SBOU302A June   2023  – December 2023 INA740A , INA740B , INA745A , INA745B , INA780A , INA780B

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Quick Start Setup
    2. 2.2 EVM Operation
      1. 2.2.1 Current Sensing Operation
        1. 2.2.1.1 Detailed Setup
    3. 2.3 Circuitry
      1. 2.3.1 Current Sensing IC
      2. 2.3.2 Input Signal Path
      3. 2.3.3 Digital Circuitry
        1. 2.3.3.1 I2C
    4.     General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  7. 3Software
    1. 3.1 Setup
      1. 3.1.1 Driver Installation
      2. 3.1.2 Firmware
        1. 3.1.2.1 Firmware Debug
      3. 3.1.3 GUI Setup and Connection
        1. 3.1.3.1 Initial Setup
        2. 3.1.3.2 GUI to EVM Connection
    2. 3.2 GUI Operation
      1. 3.2.1 Homepage Tab
      2. 3.2.2 Registers Tab
      3. 3.2.3 Results Data Tab
    3. 3.3 Direct EVM USB Communication
      1. 3.3.1 Standard USB Read and Write Operations
      2. 3.3.2 Collect Data Through the USB BULK Channel
  8. 4Hardware Design Files
    1. 4.1 Schematics
      1. 4.1.1 SENS108 (INA740AEVM, INA740BEVM, INA741EVM)
      2. 4.1.2 SENS109 (INA745AEVM, INA745BEVM, INA746EVM)
      3. 4.1.3 SENS119 (INA780AEVM, INA780BEVM, INA781EVM)
    2. 4.2 PCB Layout
      1. 4.2.1 SENS108 (INA740AEVM, INA740BEVM, INA741EVM)
      2. 4.2.2 SENS109 (INA745AEVM, INA745BEVM, INA746EVM)
      3. 4.2.3 SENS119 (INA780AEVM, INA780BEVM, INA781EVM)
    3. 4.3 Bill of Materials
      1. 4.3.1 SENS108 (INA740-INA741EVM), SENS109 (INA745-INA746EVM), SENS119 (INA780-INA781EVM)
  9. 5Additional Information
    1. 5.1 Trademarks
  10. 6Related Documentation
  11. 7Revision History

1.1 Introduction

This user’s guide describes the characteristics, operation, and use of the EZShunt™ digital power monitor EVMs (evaluation modules), specifically EVMs for the INA740, INA741, INA745, INA746, INA780, and INA781. Throughout this document, the terms evaluation board, evaluation module and EVM are synonymous with the INA740AEVM, INA740BEVM, INA741EVM, INA745AEVM, INA745BEVM, INA746EVM, INA780AEVM, INA780BEVM, and INA781EVM. This document includes a schematic, reference printed-circuit board (PCB) layouts, and a complete bill of materials (BOM).

The EZShunt digital power monitors integrate 20-bit (INA741, INA746, and INA781) and 16-bit (INA740, INA745, and INA780) delta-sigma ADCs that measure an internal current sensing element capable of varying continuous current at common-mode voltages, as high as +85 V, that are independent of the supply. These devices can automatically calculate and report current, bus voltage, die temperature, power, energy, and charge accumulation. These devices also have built-in diagnostic capabilities to indicate system health accessible through a digital output pin, ALERT. These devices operate from a single supply of 2.7 V to 5.5 V, drawing less than 1 mA of current during operation over temperature, and < 5-µA current during shutdown. Users can interface the output with a multitude of microcontrollers (MCUs) in a standard I2C interface.

WARNING: NOTICE: The INA740BEVM (SENS108A-002) does not currently ship with INA740B populated. To evaluate INA740B, order functionally equivalent INA740AEVM (SENS108E1-001) or functionally similar INA741EVM (SENS108E1-003) or solder INA740B onto the INA740BEVM.