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User’s Guide

INA232EVM, INA234EVM and INA236EVM

ABSTRACT

This user’s guide describes the characteristics, operation, and use of the INA232, INA234 and INA236
evaluation modules (EVMs). These EVMs are designed to evaluate the performance of the INA232, INA234 and
INA236. Throughout this document, the terms evaluation board, evaluation module, and EVM are synonymous
with the INA232EVM, INA234EVM and INA236EVM. This document includes a schematic, reference printed
circuit board (PCB) layouts, and a complete bill of materials (BOM).

SBOU264B – MAY 2021 – REVISED DECEMBER 2022

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INA232EVM, INA234EVM and INA236EVM

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Copyright © 2022 Texas Instruments Incorporated

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Содержание INA234EVM

Страница 1: ...e INA232 INA234 and INA236 Throughout this document the terms evaluation board evaluation module and EVM are synonymous with the INA232EVM INA234EVM and INA236EVM This document includes a schematic reference printed circuit board PCB layouts and a complete bill of materials BOM www ti com SBOU264B MAY 2021 REVISED DECEMBER 2022 Submit Document Feedback INA232EVM INA234EVM and INA236EVM 1 Copyright...

Страница 2: ...tal Circuitry 19 6 Schematics PCB Layout and Bill of Materials 20 6 1 Schematics 20 6 2 PCB Layout 23 6 3 Bill of Materials 25 7 Revision History 27 1 Trademarks Chrome is a trademark of Google LLC Firefox is a trademark of Mozilla Foundation All trademarks are the property of their respective owners Table of Contents www ti com 2 INA232EVM INA234EVM and INA236EVM SBOU264B MAY 2021 REVISED DECEMBE...

Страница 3: ...utput pin ALERT The output can be interfaced with a multitude of micro controllers MCUs with a standard I2C interface Table 2 1 Device Summary PRODUCT DIGITAL PROTOCOL ADC RESOLUTION MAX GAIN ERROR MAX OFFSET VOLTAGE INA232 I2C 16 bit 0 25 20 µV INA234 I2C 12 bit 0 5 100 µV INA236 I2C 16 bit 0 1 5 µV 2 1 Kit Contents Table 2 2 lists the contents of the EVM kit Contact the nearest Texas Instruments...

Страница 4: ...re The EVM is an easy to use platform for evaluating the main features and performance of the INA23x The EVM supports current measurements up to 10 amps and includes a graphical user interface GUI used to read and write device registers as well as view and save results data The EVM is intended to provide basic functional evaluation of the devices The layout is not intended to be a model for the ta...

Страница 5: ...n either the Chrome or Firefox browser 6 Connect the GND reference of the external system to the GND node of the EVM pin 1 of J1 7 Provide a differential input voltage signal to the IN and IN nodes by connecting the signal leads to J1 pin 5 or 6 and J1 pin 3 or 4 on the EVM as explained in Section 4 2 3 4 2 EVM Operation To use the EVM with the SCB Controller sold separately connect the EVM as sho...

Страница 6: ...ware manually a Plug in the SCB controller to the PC b Launch the GUI c It is possible that the MCU has already entered DFU mode If so the GUI may notify you and try to update the firmware to the latest version d If it does not update automatically go to File Program Device 2 If that does not work or if the Program Device button is grayed out manually configure the MCU on the SCB Controller to be ...

Страница 7: ...at the previously mentioned driver was installed successfully to ensure that everything works properly and that the GUI can update the EVM firmware if necessary 2 Check to make sure the EVM SCB Controller unit is plugged into the PC then go to the previously provided GUI link 3 Click the GUI Composer application Figure 4 4 to launch the GUI from the web browser www ti com Operation SBOU264B MAY 20...

Страница 8: ... the GUI for offline use 4 2 1 3 2 GUI to EVM Connection To operate the GUI follow these steps 1 Connect to and launch the GUI as described in Section 4 2 1 3 1 2 Check to make sure that the EVM connected to the GUI then close the README md file page to initiate the connection If successful the Hardware Connected message should be visible near the bottom left corner of the GUI as in Figure 4 6 Ope...

Страница 9: ...nt hardware COM ports under Options Serial Port as shown in Figure 4 8 Figure 4 8 Change Serial Port c If the hardware still does not connect make sure you are using the correct GUI EVM combination i If you are using the correct GUI EVM combination you may need to reprogram the firmware of the SCB as described in Firmware Debug www ti com Operation SBOU264B MAY 2021 REVISED DECEMBER 2022 Submit Do...

Страница 10: ...VM connection see Section 4 2 1 3 2 as well as access helpful resources through the buttons on the bottom see Figure 4 9 Figure 4 9 Home Tab Links 4 2 2 2 Configuration Tab To do the initial setup for each connected EVM click the Configuration icon on the menu to the left Figure 4 10 shows an example of the configuration tool which may change based on the device connected Figure 4 10 Configuration...

Страница 11: ...ield is left blank then SHUNT_CAL can be adjusted manually and the tool will tell you the True Max Current that can be measured with the EVM CURRENT_LSB This is the calculated CURRENT_LSB value in Amps This field gets populated automatically from the Max Expected Current field This field can be changed manually if desired and changes will filter downward SHUNT_CAL Calculated value for SHUNT_CAL ba...

Страница 12: ...ly written to the device If desired you can change the Immediate Write setting to Deferred Write to only allow writing when you are ready You can modify writable register values from any of these methods Through the widget settings in the Field View section on the right Changing the Value directly with either hex or decimal values Double clicking on any individual bit Turning on Auto Read will onl...

Страница 13: ...ttach multiple EVMs together Changing this here also changes the same setting in the Configuration tab The GUI only supports one EVM device type at a time up to 4 EVMs total Switch settings Use the onboard switch es to select a different address chip select for each EVM Set the switch settings in the GUI to match the setting for each connected EVM EVM 1 will automatically populate with the lowest ...

Страница 14: ...the CLEAR PLOT button next to each plot to clear the data from just that plot Samples Change the number in this box to change the number of samples shown in each plot Changing this number clears out the plot buffers so the plots will be cleared on the next read Y Axis Options Manual Scale Checking this box will set all EVM results in this plot to the same scale value specified by the Max and Min f...

Страница 15: ... illustration In screw terminal J1 IN and IN are swapped for the INA232EVM see Figure 4 15 a If the differential voltage supply is a floating supply connect a 0 3 V to 48 V common mode voltage leave powered off until finished setting up to the inputs by connecting the positive lead of the external voltage source to either the IN or IN terminal This action effectively raises the absolute common mod...

Страница 16: ... terminals in series with the load while powered off Figure 4 16 IN and IN Wiring With a Shunt Resistor WARNING If measuring current first make sure that the equipment shunt resistor wires connectors and so on can support the amperage and power dissipation Secondly make sure that the current flowing through J1 does not exceed 10 A Failure to do so can result in damage to the EVM or personal injury...

Страница 17: ...ess 0x1 some valid commands include rreg 1 rreg 01 rreg 0x01 When 0x is used the x must be lower case For the previous example the EVM would return the results in JSON format acknowledge rreg 0x01 register address 1 value 3 evm_state idle Write register format wreg ADR VAL Where ADR and VAL are in hex and wreg is always lower case Register addresses and values can be in upper or lower case and do ...

Страница 18: ...NT and POWER every 10 ms for four INA236s with EVM 1 SW0 GND EVM 2 SW0 VS EVM 3 SW0 SDA and EVM 4 SW0 SCL you would send collect 10 108 12816 4 For this example the EVM would return the acknowledgment and status in JSON format acknowledge collect 10 108 12816 4 evm_state collecting Note for the rreg and wreg functions above the EVM will return collecting instead of idle if collecting The USB BULK ...

Страница 19: ...and IN terminals of J1 If desired a differential voltage can be applied directly for measurement tests C3 R2 and R3 combine to make an optional input filter R2 and R3 are populated with 0 Ω resistors by default When using input filtering take into account the input bias current of the device 5 3 Digital Circuitry This section describes the digital circuitry around the device 5 3 1 I2C J2 and J3 ar...

Страница 20: ... included with the EVMs GND 0 R2 0 R3 100V 0 1uF C3 GND GND 1 2 3 4 5 6 J1 TP7 SDA TP8 SCL TP10 A0 TP11 ALERT PD2 TP5 GND TP2 IN TP4 IN TP3 VS 0 1uF C2 D2 10k R7 3V3 3V3 4 7k R8 D1 10k R4 4 7k R5 4 7k R6 3V3 3V3 PN5 PN4 PN5 PN4 GND 3V3 GND MNT_1 7 MNT_2 8 MNT_3 9 MNT_4 10 1 2 3 5 6 4 SW0 CUS 14TB 0 01 R1 5V 3V3 1 3 5 6 4 2 7 9 10 8 12 11 J2 1 3 5 7 9 11 J3A 2 4 6 8 10 12 J3B GND 5V 3V3 GND PN4 PN5...

Страница 21: ...ese assemblies must comply with workmanship standards IPC A 610 Class 2 unless otherwise speci ed Variant Label Table Variant Label Text 001 INA236EVM 002 INA234EVM CE Mark LOGO PCB FCC disclaimer LOGO PCB WEEE logo Size 0 65 x 0 20 PCB Label LBL1 THT 14 423 10 LOGO6 CAUTION HOT SURFACE H2 SJ5382 H3 SJ5382 H1 SJ5382 H4 SJ5382 Figure 6 2 SENS079 Hardware Schematic www ti com Schematics PCB Layout a...

Страница 22: ...he SENS090 variant INA232EVM Figure 6 3 SENS090 Schematic Schematics PCB Layout and Bill of Materials www ti com 22 INA232EVM INA234EVM and INA236EVM SBOU264B MAY 2021 REVISED DECEMBER 2022 Submit Document Feedback Copyright 2022 Texas Instruments Incorporated ...

Страница 23: ...ENS079 Bottom View Figure 6 7 SENS079 Bottom Layer 6 2 2 SENS090 INA232EVM This section shows the PCB layers of the SENS090 variant INA232EVM Figure 6 8 SENS090 Top View Figure 6 9 SENS090 Top Layer www ti com Schematics PCB Layout and Bill of Materials SBOU264B MAY 2021 REVISED DECEMBER 2022 Submit Document Feedback INA232EVM INA234EVM and INA236EVM 23 Copyright 2022 Texas Instruments Incorporate...

Страница 24: ...igure 6 11 SENS090 Bottom Layer Schematics PCB Layout and Bill of Materials www ti com 24 INA232EVM INA234EVM and INA236EVM SBOU264B MAY 2021 REVISED DECEMBER 2022 Submit Document Feedback Copyright 2022 Texas Instruments Incorporated ...

Страница 25: ...J1 1 TERM BLK 6POS SIDE ENTRY 5MM PCBASSEMBLY NOTE Trim leads per ZZ5 HDR6 691137710006 Wurth Electronics J2 1 Receptacle 2mm 6x2 Gold R A TH Receptacle 2mm 6x2 R A TH NPPN062FJFN RC Sullins Connector Solutions J3 1 Connector Header Through Hole Right Angle 12 position 0 079 2 00mm HDR12 NRPN062PARN RC Sullins Connector Solutions LBL1 1 Thermal Transfer Printable Labels 0 650 W x 0 200 H 10 000 pe...

Страница 26: ...er roll PCB Label 0 650 x 0 200 inch THT 14 423 10 Brady R2 R3 2 0 RES 0 5 0 125 W 0603 0603 MCT06030Z0000ZP500 Vishay Beyschlag R4 R7 2 10k RES 10 k 5 0 063 W AEC Q200 Grade 0 0402 0402 CRCW040210K0JNED Vishay Dale R5 R6 R8 3 4 7k RES 4 7 k 5 0 063 W AEC Q200 Grade 0 0402 0402 CRCW04024K70JNED Vishay Dale SH J4 1 Shunt 2 54mm Gold Black Shunt 2 54mm Black 60900213421 Wurth Elektronik SW0 1 Slide ...

Страница 27: ...2022 to Revision B December 2022 Page Added the INA232EVM to the document 3 Changes from Revision May 2021 to Revision A February 2022 Page Removed SCB as a kitted item 3 www ti com Revision History SBOU264B MAY 2021 REVISED DECEMBER 2022 Submit Document Feedback INA232EVM INA234EVM and INA236EVM 27 Copyright 2022 Texas Instruments Incorporated ...

Страница 28: ...other 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 techniques are used to the extent TI deems necessary TI does not test all parameters of each EVM User s claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects...

Страница 29: ... 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 installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation...

Страница 30: ...y for convenience and should be verified by User 1 Use EVMs in a shielded room or any other test facility as defined in the notification 173 issued by Ministry of Internal Affairs and Communications on March 28 2006 based on Sub section 1 1 of Article 6 of the Ministry s Rule for Enforcement of Radio Law of Japan 2 Use EVMs only after User obtains the license of Test Radio Station as provided in R...

Страница 31: ... 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 electrical shock hazard User assumes all responsibility and liability for any improper or unsafe handling or use of the EVM by User or its employees affiliates contractors or designees 4 4 User assumes all...

Страница 32: ...OR 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 Furthermore no return of EVM s will be accepted if the package has been opened and no return of the EVM s will be accepted if they are damaged or otherwise not in a resalable condition If User feels it has...

Страница 33: ...o 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 display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for and you will fully indemn...

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