Boardoza INA228 Current and Power Monitor Breakout Board
High-Precision Power Measurement with B-INA228-BRK
The B-INA228-BRK breakout board features Texas Instruments’ industry-leading INA228 power monitor . With its onboard 15 mΩ shunt resistor, it measures 20-bit resolution and less than: ±0.05% error, while the VBUS pin allows direct voltage monitoring from 0 V to 85 V. The high-speed I²C interface (SCL/SDA), programmable ALERT output, and integrated triangular time filter make it easy to detect sudden load changes and protect your system.
Equipped with a standard 5-pin header (VCC, GND, SDA, SCL, ALERT) and built-in pull-up resistors, the module integrates into microcontroller projects in minutes. From industrial power supplies and battery management systems to IoT nodes and power efficiency analyzers, the B-INA228-BRK provides reliable data in both prototyping and mass production. Its compact layout and high-quality passive components ensure excellent noise immunity and stable performance in any environment.
Additional Notes:
- A0 and A1 default to LOW through the R6 and R7 pull-down resistors. Close the corresponding A0 or A1 solder jumper to connect that address input to VCC; select each bit independently.
- The VBUS1 solder jumper is open by default. Close it to connect the VBUS sense input to VIN+ for simultaneous current and high-side bus-voltage measurement. The VBUS input may also be accessed through the labelled VBUS terminal.
Key Features
- Onboard 15 mΩ shunt resistor for high accuracy (\<: ±0.05% error)
- Current Measurement Range: ±10 A (default configuration) ±2.5 A (selectable via ADCRANGE register for higher resolution)
- High-speed I²C interface with programmable ALERT output
- Selectable I²C address: A0/A1 default LOW via R6/R7; close each corresponding solder jumper to select VCC
- VBUS1 solder jumper is open by default; close it to connect VBUS to VIN+ for high-side bus-voltage measurement
- Fast alert response: 75 μs
- Bus voltage sense input: 0 V to 85 V
- Input bias current: 2.5 nA (maximum)
- 2.94-MHz high-speed I2C interface with 4 selectable addresses
- High-resolution, 20-bit delta-sigma ADC
Technical Specifications
- Item
- B-INA228-BRK
- Functions
- Current sense and Power Measurement
- Input Voltage (VCC)
- 2.7 V to 5.5 V
- Bus voltage input range (VBUS)
- 0 V to 85 V
- Current Measurement Range
- ±10 A (default configuration) ±2.5 A (selectable via ADCRANGE register)
- Operating Temperature
- -40/+125 °C
- Board Dimensions
- 20x20mm
Support
For technical questions, documentation and issue reports, use the GitHub repository or write to us directly.