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SBOU216A – October 2018 – Revised June 2020

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INA901EVM-CVAL Evaluation Module User's Guide

User's Guide

SBOU216A – October 2018 – Revised June 2020

INA901EVM-CVAL Evaluation Module User's Guide

This user’s guide describes the characteristics, operation, and use of the INA901EVM-CVAL evaluation
module (EVM). This EVM is designed to evaluate the performance of the INA901-SP voltage-output,
current shunt monitor in a variety of configurations. Throughout this document, the terms evaluation board,
evaluation module, and EVM are synonymous with the INA901EVM-CVAL. This document also includes a
schematic, reference printed-circuit board (PCB) layouts, and a complete bill of materials (BOM).

WARNING

Danger: HIGH VOLTAGE! This evaluation board is intended for
professional use only. It has exposed high voltages. Do not
operate this board without proper high-voltage/high-current safety
practices.

Read

the

General

Texas

Instruments

High

Voltage

Evaluation (TI HV EVM) User Safety Guidelines

section before using

the EVM.

Summary of Contents for INA901EVM-CVAL

Page 1: ...NA901 SP voltage output current shunt monitor in a variety of configurations Throughout this document the terms evaluation board evaluation module and EVM are synonymous with the INA901EVM CVAL This document also includes a schematic reference printed circuit board PCB layouts and a complete bill of materials BOM WARNING Danger HIGH VOLTAGE This evaluation board is intended for professional use on...

Page 2: ... Options 10 5 3 First Order and Sallen Key Filter Options 10 5 4 Comparator 10 5 5 Unused Comparator Channel and Best Practices 10 5 6 Comparator Disconnect 10 6 Schematic PCB Layout and Bill of Materials 11 6 1 INA901EVM CVAL Schematics 11 6 2 PCB Layer Plots 12 6 3 Bill of Materials 16 List of Figures 1 High Side Setup Using Onboard Shunt Resistor 7 2 High Side Setup Using An External Shunt Resi...

Page 3: ...the HV EVM 1 Work Area Safety a Keep work area clean and orderly b Qualified observer s must be present anytime circuits are energized c Effective barriers and signage must be present in the area where the TI HV EVM and its interface electronics are energized indicating operation of accessible high voltages may be present for the purpose of protecting inadvertent access d All interface circuits po...

Page 4: ... C to 125 C QML V qualified and is offered in an 8 pin CFP package 2 2 INA901EVM CVAL Overview The INA901EVM CVAL is designed to demonstrate the functionality and performance of the INA901 SP The board contains a footprint for a size 2512 surface mount shunt resistor It can also be operated with an external shunt resistor or by simply applying differential voltages to the inputs The board also com...

Page 5: ...r such circumstances all proper safety practices must be followed Do not apply less than 15 V or more than 65 V 4 1 2 High Current An unpopulated footprint is provided for the user to install an onboard shunt resistor The shunt resistor traces have a maximum current rating of 10 A Ensure that the power rating of the resistor is sufficient for the application 4 1 3 Board Component Grades All compon...

Page 6: ...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 hot surfaces 55 C damage to the EVM or personal injury The shunt resistor will become hot during use Ensure proper precautions are taken to prevent contact with R1 durin...

Page 7: ...e sources while powered off You will need to ensure proper logical order to test either the high side or low side application See TI Precision Labs Current Sense Amplifiers Design Considerations for additional information on proper application and orientation Figure 1 shows the correct connections for a high side application using this method Figure 1 High Side Setup Using Onboard Shunt Resistor S...

Page 8: ...e 2 shows the correct connections for a high side application using this method Ensure that you make the connections such that the sensing location is directly across the shunt and there will be no high current on the sensing path See TI Precision Labs Current Sense Amplifiers Shunt Resistor Layout for additional information Figure 2 High Side Setup Using An External Shunt Resistor Step 3 Power on...

Page 9: ...e inputs by connecting the positive lead of the external voltage source to the negative terminal of J1 and negative lead to a GND test point This action effectively raises the absolute common mode voltage of the input pins while still retaining a positive input differential signal Figure 3 shows how this supply setup should look when this is done Ensure that the supplies used to perform this are a...

Page 10: ...t the PRE OUT pin of U1 forms a first order filter between the PRE OUT and BUF IN stages of U1 By default C6 is not populated and R4 is populated with a 0 Ω resistor These values may be changed along with C5 to form a second order Sallen Key filter See the Device Functional Modes section of the INA901 SP Radiation Hardened 15 V to 65 V Common Mode Unidirectional Current Shunt Monitor Data Sheet fo...

Page 11: ...ND CMP_REF PRE_OUT BUF_IN CMPB_OUT CMPB_IN CMPB_IN V 15k R11 DNP GND www ti com Schematic PCB Layout and Bill of Materials 11 SBOU216A October 2018 Revised June 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated INA901EVM CVAL Evaluation Module User s Guide 6 Schematic PCB Layout and Bill of Materials NOTE Board layouts are not to scale These figures are intended...

Page 12: ... 2018 Revised June 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated INA901EVM CVAL Evaluation Module User s Guide 6 2 PCB Layer Plots Figure 5 through Figure 8 illustrate the INA901EVM CVAL PCB layouts Figure 5 INA901EVM CVAL Top Overlay ...

Page 13: ...out and Bill of Materials 13 SBOU216A October 2018 Revised June 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated INA901EVM CVAL Evaluation Module User s Guide Figure 6 INA901EVM CVAL Top Copper ...

Page 14: ...of Materials www ti com 14 SBOU216A October 2018 Revised June 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated INA901EVM CVAL Evaluation Module User s Guide Figure 7 INA901EVM CVAL Bottom Copper ...

Page 15: ...t and Bill of Materials 15 SBOU216A October 2018 Revised June 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated INA901EVM CVAL Evaluation Module User s Guide Figure 8 INA901EVM CVAL Bottom Overlay ...

Page 16: ...eystone Keystone_575 4 Header 100mil 2x1 Gold TH J5 PBC02SAAN 1 Sullins Connector Solutions Sullins 100mil 1x2 230 mil above insulator RES 0 5 0 125 W AEC Q200 Grade 0 0805 R2 R3 R4 R5 ERJ 6GEY0R00V 4 Panasonic 0805 0 RES 15 k 5 0 125 W AEC Q200 Grade 0 0805 R6 R7 R10 ERJ 6GEYJ153V 3 Panasonic 0805 15k RES 10 0 k 1 0 25 W AEC Q200 Grade 0 0805 R8 RNCP0805FTD10K0 1 Stackpole Electronics Inc 0805 10...

Page 17: ...tation Feedback Copyright 2018 2020 Texas Instruments Incorporated Revision History Revision History NOTE Page numbers for previous revisions may differ from page numbers in the current version Changes from Original October 2018 to A Revision Page Sample History element for revision A 1 ...

Page 18: ...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...

Page 19: ... 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...

Page 20: ...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...

Page 21: ... 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...

Page 22: ...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...

Page 23: ...se resources are subject to 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...

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