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

6.2.1 I2C Address Selection

The INA226 device has a flexible I2C address configuration that allows for multiple devices to be on the same I2C lines. By moving the A0 and A1 addresses on jumpers J3-J6 to either GND, VS, SDA or SCL, the INA226 can be changed to a total of 16 I2C addresses as shown in Table 6-1.

Table 6-1 INA226 I2C Address Configuration
A1A0TARGET ADDRESS
GNDGND1000000
GNDVS+1000001
GNDSDA1000010
GNDSCL1000011
VS+GND1000100
VS+VS+1000101
VS+SDA1000110
VS+SCL1000111
SDAGND1001000
SDAVS+1001001
SDASDA1001010
SDASCL1001011
SCLGND1001100
SCLVS+1001101
SCLSDA1001110
SCLSCL1001111

Figure 6-3 shows how to configure the I2C addresses. Click either the A0 or A1 box and select how the hardware is configured on the EVM. Failure to select the correct address prevents the INA226 device from communicating with the software.

GUID-6CF8840B-1B18-40FC-AC82-9DFB3839FE65-low.pngFigure 6-3 Setting the I2C Address