National Semiconductor INA260 Manual de usuario

INA260EVM-PDK

INA260 Evaluation Module and Product Demonstration Kit

User's Guide

Literature Number: SBOU180

November 2016

2SBOU180–November 2016

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Table of Contents

Contents

1 Overview............................................................................................................................. 5

1.1 INA260EVM-PDK Contents............................................................................................. 6

1.2 INA260EVM-PDK Features............................................................................................. 7

1.3 Related Documentation from Texas Instruments .................................................................... 8

2 INA260EVM-PDK Hardware.................................................................................................... 8

2.1 SM-USB-DIG Platform Description .................................................................................... 9

2.2 INA260EVM PCB Description......................................................................................... 10

2.3 EVM Digital Inputs and Outputs ...................................................................................... 12

3 INA260EVM-PDK Setup ....................................................................................................... 12

3.1 One-Time GUI Software Installation ................................................................................. 13

3.2 INA260EVM Jumper Settings......................................................................................... 15

3.3 Connecting the Hardware ............................................................................................. 16

3.4 System Power-Up ...................................................................................................... 18

4 INA260EVM GUI Software ................................................................................................... 19

4.1 Configuration Tool ..................................................................................................... 20

4.2 Results Bar .............................................................................................................. 23

4.3 Graph Tool............................................................................................................... 23

4.4 Registers Tool........................................................................................................... 24

5 INA260EVM Documentation................................................................................................. 24

5.1 Schematic................................................................................................................ 25

5.2 PCB Layout.............................................................................................................. 26

5.3 Bill of Materials.......................................................................................................... 27

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SBOU180–November 2016

List of Figures

1 Hardware Included with the INA260EVM Kit............................................................................. 6

2 Placeholders for TVS Devices ............................................................................................. 7

3 INA260EVM-PDK Hardware Setup........................................................................................ 8

4 SM-USB-DIG Platform Block Diagram.................................................................................... 9

5 INA260EVM Block Diagram............................................................................................... 10

6 Recommended Display Settings ......................................................................................... 13

7 INA260EVM GUI Installation.............................................................................................. 14

8 INA260EVM Default Jumper Settings ................................................................................... 15

9 INA260EVM and SM-USB-DIG Connected in Proper Orientation................................................... 16

10 SM-USB-DIG Powers on When Connected to a Computer .......................................................... 17

11 INA260EVM Powers Up following the GUI Launch.................................................................... 18

12 VDUT Selection............................................................................................................... 19

13 Configuration Page......................................................................................................... 20

14 Slave Address Setting ..................................................................................................... 21

15 Operating Mode Menu..................................................................................................... 21

16 Configuring Conversion Times ........................................................................................... 22

17 Configuring the Alert Pin .................................................................................................. 22

18 INA260 Results Bar........................................................................................................ 23

19 Graph Tool Page ........................................................................................................... 23

20 Registers Tool Page ....................................................................................................... 24

21 INA260EVM Schematic.................................................................................................... 25

22 INA260EVM PCB Top Layer (Component Side)....................................................................... 26

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List of Tables

1 INA260EVM Kit Contents................................................................................................... 6

2 Related Documentation..................................................................................................... 8

3 Signal Definition of J4 on INA260EVM Board.......................................................................... 10

4 INA260 I2C Address Configuration....................................................................................... 12

5 INA260EVM Test Board Jumper Functions............................................................................. 16

6 Bill of Materials: INA260EVM ............................................................................................ 27

SBOU180–November 2016

INA260EVM-PDK and Software Tutorial

Windows is a registered trademark of Microsoft, Corp.

I2C is a trademark of NXP Semiconductors.

All other trademarks are the property of their respective owners.

User's Guide

SBOU180–November 2016

INA260EVM-PDK and Software Tutorial

This user's guide describes the characteristics, operation, and use of the INA260EVM-PDK. This user's

guide discusses how to set up and configure the software and hardware, and reviews various aspects of

device operation. Throughout this document, the terms evaluation board,evaluation module,EVM PCB,

and EVM are synonymous with the INA260EVM PCB. The terms PDK,kit, and EVM kit are synonymous

with the INA260EVM-PDK. This user's guide also includes information regarding operating procedures

and input/output connections, an electrical schematic, printed circuit board (PCB) layout drawings, and a

parts list for the EVM.

1 Overview

The INA260 is a high- or low-side current sensor, power, and voltage monitor with a 2-mΩprecision

integrated shunt resistor and I2C™ interface. The INA260 offers programmable conversion times and

averaging modes, enabling high resolution measurements of the current, voltage, and power dissipation of

the source being monitored. The INA260EVM-PDK, which consists of the INA260EVM and SM-USB-DIG

controller board, is a platform for evaluating the features and performance of the INA260 under various

signal and supply conditions. This document gives a general overview of the INA260EVM-PDK, and

describes the features and functions to be considered when using it.

Overview

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INA260EVM-PDK and Software Tutorial

1.1 INA260EVM-PDK Contents

Table 1 summarizes the contents of the INA260EVM kit. Figure 1 shows all included hardware. Contact

the Texas Instruments Product Information Center nearest you if any component is missing.

NOTE: This EVM kit requires the INA260EVM GUI software, which is available for download through

the INA260 Tools & Software folder. Downloading the latest version of the GUI software is

recommended.

Table 1. INA260EVM Kit Contents

Item Quantity

INA260EVM PCB test board 1

SM-USB-DIG platform PCB 1

USB extender cable 1

Figure 1. Hardware Included with the INA260EVM Kit

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Overview

SBOU180–November 2016

INA260EVM-PDK and Software Tutorial

1.2 INA260EVM-PDK Features

• USB-powered; no external power supply is required

• Support for full ±15-A input current range and 36-V common-mode voltage range of the INA260

• EVM includes placeholders for transient voltage suppression (TVS) devices to protect the INA260

inputs from excessively high common-mode voltages

• Digital host controller included

• Intuitive GUI software supports all major INA260 functional modes and simplifies device configuration

NOTE: To protect against voltage transients that may exceed the absolute maximum ratings, TI

highly recommends installing the TVS devices (D3 and D4, as shown in Figure 2) with a

minimum power rating of 1000 W to clamp the input voltages to less than 36 V.

Figure 2. Placeholders for TVS Devices

INA260EVM

PCB

POWER

GND

VSUPPLY ALERT

SDA

SCL

SM-USB-DIG

Controller

ILOAD

LOAD

GND

POWER

USB DATA

VBUS

11.1 A

6.02 V

66.82 W

ILOAD

VBUS

PLOAD

INA260EVM GUI

Overview

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1.3 Related Documentation from Texas Instruments

The following documents provide information regarding Texas Instruments' integrated circuits used in the

assembly of the INA260EVM. This user's guide is available from the TI web site under literature number

SBOU180. 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.

Table 2. Related Documentation

Document Literature Number

INA260 product data sheet SBOS656

SM-USB-DIG platform user guide SBOU098

2 INA260EVM-PDK Hardware

Figure 3 shows the overall system setup for the INA260EVM-PDK. The power source to be monitored is

connected to the EVM input terminals. The computer runs the GUI software through which the user can

enable power to the INA260 and communicate with the device. User commands are sent through the

computer's USB port to the SM-USB-DIG board that translates these commands into I2C format, before

sending them to the EVM. With power enabled, the INA260 responds to these I2C commands by sending

the requested data back to the SM-USB-DIG board over the I2C. The SM-USB-DIG converts the received

data to USB format and sends the data back to the computer, where it is then appropriately processed

and displayed to the user.

Figure 3. INA260EVM-PDK Hardware Setup

TUSB3210

8052 Cm

with USB Interface

and UART

8Kx8-byte

EEPROM

+3.3V

VUSB

+5V

Power-On Reset SM USB DIG Platform

To Test Board

To Computer and Power Supplies

Power

Switching

Switched

Power

USB Bus

from

Computer

USB Power

+5.0V

+3.0V

(H-Z, 3.3V, or 5V)

DUT

Buffers and

Level Translators

I C/SPI

Control and

Measure Bits

+3.3V

Regulator

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INA260EVM-PDK Hardware

SBOU180–November 2016

INA260EVM-PDK and Software Tutorial

2.1 SM-USB-DIG Platform Description

Figure 4 shows the block diagram for the SM-USB-DIG platform. This platform is a general-purpose data

acquisition system that is used on several different Texas Instruments' evaluation modules. The details of

operation are included in a separate document, SBOU098 (available for download at www.ti.com).

The primary control device on the SM-USB-DIG platform is the TUSB3210. The TUSB3210 is an 8052

microcontroller that converts data received on the built-in USB interface to the I2C, SPI, and other serial

digital I/O patterns. This EVM uses the I2C interface of the TUSB3210 to control the INA260.

Power supply for the SM-USB-DIG is derived from the USB interface. The SM-USB-DIG includes an

onboard low dropout (LDO) regulator that uses the 5-V USB supply from the computer to generate a 3.3-V

supply, which is then used to power all the active circuitry on board. The 3.3-V regulated supply can also

be used to power the EVM PCB. In fact, the raw 5-V USB supply as well as the 3.3-V regulated supply are

routed to a 2-input power MUX on the SM-USB-DIG, the TPS2115A, whose output terminates at the VDUT

pin of the 10-pin EVM connector, intended to be used as the EVM power supply. The user can select

between the 5-V and 3.3-V options for VDUT through the INA260EVM GUI software.

Figure 4. SM-USB-DIG Platform Block Diagram

J1 J4

J2, J3

INA260

VDUT Supply

GND

A0, A1

I2C interface

VBUS

IN+

IN-

INA260EVM-PDK Hardware

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2.2 INA260EVM PCB Description

Figure 5 depicts a block diagram of the INA260EVM PCB highlighting the power supplies, analog inputs,

and digital I/O signals.

Figure 5. INA260EVM Block Diagram

The EVM PCB requires minimal instrumentation to be operated. In fact, the only pieces of required

equipment not included in the kit are a (Windows®7) computer and an input current source. All other

inputs are supplied by the SM-USB-DIG board, via the 10-pin connector socket, J4. Table 3 lists the

pinout for J4.

(1) When VDUT is Hi-Z, all digital I/Os are Hi-Z as well.

Table 3. Signal Definition of J4 on INA260EVM Board

Pin on J4 Signal Description

10 I2C_SCL I2C clock signal (SCL)

9 CTRL/MEAS4 GPIO: control output or measure input

8 I2C_SDA1 I2C data signal (SDA)

7 CTRL/MEAS5 GPIO: control output or measure input

6 SPI_DOUT1 SPI data output (MOSI)

5 VDUT Switchable DUT power supply: 3.3 V, 5 V, Hi-

Z (disconnected)(1)

4 SPI_CLK SPI clock signal (SCLK)

3 GND Power return (GND)

2 SPI_CS1 SPI chip-select signal (CS)

1 SPI_DIN1 SPI data input (MISO)

2.2.1 EVM Power Supply

The INA260EVM PCB uses the VDUT and GND lines from the SM-USB-DIG (via J4) as the high and low

supply voltages for the INA260. As noted in Table 3, the available supply voltages for VDUT are 5V and

3.3V. The EVM supply voltage is user-selectable through the GUI. The 1µF ceramic capacitor, C2, placed

in close proximity to the INA260 (U1) supply pin provides adequate decoupling to VDUT for power supply

rejection at higher frequencies.

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