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This user's guide describes the characteristics, operation, and use of the evaluation module (EVM) for the
INA149. The EVM is designed to evaluate the performance of the device in both single and dual-supply
configurations. This document also includes the schematic, printed circuit board (PCB) layout, and a bill of
materials (BOM). Throughout this document the terms evaluation board, evaluation module, and EVM are
synonymous with the INA149EVM.
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
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INA149EVM Reference Voltage Schematic
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INA149EVM Power Schematic
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SBOU119 - November 2011
Submit Documentation Feedback
WARNING
Section 1.3
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Copyright © 2011, Texas Instruments Incorporated
before using the EVM.
Contents
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List of Figures
User's Guide
SBOU119 - November 2011
INA149EVM
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INA149EVM
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Summary of Contents for Texas Instruments INA149
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Page 1: Table Of Contents
This user's guide describes the characteristics, operation, and use of the evaluation module (EVM) for the INA149. The EVM is designed to evaluate the performance of the device in both single and dual-supply configurations. This document also includes the schematic, printed circuit board (PCB) layout, and a bill of materials (BOM). -
Page 2: Introduction And Warnings
It is available in an SO-8 package. INA149EVM The INA149EVM is intended to provide basic functional evaluation of the INA149. It provides the following features: • Easy access to pertinent nodes with test points and terminal blocks •... - Page 3 Evaluation Module Limitations & Warnings As a result of the high common-mode input voltage rating of the INA149, evaluation of the device often involves high-voltage operation. As a difference amplifier, it may also be used in current-sensing applications. In addition to voltage and current limitations, proper electrostatic discharge precautions are recommended.
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Page 4: Ina149Evm Hardware
Common-mode cutoff frequency: ⋅ π ⋅ Differential-mode cutoff frequency: − ⋅ π ⋅ Output filter cutoff frequency: − ⋅ π ⋅ SBOU119 – November 2011 INA149EVM Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated... - Page 5 Reference Voltage Schematic Figure 3 shows that the reference voltage can be applied to the INA149 in a variety of ways. The INA149 has two pins for reference voltages: REFA, REFB. Most applications require REFA and REFB to be shorted. This functionality is accomplished with JMP4. In dual-supply applications, the reference voltages are typically connected to ground.
- Page 6 Test points V+ and V– have been provided to ensure the desired supply voltage is being applied to the device. D1 is a transient voltage suppressor (TVS) diode. D1 aids in protecting the INA149 from supply voltages in excess of 36 V (±18 V). JMP1 allows the user to short the negative supply voltage (V–) to ground, which provides a simple method for operating the device with a single supply.
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Page 7: Ina149Evm Complete Schematic
2 -IN CON_OUT VOUT 0ohm INA149_SO8 CON1 REFA .1uF Do not populate JMP2 0ohm JMP3 2 -IN JMP3 0ohm REFV- 0ohm .1uF Figure 5. INA149EVM Complete Schematic SBOU119 – November 2011 INA149EVM Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated... - Page 8 JMP2 This jumper allows the REFA pin on the INA149 to be connected to ground or the external reference op amp. The shunt on the jumper can be removed as well to allow an external reference to be attached to the REFA test point.
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Page 9: Ina149Evm Pcb Layout
NOTE: Board layout is not to scale. This figure is intended to show how the board is laid out; it is not intended to be used for manufacturing INA149EVM PCBs. SBOU119 – November 2011 INA149EVM Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated... -
Page 10: Bill Of Materials
Newer revisions may be available from the TI web site, or call the Texas Instruments' Literature Response Center at (800) 477-8924 or the Product Information Center at (972) 644-5580. When ordering, identify the document by both title and literature number. Related Documentation... - Page 11 Evaluation Board/Kit Important Notice Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
- Page 12 Any exceptions to this are strictly prohibited and unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory authorities, which is responsibility of user including its acceptable authorization.
- Page 13 FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. 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.
- Page 14 Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan. Texas Instruments Japan Limited (address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan http://www.tij.co.jp...
- Page 15 FDA Class III or similar classification, then you must specifically notify TI of such intent and enter into a separate Assurance and Indemnity Agreement. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2012, Texas Instruments Incorporated...
- Page 16 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue.
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