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User's Guide

SBOU121–June 2012

INA827EVM

This user's guide describes the characteristics, operation, and use of the evaluation module (EVM) for the

INA827. 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) layouts, and a

complete bill of materials (BOM). Throughout this document the terms evaluation board, evaluation

module, and EVM are synonymous with the INA827EVM.

Contents

1 Related Documentation from Texas Instruments ....................................................................... 1

2 Introduction and Overview ................................................................................................. 2

3 Quick Start ................................................................................................................... 4

4 EVM Components ........................................................................................................... 7

5 Schematic .................................................................................................................... 8

6 Bill of Materials .............................................................................................................. 9

List of Figures

1 INA827EVM Schematic Side .............................................................................................. 2

2 INA827EVM Component Side............................................................................................. 3

3 INA827EVM: Dual-Supply Configuration................................................................................. 4

4 INA827EVM: Single-Supply Configuration, Direct REF Connection ................................................. 5

5 INA827EVM: Single-Supply Configuration, Buffered REF Connection .............................................. 6

6 INA827EVM Schematic .................................................................................................... 8

1 Related Documentation from Texas Instruments

The following documents provide information regarding Texas Instruments' integrated circuits and support

tools for the INA827EVM. This user's guide is available from the TI web site under literature number

SBOU121. Any letter appended to the literature number corresponds to the document revision that is

current at the time of the writing of this document. 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.

Summary of content (15 pages)

PAGE 1
User's Guide SBOU121 – June 2012 INA827EVM This user's guide describes the characteristics, operation, and use of the evaluation module (EVM) for the INA827. 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) layouts, and a complete bill of materials (BOM). Throughout this document the terms evaluation board, evaluation module, and EVM are synonymous with the INA827EVM.
PAGE 2
Introduction and Overview www.ti.com 2 Introduction and Overview 2.1 INA827 The INA827 is a low-power, wide-supply voltage instrumentation amplifier that can operate in both singleand dual-supply configurations. A single external resistor sets the gain from 5 to 1000. The device operates with a supply voltage between 2.7 V and 36 V, and is available in an MSOP-8 package. 2.2 INA827EVM The INA827EVM is intended to provide basic functional evaluation of the INA827.
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Introduction and Overview www.ti.com Figure 2.
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Quick Start 3 www.ti.com Quick Start The procedures presented in this section describe how to quickly set up and use the INA827EVM for evaluation in dual-supply and single-supply configurations. 3.1 Dual Supply Make the following connections to set up the INA827EVM for dual-supply operation. 1. 2. 3. 4. 5. +15 V to V+ test point. –15 V to V– test point. Ground to REF test point or install a 0-Ω resistor in R5. Differential input (for example, a 1-VPP sine wave) to V–IN and V+IN test points.
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Quick Start www.ti.com 3.2 Single Supply Make the following connections to set up the INA827EVM for single-supply operation with a direct connection for the reference voltage. 1. 2. 3. 4. 5. +5 V to V+ test point. GND to V– test point. +2.5 V to REF test point. Differential input (for example, a 0.1-VPP sine wave) to V–IN and V+IN test points. Oscilloscope to VO test point. Ensure that R1 = R2 = RO = 0 Ω and that RG , R5, and CO are not populated.
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Quick Start www.ti.com Make the following connections to set up the INA827EVM for single-supply operation with a buffered reference voltage. This example uses an OPA376 as the buffer operational amplifier. Depending on the application, alternative single-supply buffer operational amplifiers include the OPA330 and OPA378. The OPA277 is a good choice for high-voltage applications. A buffered configuration is useful when the source impedance is high (for example, a voltage divider).
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EVM Components www.ti.com 4 EVM Components This section summarizes the INA827EVM components. 4.1 Power Power is applied to the INA827 with test points V+ and V–. For the unpopulated device (U2), power is applied using test points OAV+ and OAV–. 4.2 Inputs Inputs are applied to the INA827 using test points V+IN and V–IN. Alternately, they can be applied by populating the input SMA connectors (J1 and J2). The inputs for U2 are applied through test points OAVIN+ and OAVIN–. 4.2.
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Schematic 4.6 www.ti.com Miscellaneous C6, C7, C9, and C10 are the supply bypass capacitors for the INA827. Similarly, C4, C5, C11, and C12 can be populated to provide supply bypassing for U2. C8 is available for the use of an X2Y® capacitor. 5 Schematic Figure 6 shows the schematic for the INA827EVM PCB. V+ C10 10 PF U1 V±IN INA827 R1 C1 ±IN VO +VS 0 SMA REF RG RG + C2 RO VOUT RG V+IN 0 CO REF SMA V± R2 SMA C7 0.1 PF ±VS +IN 0 R5 C9 C3 10 PF C6 0.
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Bill of Materials www.ti.com 6 Bill of Materials Table 1 provides the parts list for the INA827EVM. Table 1. INA827EVM Bill of Materials Count RefDes Value Description N/A INA827, MSOP-8 0Ω Resistor, 1/4W, 1206 Part Number MFR INA827AIDGK Texas Instruments RMCF1206ZT0R00 Stackpole Electronics 1 U1 3 R1, R2, RO 2 C9, C10 10 µF Ceramic bypass capacitors, 50 V, X5R, 10%, 1206 GRM31CR61H106KA2L Murata 2 C6, C7 0.
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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.
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EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods.
PAGE 12
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.
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【Important Notice for Users of this Product in Japan】】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product 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.
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EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use.
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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. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.