User's Guide SBOU122 - September 2013 Universal Instrumentation Amplifier Evaluation Module This user's guide describes the characteristics, operation, and use of two evaluation modules (EVMs) that are compatible with a variety of instrumentation amplifiers (IAs). The schematics and bills of material (BOM) are identical for both EVMs. The only difference is that one EVM is compatible with devices in MSOP-8 (DGK) packages, and the second EVM is compatible with devices in SO-8 (D) packages. They are designed to evaluate the performance of the devices in both single- and dual-supply configurations. This document includes the schematic, printed circuit board (PCB) layouts, and BOM. Throughout this document the terms evaluation board, evaluation module, and EVM are synonymous with the Universal IA EVM. 1 2 3 4 5 6 7 Contents Overview ..................................................................................................................... 2 PCB Layout .................................................................................................................. 3 Schematic .................................................................................................................... 5 EVM Components ........................................................................................................... 6 Quick Start ................................................................................................................... 7 Bill of Materials ............................................................................................................. 10 Related Documentation from Texas Instruments ..................................................................... 10 List of Figures 1 IA Pinout ..................................................................................................................... 2 2 Universal IA EVM Schematic Side (MSOP-8) ........................................................................... 3 3 Universal IA EVM Component Side (MSOP-8) ......................................................................... 3 4 Universal IA EVM Schematic Side (SO-8) ............................................................................... 4 5 Universal IA EVM Component Side (SO-8) ............................................................................. 4 6 Universal IA EVM Schematic .............................................................................................. 5 7 Dual-Supply Configuration ................................................................................................. 7 8 Single-Supply Configuration, Direct REF Connection .................................................................. 8 9 Single-Supply Configuration, Buffered REF Connection............................................................... 9 X2Y is a registered trademark of X2Y Attenuators LLC. All other trademarks are the property of their respective owners. SBOU122 - September 2013 Submit Documentation Feedback Universal Instrumentation Amplifier Evaluation Module Copyright (c) 2013, Texas Instruments Incorporated 1 Overview www.ti.com 1 Overview 1.1 Features These EVMs are intended to provide basic functional evaluation of the amplifiers shown in Table 1 with the pinout shown in Figure 1. The EVMs provide the following features: * * * * * 1.2 Intuitive evaluation with the silkscreen schematic Easy access to nodes with surface-mount test points Advanced evaluation with two prototype areas Reference voltage source flexibility Convenient input and output filtering IA Pinout The EVMs are intended to evaluate IAs that have the pinout shown in Figure 1. U1 IA RG 1 8 RG IN 2 7 +VS +IN 3 6 VOUT VS 4 5 REF + Figure 1. IA Pinout 1.3 Compatible Devices Devices that are compatible with at least one of the EVMs are shown in Table 1. Table 1. Compatible Devices Device MSOP-8 (DGK) EVM INA118 X INA121 X INA122 X INA126 2 SO-8 (D) EVM X X INA128 X INA129 X INA141 X INA155 X INA156 X INA333 X Universal Instrumentation Amplifier Evaluation Module Copyright (c) 2013, Texas Instruments Incorporated X SBOU122 - September 2013 Submit Documentation Feedback PCB Layout www.ti.com 2 PCB Layout The schematic and component sides of the MSOP-8 EVM are shown in Figure 2 and Figure 3, respectively. NOTE: Board layouts are not to scale. These figures are intended to show how the board is laid out; they are not intended to be used for manufacturing PCBs. Figure 2. Universal IA EVM Schematic Side (MSOP-8) Figure 3. Universal IA EVM Component Side (MSOP-8) SBOU122 - September 2013 Submit Documentation Feedback Universal Instrumentation Amplifier Evaluation Module Copyright (c) 2013, Texas Instruments Incorporated 3 PCB Layout www.ti.com The schematic and component sides of the SO-8 EVM are shown in Figure 4 and Figure 5, respectively. Figure 4. Universal IA EVM Schematic Side (SO-8) Figure 5. Universal IA EVM Component Side (SO-8) 4 Universal Instrumentation Amplifier Evaluation Module Copyright (c) 2013, Texas Instruments Incorporated SBOU122 - September 2013 Submit Documentation Feedback Schematic www.ti.com 3 Schematic Figure 6 shows the schematic for the PCB. RG V+ U1 C10 VIN IA R1 C1 RG 0 IN C2 V+IN R2 SMA 0.1 PF RG VO +VS RO + SMA C7 V 0 +IN VOUT VS REF REF 0 CO SMA C3 C9 R5 C6 GND 0.1 PF R3 OAV+ C13 C12 C4 U2 1 OAVIN+ OAVIN 8 R4 2 7 + OAV C11 3 6 4 5 C5 Figure 6. Universal IA EVM Schematic SBOU122 - September 2013 Submit Documentation Feedback Universal Instrumentation Amplifier Evaluation Module Copyright (c) 2013, Texas Instruments Incorporated 5 EVM Components 4 EVM Components 4.1 Power www.ti.com Power is applied to the device 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 device 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-. 4.2.1 Input Filtering R1, R2, and C1 through C3 provide the ability to apply common-mode and differential-mode filtering to the inputs. The cutoff frequencies for the filters are shown in Equation 1 and Equation 2. For best performance, make C2 approximately ten times larger than C1 and C3.. These calculations presume R1 = R2 and C1 = C3. 1 fc-cm = 2S u R1 u C1 Common-mode cutoff frequency: (1) fc-dm = Differential-mode cutoff frequency: 4.3 1 C1 * 2S R1 R2 C2 2 (c) (2) Output Access the output of the device with test point VO or by by populating the output SMA connector (J3). 4.3.1 Output Filtering RO and CO provide the ability to apply a single-pole RC output filter. The cutoff frequency of the output filter is calculated as shown in Equation 3: 1 fc-o = 2S u RO u CO (3) 4.4 Reference There are multiple methods of applying a reference voltage to the device. A straightforward approach is to apply a voltage to the REF test point with U2 unpopulated. If a buffered voltage is desired, U2 can be populated with an operational amplifier in an appropriate SO-8 package and pinout. If the reference voltage is GND, either R5 can be populated with a 0- resistor, or the REF test point can be connected to GND. 4.5 Prototype Area Two prototype areas are provided for flexible evaluation. They can be used, for example, to prototype a voltage divider for a buffered reference voltage, or to supply a direct reference voltage with a device such as the REF3225. 4.6 Miscellaneous C6, C7, C9, and C10 are the supply bypass capacitors for the device. C9 and C10 are prepopulated with 0.1 F capacitors that usually provide adequate power supply bypassing for U1. Refer to the instrumentation amplifier data sheet for further information. Similarly, C4, C5, C11, and C12 can be populated to provide supply bypassing for U2. Refer to the buffer amplifier data sheet for further information. C8 can be used with an X2Y(R) capacitor. 6 Universal Instrumentation Amplifier Evaluation Module Copyright (c) 2013, Texas Instruments Incorporated SBOU122 - September 2013 Submit Documentation Feedback Quick Start www.ti.com 5 Quick Start The procedures presented in this section describe how to quickly set up and use the Universal IA EVM for evaluation in dual-supply and single-supply configurations. 5.1 Dual-Supply Configuration Figure 7 shows an example of how to set up the EVM for dual-supply operation. V+ U1 C10 VIN IA 0.1 PF R1 RG 0 C7 IN VO +VS RO + R2 V +VS RG Input Signal V+IN + +IN VOUT VS REF 0 0 VS + C9 R5 C6 0 0.1 PF GND Figure 7. Dual-Supply Configuration The following connections were made: 1. +VS to V+ test point 2. -VS to V- test point 3. Install 0- resistor as R5 (or connect REF test point to GND) 4. Differential input signal connect to V-IN and V+IN test points 5. Observe output at VO test point Note that C9 and C10 are prepopulated with 0.1-F power-supply decoupling capacitors. Refer to the device data sheet for additional power-supply decoupling information. SBOU122 - September 2013 Submit Documentation Feedback Universal Instrumentation Amplifier Evaluation Module Copyright (c) 2013, Texas Instruments Incorporated 7 Quick Start 5.2 www.ti.com Single-Supply Configuration 5.2.1 Direct-Reference Connection Figure 8 shows an example of how to set up the EVM for single-supply operation with a direct voltage connection to the reference (REF pin). V+ U1 C10 VIN IA 0.1 PF R1 RG 0 + C7 RG IN VO +VS Input Signal RO + V+IN R2 V +IN VOUT VS REF REF 0 C9 +VS 0 + C6 VREF 0.1 PF Figure 8. Single-Supply Configuration, Direct REF Connection The following connections were made: 1. +VS to V+ test point 2. GND to V- test point 3. Reference voltage to REF test point 4. Differential input signal to V-IN and V+IN test points 5. Observe output at VO test point Note that C9 and C10 are prepopulated with 0.1-F power-supply decoupling capacitors. It is not required to remove C9 for proper single-supply operation. Refer to the device data sheet for additional powersupply decoupling information. 8 Universal Instrumentation Amplifier Evaluation Module Copyright (c) 2013, Texas Instruments Incorporated SBOU122 - September 2013 Submit Documentation Feedback Quick Start www.ti.com 5.2.2 Buffered-Reference Voltage Connection A buffered-reference configuration is useful when the source impedance is high (for example, a voltage divider). Buffering a high-impedance source with an operational amplifier provides a low-impedance source and preserves common-mode rejection. Figure 9 shows an example of how to set up the EVM for single-supply operation with a buffered-reference voltage connection. Depending on the application, desirable single-supply buffer operational amplifiers include the OPA330, OPA376, and OPA378. The OPA277 is a good choice for high-voltage applications. V+ U1 C10 VIN IA 0.1 PF R1 RG 0 C7 VO +VS Input Signal RO + R2 V +VS RG IN V+IN + +IN VOUT VS REF REF 0 0 C9 C6 0.1 PF OAV+ R3 C12 0 C4 + V+OPA U2 OPA 1 OAVIN+ 8 2 + + VREF 7 OAV C11 3 6 4 5 C5 Figure 9. Single-Supply Configuration, Buffered REF Connection The following connections were made: 1. +VS to V+ test point 2. V+OPA to OAV+ test point 3. GND to V- and OAV- test points 4. VREF to OAVIN+ test point 5. Ensure that R5 is not populated 6. Populate R3 with a 0- resistor 7. Populate C4, C5, C11, and C12 with appropriate bypass capacitors for buffer amplifier 8. Differential input signal to V-IN and V+IN test points 9. Observe output at VO test point Note that C9 and C10 are prepopulated with 0.1-F power-supply decoupling capacitors. It is not required to remove C9 for proper single-supply operation. Refer to the device data sheet for additional powersupply decoupling information. SBOU122 - September 2013 Submit Documentation Feedback Universal Instrumentation Amplifier Evaluation Module Copyright (c) 2013, Texas Instruments Incorporated 9 Bill of Materials 6 www.ti.com Bill of Materials Table 2 provides the parts list for the EVM. Table 2. Universal IA EVM Bill of Materials Count 7 RefDes Value 0 Description Part Number R1, R2, RO 2 C9, C10 Ceramic bypass capacitors, 50 V, X7R, 20%, 1206 12065C104MAT2A AVX Corporation 8 N/A N/A Bumpon, cylindrical, 0.375 X 0.135, Black SJ61A8 3M 44 Various N/A Surface Mount Test Points 5015 Keystone Electronics 0.1 F Resistor, 1/4W, 1206 RMCF1206ZT0R00 Manufacturer 3 Stackpole Electronics Related Documentation from Texas Instruments The following documents provide information regarding Texas Instruments' integrated circuits and support tools for the EVM. This user's guide is available from the TI web site under literature number SBOU122. 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. Related Documentation 10 Document Literature Number INA118 Product Data Sheet SBOS027 INA121 Product Data Sheet SBOS078 INA122 Product Data Sheet SBOS069 INA126 Product Data Sheet SBOS062 INA128 Product Data Sheet SBOS051 INA129 Product Data Sheet SBOS051 INA141 Product Data Sheet SBOS052 INA155 Product Data Sheet SBOS114 INA156 Product Data Sheet SBOS119 INA333 Product Data Sheet SBOS445 OPA376 Product Data Sheet SBOS406 OPA277 Product Data Sheet SBOS079 OPA330 Product Data Sheet SBOS432 OPA378 Product Data Sheet SBOS417 REF3225 Product Data Sheet SBVS058 Universal Instrumentation Amplifier Evaluation Module Copyright (c) 2013, Texas Instruments Incorporated SBOU122 - September 2013 Submit Documentation Feedback 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. Should this evaluation board/kit not meet the specifications indicated in the User's Guide, the board/kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING LIMITED WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. Please read the User's Guide and, specifically, the Warnings and Restrictions notice in the User's Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For additional information on TI's environmental and/or safety programs, please visit www.ti.com/esh or contact TI. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. REGULATORY COMPLIANCE INFORMATION As noted in the EVM User's Guide and/or EVM itself, this EVM and/or accompanying hardware may or may not be subject to the Federal Communications Commission (FCC) and Industry Canada (IC) rules. For EVMs not subject to the above rules, this evaluation board/kit/module 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. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or ICES-003 rules, which are designed to provide reasonable protection against radio frequency interference. Operation of the equipment may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. General Statement for EVMs including a radio User Power/Frequency Use Obligations: This radio is intended for development/professional use only in legally allocated frequency and power limits. Any use of radio frequencies and/or power availability of this EVM and its development application(s) must comply with local laws governing radio spectrum allocation and power limits for this evaluation module. It is the user's sole responsibility to only operate this radio in legally acceptable frequency space and within legally mandated power limitations. 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. For EVMs annotated as FCC - FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant Caution This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. FCC Interference Statement for Class A EVM devices This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. 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. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: * Reorient or relocate the receiving antenna. * Increase the separation between the equipment and receiver. * Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. * Consult the dealer or an experienced radio/TV technician for help. For EVMs annotated as IC - INDUSTRY CANADA Compliant This Class A or B digital apparatus complies with Canadian ICES-003. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Concerning EVMs including radio transmitters This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Concerning EVMs including detachable antennas Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device. Cet appareil numerique de la classe A ou B est conforme a la norme NMB-003 du Canada. Les changements ou les modifications pas expressement approuves par la partie responsable de la conformite ont pu vider l'autorite de l'utilisateur pour actionner l'equipement. Concernant les EVMs avec appareils radio Le present appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisee aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioelectrique subi, meme si le brouillage est susceptible d'en compromettre le fonctionnement. Concernant les EVMs avec antennes detachables Conformement a la reglementation d'Industrie Canada, le present emetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inferieur) approuve pour l'emetteur par Industrie Canada. Dans le but de reduire les risques de brouillage radioelectrique a l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnee equivalente (p.i.r.e.) ne depasse pas l'intensite necessaire a l'etablissement d'une communication satisfaisante. Le present emetteur radio a ete approuve par Industrie Canada pour fonctionner avec les types d'antenne enumeres dans le manuel d'usage et ayant un gain admissible maximal et l'impedance requise pour chaque type d'antenne. Les types d'antenne non inclus dans cette liste, ou dont le gain est superieur au gain maximal indique, sont strictement interdits pour l'exploitation de l'emetteur. SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER Important Notice for Users of EVMs for RF Products 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 1.1 of Article 6 of the Ministry's Rule for Enforcement of Radio Law of Japan, Use this product only after you obtained the license of Test Radio Station as provided in Radio Law of Japan with respect to this product, or Use of this product only after you obtained the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect to this product. 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 1. 2. 3. 61118328173 http://www.tij.co.jp SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER 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. It is intended solely for use for preliminary feasibility evaluation in laboratory/development environments by technically qualified electronics experts who are familiar with the dangers and application risks associated with handling electrical mechanical components, systems and subsystems. It should not be used as all or part of a finished end product. Your Sole Responsibility and Risk. You acknowledge, represent and agree that: 1. 2. 3. 4. You have unique knowledge concerning Federal, State and local regulatory requirements (including but not limited to Food and Drug Administration regulations, if applicable) which relate to your products and which relate to your use (and/or that of your employees, affiliates, contractors or designees) of the EVM for evaluation, testing and other purposes. You have full and exclusive responsibility to assure the safety and compliance of your products with all such laws and other applicable regulatory requirements, and also to assure the safety of any activities to be conducted by you and/or your employees, affiliates, contractors or designees, using the EVM. Further, you are responsible to assure that 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. Since the EVM is not a completed product, it may not meet all applicable regulatory and safety compliance standards (such as UL, CSA, VDE, CE, RoHS and WEEE) which may normally be associated with similar items. You assume full responsibility to determine and/or assure compliance with any such standards and related certifications as may be applicable. You will employ reasonable safeguards to ensure that your use of the EVM will not result in any property damage, injury or death, even if the EVM should fail to perform as described or expected. You will take care of proper disposal and recycling of the EVM's electronic components and packing materials. Certain Instructions. It is important to operate this EVM within TI's recommended specifications and environmental considerations per the user guidelines. Exceeding the specified EVM ratings (including but not limited to input and output voltage, current, power, and environmental ranges) may cause property damage, personal injury or death. If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and intended loads. Any loads applied outside of the specified output range may result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or interface electronics. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than 60C as long as the input and output are maintained at a normal ambient operating temperature. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors which can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during normal operation, please be aware that these devices may be very warm to the touch. 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