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User's Guide

SBOU085–May 2010

INA199A1-A3EVM

This user’s guide describes the characteristics, operation, and use of the INA199A1-A3 evaluation module

(EVM). This EVM is designed to evaluate the performance of the INA199A1, INA199A2, and INA199A3

voltage output current shunt monitors in a variety of configurations. The EVM layout and design are

flexible enough to allow evaluation of a wide range of applications. This document also includes a

schematic, reference printed circuit board (PCB) layouts, and a complete bill of materials.

Contents

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

2 Quick Start Setup and Use ................................................................................................ 4

3 INA199A1-A3EVM Circuit .................................................................................................. 6

4 Reference Voltage Setup ................................................................................................. 11

5 INA199A1-A3EVM Schematic and PCB Layout ....................................................................... 12

6 Bill of Materials ............................................................................................................. 14

List of Figures

1 Hardware Included with the INA199A1-A3EVM ........................................................................ 3

2 Measurement with Shunt .................................................................................................. 4

3 Measurement without Shunt............................................................................................... 5

4 TO-247 Package In R1..................................................................................................... 6

5 CS3 Package in R1......................................................................................................... 6

6 TO-126 Package in R1..................................................................................................... 6

7 TO-220 Package in R1..................................................................................................... 6

8 Radial Package in R2 ...................................................................................................... 8

9 U1 Footprint ................................................................................................................ 10

10 U1 Populated with DIP Board............................................................................................ 10

11 INA199A1-A3EVM Schematic ........................................................................................... 12

12 INA199A1-A3EVM PCB .................................................................................................. 13

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SBOU085–May 2010 INA199A1-A3EVM

Summary of content (16 pages)

PAGE 1
User's Guide SBOU085 – May 2010 INA199A1-A3EVM This user’s guide describes the characteristics, operation, and use of the INA199A1-A3 evaluation module (EVM). This EVM is designed to evaluate the performance of the INA199A1, INA199A2, and INA199A3 voltage output current shunt monitors in a variety of configurations. The EVM layout and design are flexible enough to allow evaluation of a wide range of applications.
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Introduction and Overview www.ti.com 1 Introduction and Overview 1.1 INA199A1-A3 The INA199A1-A3 devices are voltage output, high-side measurement, bi-directional, zero-drift current shunt monitors. This family of devices has gains that range from 50V/V to 200V/V. The voltage developed across the device inputs is amplified by the corresponding gain of the specific device and is presented at the output pin. These devices can sense voltage drops across shunts at common-mode voltages from –0.
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Introduction and Overview www.ti.com 1.3 Hardware Included The initial release of this evaluation board and user's guide may precede the actual release of some members of the INA199A1-A3 device family. As additional devices with the family are released, the INA199A1-A3EVM evaluation board will be associated with them. A test fixture populated with an INA199A1 is provided in all INA199A1-A3EVMs delivered, as Figure 1 shows. Figure 1.
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Quick Start Setup and Use 2 www.ti.com Quick Start Setup and Use Follow these procedures to set up and use the INA199A1-A3EVM. Step 1. Insert the device board to be evaluated into the U1 location. The U1 location allows the user to either evaluate one of the provided device boards or install the test device directly on the surface-mount pads in the U1 footprint. Step 2. Connect an external dc supply voltage between 2.7V and 26V to the V+ terminal referenced to the GND terminal of T3.
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Quick Start Setup and Use www.ti.com 2.2 Measurement without Shunt This connection method allows the user to either simulate the voltage developed across a sense resistor based on a given set of system conditions, or to connect the INA199A1-A3EVM remotely to an existing shunt already included in an example application. Figure 3 illustrates a measurement configuration without a shunt. To configure a measurement evaluation without a shunt, follow these procedures. 1.
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INA199A1-A3EVM Circuit 3 www.ti.com INA199A1-A3EVM Circuit This section summarizes the INA199A1-A3EVM components. 3.1 R1 R1 can be used for shunt resistors that have a package that may not be easily adaptable to a standard, two-terminal, through-hole footprint or to a 0603 through 1206 surface-mount footprint. Specifically, this component location was added to allow the use of TO-126, TO-220, TO-247, and four terminal inline radial packages such as the CS3 series of shunts from Ohmite.
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INA199A1-A3EVM Circuit www.ti.com Figure 6. TO-126 Package in R1 Figure 7.
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INA199A1-A3EVM Circuit 3.2 www.ti.com R2 R2 is intended to handle two- and four-terminal radial packages (as Figure 8 shows) as well as surface-mount packages that range in size from 0603 to 1206. Figure 8.
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INA199A1-A3EVM Circuit www.ti.com 3.3 R3, R4, C1 R3 and R4 are factory-installed 0Ω resistors. These resistors, in combination with C1, form an input filter. These locations allow for both through-hole and surface-mount packages that range in size from 0603 to 1206. Additional information regarding the use of input filtering is provided in the INA199A1-A3 product data sheet. 3.4 Bypass Capacitors and Jumpers C2 and C3 are 0.1mF supply bypass capacitors.
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INA199A1-A3EVM Circuit www.ti.com In addition to being able to accommodate the device boards, a surface-mount footprint is also included so the user can install one of these devices directly onto the board, if desired.Figure 9 illustrates the U1 footprint on the EVM. Figure 10 shows the U1 slot populated with a DIP board device. Figure 9. U1 Footprint 10 Figure 10.
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Reference Voltage Setup www.ti.com 3.6 Voltage Inputs The VIN+ and VIN– terminals of T2 are intended to be used if the designer is configuring the EVM for measurement without an onboard shunt resistor (see Figure 3). These inputs accept a differential voltage that is amplified by the selected device gain and is presented at the VOUT terminal of T2. These inputs could also be used to connect the differential voltage developed across an external shunt in an existing circuit.
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INA199A1-A3EVM Schematic and PCB Layout 5 www.ti.com INA199A1-A3EVM Schematic and PCB Layout 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 INA199A1-A3EVM PCBs. 5.1 Schematic Figure 11 shows the schematic for the INA199A1-A3EVM PCB. J2 T1 10 9 8 7 6 5 4 3 2 1 Vin Load REF V+ GND 2 1 T2 Vin+ Vin - Vout U1 Vin + Vin - J1 R1 V+ 5 R3 6 R2 0 NC NC VIN+ V+ 4 7 VIN- GND 3 C2 2 0.
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INA199A1-A3EVM Schematic and PCB Layout www.ti.com 5.2 PCB Layout Figure 12 illustrates the PCB layout for the INA199A1-A3EVM. Figure 12.
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Bill of Materials 6 www.ti.com Bill of Materials Table 2 provides the parts list for the INA199A1-A3EVM. Table 2. Bill of Materials Count Value Description R1 N/A TO-126, TO-220, TO-247, C53 Optional/Not Installed R2 N/A Resistor, 0603-1206/Through-hole R3, R4 0Ω Resistor, 0Ω, 1/8W 5%, 0603-1206/Through-hole C1 N/A Capacitor, 0603-1206/Through-hole 2 Optional/Not Installed 14 RefDes Optional/Not Installed Part Number MFR ERJ-6GEY0R00V Panasonic - ECG Capacitor, 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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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.