SBOU113A June   2011  – January 2023

 

  1.   INA226EVM Rev A Model User's Guide and Software Tutorial
  2. 1Trademarks
  3. 2Overview
    1. 2.1 INA226EVM Kit Contents
    2. 2.2 Related Documentation from Texas Instruments
  4. 3INA226EVM Hardware Setup
    1. 3.1 Theory of Operation for INA226 Hardware
    2. 3.2 Signal Definitions of H1 (10-Pin Connector Socket)
      1. 3.2.1 Theory of Operation for SM-USB-DIG Platform
  5. 4INA226EVM Hardware
    1. 4.1 Electrostatic Discharge Warning
    2. 4.2 Connecting the Hardware
    3. 4.3 Connecting Power
    4. 4.4 Connecting the USB Cable to the SM-USB-DIG Platform
    5. 4.5 INA226EVM Default Jumper Settings
    6. 4.6 INA226EVM Features
      1. 4.6.1 J2: I2C VS Control Setting
      2. 4.6.2 J3/J4: I2C Address Hardware Setting (A0)
      3. 4.6.3 J5/J6: I2C Address Hardware Setting (A1)
      4. 4.6.4 External I2C Lines and Terminal Block T1
      5. 4.6.5 VIN+/VIN– Input Filter (R1, R2, and C1)
      6. 4.6.6 Shunt Monitor Configuration and Terminal Blocks T3 and T4
  6. 5INA226EVM Software Setup
    1. 5.1 Hardware Requirements
    2. 5.2 Software Installation
  7. 6INA226EVM Software Overview
    1. 6.1 Starting the INA226EVM Software
    2. 6.2 Configuring the INA226EVM Software
      1. 6.2.1 I2C Address Selection
      2. 6.2.2 Configure Operating Mode
      3. 6.2.3 Set Conversion Times
      4. 6.2.4 Set Configuration Register
      5. 6.2.5 Configuring the Alert Pin
    3. 6.3 Using the INA226EVM Software
      1. 6.3.1 INA226 Bus Voltage, Shunt Voltage, Current, and Power Reading Bar
      2. 6.3.2 Calculation and Theory of Operation
      3. 6.3.3 Register Tab
      4. 6.3.4 Graph Tab
      5. 6.3.5 Auto-Write and the Supply Voltage
  8. 7INA226EVM Documentation
    1. 7.1 Schematic
    2. 7.2 PCB Layout
    3. 7.3 Bill of Materials
  9. 8Revision History

3.2 Signal Definitions of H1 (10-Pin Connector Socket)

Table 3-1 lists the pinout for the 10-pin connector socket used to communicate between the INA226EVM and the SM-USB-DIG. It should be noted that the INA226EVM only uses the necessary I2C communication lines (pins 1 and 3) and the VDUT and GND pins (pin 6 and pin 8) to issue commands to the INA226 chip.

Table 3-1 Signal Definition of J1 on INA226EVM Board
PIN ON J1 SIGNAL DESCRIPTION
1 I2C_SCL I2C Clock Signal (SCL)
2 CTRL/MEAS4 GPIO: Control Output or Measure Input
3 I2C_SDA1 I2C Data Signal (SDA)
4 CTRL/MEAS5 GPIO: Control Output or Measure Input
5 SPI_DOUT1 SPI Data Output (MOSI)
6 VDUT Switchable DUT Power Supply: +3.3 V, +5 V, Hi-Z (Disconnected)(1)
7 SPI_CLK SPI Clock Signal (SCLK)
8 GND Power Return (GND)
9 SPI_CS1 SPI Chip Select Signal ( CS)
10 SPI_DIN1 SPI Data Input (MISO)
(1) When VDUT is Hi-Z, all digital I/O are Hi-Z as well.