΔΣ) analog-to-digital converter (ADC). The ADS127L21 offers excellent ac and dc performance, along with
multiple internal digital filter options including a fully programmable finite impulse response (FIR) and infinite
impulse response (IIR) filter, making the device useful for a wide variety of data acquisition applications. The
ADS127L21EVM eases the evaluation of the device with hardware, software, and computer connectivity through
the universal serial bus (USB) interface. This user's guide includes complete circuit descriptions, schematic
diagrams, and a bill of materials. Throughout this document, the abbreviation EVM and the term evaluation
module are synonymous with the ADS127L21EVM.
SBAU411 – FEBRUARY 2023
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ABSTRACT
Copyright © 2023 Texas Instruments Incorporated
ADS127L21EVM-PDK Evaluation Module
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Summary of Contents for Texas Instruments ADS127L21EVM-PDK
- Page 1 (USB) interface. This user's guide includes complete circuit descriptions, schematic diagrams, and a bill of materials. Throughout this document, the abbreviation EVM and the term evaluation module are synonymous with the ADS127L21EVM. SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
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Page 2: Table Of Contents
Microsoft Corporation. ® MATLAB is a registered trademark of MathWorks, Incorporated. All trademarks are the property of their respective owners. ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 3: Evm Overview
ADS127L21EVM PHI Board ADS127L21 ADS127L21 A-to- Micro-B EVM GUI EVM GUI Signal USB Cable Source Included in kit Figure 1-1. System Connection for Evaluation SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 4: Ads127L21Evm Board
CONFIG3_REG; bit 0, STATUS, default 0b, status readback not supported • FILTER3_REG; bits 1:0, DATA_MODE, default 01b, SDO is dual function 1.4 Related Documentation Table 1-1 shows the related documentation from Texas Instruments. Table 1-1. Related Documentation Document Literature Number ADS127L21... -
Page 5: Analog Interface
Although not strictly required, these components can be included in the final design to improve digital signal integrity. Figure 2-1. ADS127L21 Connections and Decoupling SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 6: Adc Input Drive Amplifiers
AVSS C0G/NP0 142-0701-801 1µF 220pF VMAMP AINN AVSS 49.9 0.1% 0.1% 390pF 0.1% AINN C0G/NP0 49.9 THS4561IRUNR 1.00k 0.1% Figure 2-2. ADC Drive Amplifier ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 7: Vcom Buffer
This reference is sufficient to meet ADS127L21 data sheet specifications for dynamic performance. Figure 2-4. Onboard Voltage Reference SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 8: External Voltage Reference
0393570003 REFNb 1.00k 10.0k 0.033µF AVDD1 0R56 REFNb REFN 37.4 1.00k OPA2320SAIDGSR 10µF 1µF AVSS AVSS AVSS Figure 2-5. External Reference Connection and Buffer ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 9: Clock Tree
Case_GND EVM/EXT CLK 100nF 100k U10A KC2016K32.7680C1GE00 TSW-103-07-G-S SN74AUP1G17DCKR 10pF 10pF EVM CLK EXT CLK TSW-103-07-G-S U10B SN74AUP1G17DCKR 100nF IOVDD Figure 2-6. Clock Tree SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 10: Digital Interface
ADS127L21 for operation. The jumper (JP1) is write protected and does not need to be changed for EVM operation. Figure 3-2. EEPROM for EVM ID ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 11: Power Supplies
IOVDD 0R81 MMSZ4703T1G MMSZ4703T1G EVM/External Power AVDD2 AVDD1 +Vin -Vin IOVDD MMSZ4690T1G MMSZ4690T1G 5.6V 5.6V MMSZ4690T1G 5.6V AVSS Figure 4-1. Power Connection and Configuration SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 12: Low Dropout Regulator (Ldo)
-2.5V Analog LDO -Vin -2.5V 0R85 -Vin 11.3k MMSZ4683T1G 0.01µF 10uF NR/SS 10uF 10.0k 0.01µF TPS7A3001DRBR Figure 4-2. LDO Regulators for 5 V and –2.5 V ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 13: Ads127L21 Evm Software Installation
As shown in Figure 5-1, accept the license agreements and follow the on-screen instructions to complete the installation. Figure 5-1. Software Installation and Prompts SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... - Page 14 As part of the ADS127L21 EVM GUI installation, and as shown in Figure 5-2, a prompt with a Device Driver Installation appears on the screen. Click Next to proceed. Figure 5-2. Device Driver Installation ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 15 The ADS127L21EVM requires the LabVIEW™ run-time engine and can possibly prompt for the installation of this software, as shown in Figure 5-3, if not already installed. Figure 5-3. LabVIEW Run-Time Engine Installation SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
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Page 16: Evm Operation
Figure 6-1. Connecting the Hardware to the ADS127L21EVM Select EVM GUI from start menu, or associated shortcut. Figure 6-2. Launch the EVM GUI Software ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 17: Optional Evm Connections
Optional digital signal connections communications Optional external Optional amplifier Optional external Optional power reference connection power connection clock connections Figure 6-3. Optional EVM Connections SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 18: Evm Gui Global Settings For Adc Control
ADC register settings. The registers can be used to set the different device modes (such as filter settings and power settings). Figure 6-4. EVM GUI Global Settings for ADC Control ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 19: Time Domain Display
Switching pages to any of the analysis tools described in the subsequent sections causes calculations to be performed on the same set of data. Figure 6-5. Time Domain Display SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 20: Frequency Domain Display
24-bit ADC. The None option corresponds to not using a window (or a rectangular window) and is not recommended. Figure 6-6. Frequency Domain Display ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 21: Histogram Display
As shown in Figure 6-7, the histogram corresponding to a dc input is displayed on clicking the Capture button. Figure 6-7. Histogram Display SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 22: Digital Filter Configuration
6-8, the Filter Sequence, Selection, and Type can be selected. FIR and IIR coefficient files can also be loaded and the values can be viewed. Figure 6-8. Digital Filter Configuration ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... -
Page 23: Digital Filter Response
There are several prebuilt filters available that can be downloaded to the ADS127L21. These prebuilt filter files can be used as a template for custom filter designs when using the EVM GUI to download to the ADS127L21. The prebuilt filters are copied to the C:\Users\Public\Documents\Texas Instruments\ADS127L21\Configuration Files\Coefficients\ directory when the EVM GUI is installed. -
Page 24: Bill Of Materials, Schematics, And Layout
50 V, +/- 5%, C0G/ 0603 GRM1885C1H121JA01D MuRata NP0, 0603 CAP, CERM, 1000 pF, 1000 pF 25 V, +/- 5%, C0G/ 0603 GRM1885C1E102JA01D MuRata NP0, 0603 ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... - Page 25 Samtec Gold, TH JP4, JP5, JP6, Header, 100mil, 3x1, 3x1 Header TSW-103-07-G-S Samtec Gold, TH PCB Label LBL1 0.650 x 0.200 THT-14-423-10 Brady inch SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 26 RES, 1.0, 5%, 0.4 W, R61, R62, AEC-Q200 Grade 0, 0805 ESR10EZPJ1R0 Rohm R76, R77, R79 0805 RES, 11.3 k, 1%, 0.1 11.3k 0603 RC0603FR-0711K3L Yageo W, 0603 ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 27 -200mA, Ultra-Low- Noise, High-PSRR, Texas DRB0008A TPS7A3001DRBR Low-Dropout (LDO) Instruments Linear Regulator, DRB0008A (VSON-8) Low-Power Single Schmitt-Trigger Buffer, Texas DCK0005A DCK0005A, LARGE Instruments T&R SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
- Page 28 Part Number Manufacturer Reference 32.768 MHz XO (Standard) CMOS Oscillator 1.6 V ~ SMT4_2MM0_ KC2016K32.7680C1GE00 Kyocera 3.63 V Standby (Power 1MM6 Down) 4-SMD, No Lead ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
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Page 29: Schematics
MMSZ4703T1G 1µF AVSS 10µF 100nF TSW-102-07-G-S AVSS AVSS AVDD1 10.0k OPA192IDGKT 0.033µF 1.00k Figure 7-2. ADS127L21EVM External Reference Schematic for Input and VCOM Amplifiers SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... - Page 30 100k U10A KC2016K32.7680C1GE00 TSW-103-07-G-S SN74AUP1G17DCKR 10pF 10pF EVM CLK EXT CLK TSW-103-07-G-S U10B SN74AUP1G17DCKR 100nF IOVDD Figure 7-3. ADS127L21EVM Clock Tree and Power Schematic ADS127L21EVM-PDK Evaluation Module SBAU411 – FEBRUARY 2023 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated...
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Page 31: Board Layout
Bill of Materials, Schematics, and Layout 7.3 Board Layout Figure 7-4 shows the PCB layout for the ADS127L21EVM. Figure 7-4. PCB Layout for the ADS127L21EVM SBAU411 – FEBRUARY 2023 ADS127L21EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated... - Page 32 STANDARD TERMS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms set forth herein.
- Page 33 www.ti.com Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and software developers to write software applications for use with the end product.
- Page 34 www.ti.com Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à...
- Page 35 www.ti.com EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
- Page 36 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2023, Texas Instruments Incorporated...
- Page 37 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2023, Texas Instruments Incorporated...
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