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User's Guide
ADS131B26Q1EVM-PDK Evaluation Module
This user's guide describes the design and operation of the ADS131B26Q1EVM-PDK. This evaluation
module (EVM) is an evaluation board for the ADS131B26-Q1, a complete analog front-end (AFE) for
automotive electrical vehicle (EV) battery management systems (BMS) that integrates two pairs of simultaneous-
sampling, high-precision, 24-bit analog-to-digital converter (ADC) channels to redundantly measure battery
current and battery pack voltage with high resolution and accuracy. The EVM allows evaluation of all
aspects of the ADS131B26-Q1. This user's guide covers the operation of the ADS131B26Q1EVM-PDK.
Throughout this document, the terms evaluation board, evaluation module, and EVM are synonymous with
the ADS131B26Q1EVM-PDK. The terms PHI controller, PHI, and host are synonymous with the precision host
interface (PHI) controller board that interfaces the EVM to the PC. Complete circuit descriptions, schematic
diagrams, and bill of materials are included in this document.
SBAU413 – OCTOBER 2022
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ABSTRACT
Figure 1-1. ADS131B26Q1EVM-PDK Evaluation Module
Copyright © 2022 Texas Instruments Incorporated
ADS131B26Q1EVM-PDK Evaluation Module
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Summary of Contents for Texas Instruments ADS131B26Q1EVM-PDK
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Page 1: Figure 1-1. Ads131B26Q1Evm-Pdk Evaluation Module
Throughout this document, the terms evaluation board, evaluation module, and EVM are synonymous with the ADS131B26Q1EVM-PDK. The terms PHI controller, PHI, and host are synonymous with the precision host interface (PHI) controller board that interfaces the EVM to the PC. Complete circuit descriptions, schematic diagrams, and bill of materials are included in this document. -
Page 2: Table Of Contents
5.2 EVM Graphical User Interface (GUI) Software Installation....................6 ADS131B26Q1EVM-PDK Software Reference........................16 6.1 Global Settings for ADC Control............................6.2 Register Map Configuration............................. 6.3 Analysis Tools.................................. 7 ADS131B26Q1EVM-PDK Bill of Materials, PCB Layout, and Schematics...............24 7.1 Bill of Materials (BOM)..............................7.2 PCB Layout..................................Schematics..................................29 List of Figures Figure 1-1. - Page 3 Table 3-1. PHI Connector Pin Functions............................9 Table 3-2. DEBUG Header Pins (J7)............................Table 5-1. Default Jumper Settings............................13 Table 5-2. Nominal Voltages: Default Configuration........................Table 7-1. ADS131B26Q1EVM-PDK Bill of Materials........................24 Trademarks LabVIEW ® is a registered trademark of National Instruments. All trademarks are the property of their respective owners.
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Page 4: Evm Overview
1 EVM Overview The evaluation kit includes the ADS131B26Q1EVM-PDK board and the precision host interface (PHI) controller board. The PHI board enables the accompanying computer software to communicate with the ADC over the universal serial bus (USB) for data capture and analysis. -
Page 5: Ads131B26Q1Evm-Pdk Quick-Start Guide
GUI software installation in Section 5.2. 2. Connect the ADS131B26Q1EVM-PDK to the PHI controller. Install the two screws as indicated in Figure 1-1. 3. Connect the PHI controller to your PC using the provided USB micro cable. Three LEDs illuminate on the PHI controller to indicate connectivity to the PC. -
Page 6: Terminal Blocks And Test Points
Ground clip for scope / multimeter AGND, AGNDA, and AGNDB Probe VNA or GPIO1A Shorted to AGND (default) VNA/GPIO1A Probe VNB or GPIO1B Shorted to AGND (default) VNB/GPIO1B ADS131B26Q1EVM-PDK Evaluation Module SBAU413 – OCTOBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 7: Adc1A And Adc1B
(ADC_AVDD) by installing the optional external VCM circuit shown in Figure 2-2. Figure 2-2 shows the input connections and resistor divider circuits for ADC2A. Figure 2-2. ADC2A Sequencer Input Circuits (Schematic) SBAU413 – OCTOBER 2022 ADS131B26Q1EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 8: Adc3A And Adc3B
(VPA and VPB). The negative voltage measurement inputs (VNA and VNB) are connected to AGND by default. Figure 2-3 shows the voltage input schematic for ADC3A. Figure 2-3. ADC3A Voltage Input Circuit (Schematic) ADS131B26Q1EVM-PDK Evaluation Module SBAU413 – OCTOBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 9: Digital Interface
There are two devices on the EVM with which the PHI controller communicates: the ADS131B26-Q1 (by SPI) and the EEPROM (by I C). The EEPROM comes preprogrammed with the information required to configure and initialize the ADS131B26Q1EVM-PDK GUI software. When the hardware is initialized, the EEPROM is no longer used. 3.1 Connection to the PHI Controller The ADS131B26Q1EVM-PDK communicates with the PHI controller through a shrouded, 60-pin connector (J9). -
Page 10: Digital Header
ADC digital sinc3 filter. For more information, see Section 4.1. Figure 3-1 shows a schematic of the external clock options. Figure 3-1. External ADC Clock Options (Schematic) ADS131B26Q1EVM-PDK Evaluation Module SBAU413 – OCTOBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 11: Power Supplies
ADS131B26-Q1 aligns with a null in the ADC sinc3 digital filter response and be significantly attenuated. Figure 4-1 shows the DC/DC converter and transformer driver circuits. Figure 4-1. DC/DC Converter and Transformer Driver Circuit (Schematic) SBAU413 – OCTOBER 2022 ADS131B26Q1EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 12: Adc Power Supplies
Proper component placement and solid ground pours are important to make sure that the lowest noise and highest accuracy is used in any precision ADC application. See Section 7.2 for more suggested layout practices. ADS131B26Q1EVM-PDK Evaluation Module SBAU413 – OCTOBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 13: Ads131B26Q1Evm-Pdk Initial Setup
Selects the transformer output as the APWR supply [2-3] Selects the transformer output as the DPWR supply Not installed The transformer driver is enabled Installed The onboard crystal oscillator is disabled SBAU413 – OCTOBER 2022 ADS131B26Q1EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 14: Evm Graphical User Interface (Gui) Software Installation
5.2 EVM Graphical User Interface (GUI) Software Installation Download the latest version of the EVM GUI installer from the Tools and Software folder of the ADS131B26Q1EVM-PDK and run the GUI installer to install the EVM GUI software on your computer. CAUTION Manually disable any antivirus software running on the computer before downloading the EVM GUI installer onto the local hard disk. -
Page 15: Figure 5-3. Device Driver Installation Wizard Prompts
Figure 5-4, if not already installed. Figure 5-4. LabVIEW Run-Time Engine Installation Verify that C:\Program Files (x86)\Texas Instruments\ADS131B26Q1EVM-PDK is available after these installations. SBAU413 – OCTOBER 2022 ADS131B26Q1EVM-PDK Evaluation Module Submit Document Feedback... -
Page 16: Ads131B26Q1Evm-Pdk Software Reference
Hardware box in the top-right area of the screen at any time. Pages Device Commands Data Capture Con gura on Clocks and Connec on Data Rate Status Figure 6-1. EVM GUI Global Input Parameters ADS131B26Q1EVM-PDK Evaluation Module SBAU413 – OCTOBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 17: Register Map Configuration
The Register Description view on the bottom-right describes the function and settings of the bit fields in the selected register, as described in the ADS131B26-Q1 data sheet. Figure 6-2. Register Map Configuration SBAU413 – OCTOBER 2022 ADS131B26Q1EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 18: Figure 6-3. Channel Configurations Register Page
• Current Source or Sink Mux • Current Source or Sink Value • Offset Calibration • Gain Calibration Figure 6-3. Channel Configurations Register Page ADS131B26Q1EVM-PDK Evaluation Module SBAU413 – OCTOBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 19: Analysis Tools
• Positive input Figure 6-4. Sequencer Configurations Register Page 6.3 Analysis Tools This section describes the analysis tools included with the ADS131B26Q1EVM-PDK GUI. These tools include Time Domain Display, Spectral Analysis, Histogram Analysis, and Sequencer Analysis. Section 6.3.1 through Section 6.3.3 describe the data collection and analysis features of the ADS131B26-Q1 EVM GUI. -
Page 20: Figure 6-5. Time Domain Display Tool
Switching pages to any of the other Analysis tools described in the subsequent sections exports the same data for viewing without having to recollect the data. Figure 6-5. Time Domain Display Tool ADS131B26Q1EVM-PDK Evaluation Module SBAU413 – OCTOBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 21: Figure 6-6. Spectral Analysis Tool
AGNDB at 32 kSPS (OSR13B = 128). As a result, the noise floor of ADC13B is only plotted from DC to 16 kHz. Figure 6-6. Spectral Analysis Tool SBAU413 – OCTOBER 2022 ADS131B26Q1EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 22: Figure 6-7. Histogram Analysis Tool
ADC1A and ADC1B are configured for Gain = 4, and ADC3A and ADC3B are configured for Gain = 1. Figure 6-7. Histogram Analysis Tool ADS131B26Q1EVM-PDK Evaluation Module SBAU413 – OCTOBER 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 23: Figure 6-8. Sequencer Analysis Tool
Codes or Voltage (V) by using the radio buttons on the bottom-right. Figure 6-8 shows an example sequencer data capture. Figure 6-8. Sequencer Analysis Tool SBAU413 – OCTOBER 2022 ADS131B26Q1EVM-PDK Evaluation Module Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 24: Ads131B26Q1Evm-Pdk Bill Of Materials, Pcb Layout, And Schematics
ADS131B26Q1EVM-PDK Bill of Materials, PCB Layout, and Schematics www.ti.com 7 ADS131B26Q1EVM-PDK Bill of Materials, PCB Layout, and Schematics 7.1 Bill of Materials (BOM) Table 7-1 lists the ADS131B26Q1EVM-PDK bill of materials. Table 7-1. ADS131B26Q1EVM-PDK Bill of Materials Designator Quantity Value... - Page 25 ADS131B26Q1EVM-PDK Bill of Materials, PCB Layout, and Schematics Table 7-1. ADS131B26Q1EVM-PDK Bill of Materials (continued) Designator Quantity Value Description PackageRefe PartNumber Manufacturer Alternate Alternate rence PartNumber Manufacturer H7, H8 Machine RM3X4MM Screw Pan 2701 HEXSEAL PHILLIPS M3 J1, J3, J4, J5 4 Terminal 20.5x8.2x6.5...
- Page 26 ADS131B26Q1EVM-PDK Bill of Materials, PCB Layout, and Schematics www.ti.com Table 7-1. ADS131B26Q1EVM-PDK Bill of Materials (continued) Designator Quantity Value Description PackageRefe PartNumber Manufacturer Alternate Alternate rence PartNumber Manufacturer R13, R14, RES, 0, 1%, RMCF0603ZT Stackpole R21, R22, 0.1 W, AEC-...
- Page 27 ADS131B26Q1EVM-PDK Bill of Materials, PCB Layout, and Schematics Table 7-1. ADS131B26Q1EVM-PDK Bill of Materials (continued) Designator Quantity Value Description PackageRefe PartNumber Manufacturer Alternate Alternate rence PartNumber Manufacturer TP3, TP4, Terminal, Keystone159 1598-2 Keystone TP7, TP9 Turret, TH, Triple Test Point,...
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Page 28: Pcb Layout
ADS131B26Q1EVM-PDK Bill of Materials, PCB Layout, and Schematics www.ti.com 7.2 PCB Layout Figure 7-1 through Figure 7-6 show the ADS131B26Q1EVM-PDK PCB layout. Figure 7-2. Top Layer Figure 7-1. Top Silkscreen Figure 7-3. Ground Layer Figure 7-4. Power Layer Figure 7-6. Bottom Silkscreen Figure 7-5. -
Page 29: Schematics
ADS131B26Q1EVM-PDK Bill of Materials, PCB Layout, and Schematics 7.3 Schematics Figure 7-7 Figure 7-8 contain the schematics for the ADS131B26Q1EVM-PDK. ADC2 inputs: ADC2A_V7A ADC2A_V1A ADC2A_V3A ADC2A_V5A ADC2A_V6A ADC_AVDD VADC_HV ADC_APWR ADC_APWR ADC_AVDD Unipolar ADC2A_V5A ADC2y_V1y/2y ADC2A_V4A 10.5k 30.9k 13.7k... -
Page 30: Figure 7-8. Digital Isolators, Dc/Dc Power Supply, External Clock, And Phi Controller
ADS131B26Q1EVM-PDK Bill of Materials, PCB Layout, and Schematics www.ti.com ISO_3V3 R104 1.00k ISO_GND ISO_ADC_CLK ISO_3V3 CLOCK OUT 1CLK 1CLK OSC_EN ISO_GND 0.1µF EXT_CLK SN74AUP2G80DCUR SN74AUP2G80DCUR ISO_GND 2CLK 2CLK EVM_RAW_5V ISO_VCC ISO_3V3 R100 XFMR_CLK ISO_VCC ISO_GND ISO_VCC SN74AUP2G80DCUR SN74AUP2G80DCUR ISO_VCC ISO_3V3... - Page 31 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 32 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 33 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 34 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 35 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 © 2019, Texas Instruments Incorporated...
- Page 36 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 © 2022, Texas Instruments Incorporated...
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