Texas Instruments INA193EVM User Manual

User's Guide

SBOU147–August 2015

INA193EVM User's Guide

This user’s guide describes the characteristics, operation, and use of the INA193EVM evaluation module. It discusses how to set up and configure the hardware, and reviews various aspects of the hardware operation. Throughout this document, the terms evaluation board, evaluation module, and EVM are synonymous with the INA193EVM. This document also includes an electrical schematic, printed circuit board (PCB) layout drawings, and a parts list for the EVM.

Contents

1 Overview ..................................................................................................................... 2

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

3 Hardware...................................................................................................................... 3

4 Schematic, PCB Layout, and Bill of Materials ........................................................................... 5

List of Figures

1 INA193 Test Board Block Diagram........................................................................................ 4

2 INA193 Test-Board Schematic............................................................................................. 5

3 PCB Component Placement ............................................................................................... 6

4 PCB Top Layer............................................................................................................... 6

5 PCB Bottom Layer........................................................................................................... 6

List of Tables

1 INA193EVM Kit Contents................................................................................................... 2

2 Related Documentation..................................................................................................... 2

3 INA193 Test Board Parts List ............................................................................................. 7

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Overview

1 Overview

The INA193 is a current-shunt monitor with voltage output. The INA193EVM consists of one PCB. The EVM consists of the INA193 device, screw-terminals, and test points for external hardware connections.

1.1 Kit Contents

Table 1 summarizes the contents of the INA193EVM kit. Contact the Texas Instruments Product Information Center nearest you if any component is missing. Also, check the INA193 product folder on the

TI web site at www.ti.com for any further information regarding this product.

Table 1. INA193EVM Kit Contents

Item Quantity

INA193 test board 1

1.2 Related Documentation from Texas Instruments

The following document provides information regarding Texas Instruments' integrated circuits used in the assembly of the INA193EVM. This user's guide is available from the TI web site under literature number SBOU147. 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.

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INA19x product data sheet SBOS307

2 Quick Start Setup and Use

Follow these steps to set up and use the INA193EVM:

1. Connect an external dc supply voltage (between 2.7 V and 18 V) to the V+ pin referenced to the GND pin of the J1 terminal block.

2. Connect the desired input to the J2 terminal block. This desired input is either a external shunt resistor or a differential voltage source with a common-mode voltage of –16 V to +80 V referenced to the GND pin.

Table 2. Related Documentation

Document Literature Number

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3 Hardware

The INA193EVM provides basic functional evaluation of the INA193. The fixture layout is not intended to be a model for the target circuit, and is not laid out for electromagnetic compatibility (EMC) testing.

The layout of the INA193EVM PCB provides the following features:

• Ease of access to all device pins

• Multiple input signal options

• Optional surface-mount shunt

• Optional input filter

• Evaluate with and without a shunt resistor: – The INA193EVM measures differential voltage both with and without a shunt resistor. Connect both

sides of an external shunt resistor to measure current, or omit the shunt resistor and apply a differential voltage directly to the device input.

• INA19x family compatibility: – INA193 can be desoldered and replaced with the INA194 or INA195 to evaluate other gains

available in this product family.

– INA196, INA197, and INA198 are the same devices in the same package, but with different pinouts.

The corresponding gains of the INA193 (20 V/V), INA194 (50 V/V), and INA195 (100 V/V) serve as evaluation modules for those products as well.

Refer to the INA19x product data sheet for comprehensive information about this family of current-shunt monitor devices.

Hardware

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OUT

GND

INA193

VIN+

V+

VIN±

Supply

Voltage

VBus

Load

Output

Voltage

SHUNT

Hardware

3.1 Theory of Operation

A block diagram of the INA193 test-board hardware is shown in Figure 1.The INA193 test board contains three, 2-pin headers, giving access to all five pins of the INA193 for evaluation. Minimal support circuitry is included on the PCB. Support circuitry can be removed or bypassed if necessary.

The INA193EVM requires a 2.7-V to 18-V power supply. Connect the VIN+ and VIN– pins across an external shunt resistor, in series with a –16-V to +80-V supply, to find the current flowing through that resistor. Optionally, populate R1 as the shunt resistor and connect in series with a load supply. This shunt resistor has a 2512 footprint, and the traces on the EVM are only able to support up to 1.5 A at room temperature. Shunt resistors with applied current must have an appropriate power rating. Use a voltmeter on the OUT pin to measure the voltage output of the measurement. Optionally, use R2, R3, and C1 as an input filter.

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Figure 1. INA193 Test Board Block Diagram

Choose a shunt resistor with an acceptable power rating and limit the current to

1.5 A or less; otherwise, damage to the EVM may result.

3.2 Voltage Inputs (VIN+ and VIN– Pins)

To evaluate the INA193, connect the VIN+ and VIN– pins at J2 to an external shunt resistor to produce a differential voltage, or directly to a differential voltage source. The INA193 multiplies the differential voltage by the device gain (20 V/V). The full-scale, sense-input voltage (V has a maximum input as shown in Equation 1:

Maximum V

where

• V+ is the supply voltage

• Gain = 20 V/V (for INA193) (1)

The INA19x devices are specified for use with a V (VIN–). If the intended application requires gain error ≤ ±1.4% with common-mode voltages up to 80 V and V

≤ 20 mV, consider the INA282 (50 V/V) and the INA286 (100 V/V) with the INA282-286EVM.

SENSE

= [(V+) – 0.2] / Gain

SENSE

CAUTION

greater than 20 mV, where V

SENSE

) is defined as (VIN+) – (VIN–), and

SENSE

= (VIN+) –

SENSE

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4 Schematic, PCB Layout, and Bill of Materials

4.1 Schematic

Figure 2 shows the complete schematic of the INA193 test board. R1 is an optional shunt resistor. R2, R3,

and C1 form the optional input filter. Terminal block J1 allows access to the V+ and GND pins. Terminal block J2 allows access to the VIN+ and VIN– pins. Terminal block J3 provides two screw terminals connected to the OUT and GND pins.

Figure 2. INA193 Test-Board Schematic

Schematic, PCB Layout, and Bill of Materials

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Schematic, PCB Layout, and Bill of Materials

4.2 PCB Layout

Figure 3 shows the component placement on the top layer of the test board. There are no components on

the bottom layer. Figure 4 and Figure 5 show the top and bottom layers, respectively, of the test board.

Figure 3. PCB Component Placement

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INA193EVM User's Guide SBOU147–August 2015

Figure 4. PCB Top Layer

Figure 5. PCB Bottom Layer

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Schematic, PCB Layout, and Bill of Materials

4.3 Bill of Materials

Table 3 lists the bill of materials for the INA193 test board.

Table 3. INA193 Test Board Parts List

Quantity RefDes Description Part Number Manufacturer

2 GND1, GND2 Test Point, Miniature, Black, TH 5001 Keystone 3 OUT, VIN+, VIN- Test Point, Miniature, Yellow, TH 5004 Keystone 1 V+1 Test Point, Miniature, Red, TH 5000 Keystone 0 C1 CAP, CERM, 0.1uF, 100V, +/-20%, X7R, 1206 (Unpopulated) 12061C104MAT2A AVX Corporation 4 H9, H10, H11, H12 Bumpon, Cylindrical, 0.312 X 0.200, Black SJ61A1 3M 3 J1, J2, J3 Terminal Block, 6A, 3.5mm Pitch, 2-Pos, TH ED555/2DS On Shore

0 R1 RES, 0.01 ohm, 1%, 3W, 2512 (Unpopulated) CRA2512-FZ-R010ELF Bourns 2 R2, R3 RES, 0 ohm, 5%, 0.25W, 1206 CRCW12060000Z0EA Vishay-Dale 1 U1 Current-Shunt Monitor -16V to +80V Common Mode Range, INA193AIDBV Texas Instruments

DBV0005A

Technology

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Texas Instruments INA193EVM User Manual

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