INA226 – I2C Bi-Directional Voltage Current Power Alert Monitor Module

INA226 – I2C Bi-Directional Voltage Current Power Alert Monitor Module

The INA226 I2C Voltage, Current, and Power Monitor Module is a high-precision bi-directional sensor designed for accurate measurement and monitoring of electrical parameters in a wide range of applications. Based on Texas Instruments’ INA226 chip, this module provides 16-bit resolution and communicates via the I²C or SMBus interface, making it easy to integrate with popular microcontrollers such as Arduino, ESP32, and Raspberry Pi.

The INA226 module measures bus voltage, shunt voltage, current, and power with exceptional accuracy. Featuring a maximum offset voltage of only 10 µV and 0.1% gain error, it outperforms many industry-standard sensors. With programmable averaging, configurable conversion times, and alert functionality, this module delivers reliable performance for power supply systems, battery management, and energy monitoring applications.

Key Features

• High-Side or Low-Side Sensing: Flexible placement for current measurement.

• 16-bit Resolution: High precision measurement of voltage, current, and power.

• I²C/SMBus Interface: Simple connection and communication with most microcontrollers.

• Programmable Configuration: Adjustable averaging and conversion time for custom accuracy and response speed.

• Alert Output Function: Built-in alert pin for overcurrent, overvoltage, or user-defined limits.

• Wide Operating Range: Measures bus voltages from 0V to 36V and currents up to ±20A (depending on shunt resistor).

• Ultra-Low Offset & Gain Error: ±10 µV offset, ±0.1% gain error for high accuracy.

• Low Power Consumption: Typical operating current of only 330 µA.

Specifications

• Product Name: INA226 I2C Voltage, Current, and Power Monitor Module

• Operating Voltage: 3.3V – 5V DC

• Interface: I2C / SMBus

• Voltage Measurement Range: 0V – 36V

• Current Measurement Range: ±20A (with appropriate shunt resistor)

• Resolution: 16-bit

• Accuracy: ±1%

• Gain Error (Max): ±0.1%

• Offset Voltage (Max): ±10 µV

• Operating Temperature: -40°C to +125°C

• Typical Power Consumption: 330 µA

• Module Dimensions: 20mm × 21mm × 3mm

• Weight: 8g

Pin Description

• VCC: Power Supply (2.7V–5.5V)

• GND: Ground

• SDA: I2C Data Line

• SCL: I2C Clock Line

• ALE: Alert Pin (open-drain output)

• VBUS: Bus Voltage Measurement Input

• IN+: Connect to power source side of shunt

• IN-: Connect to load side of shunt

Applications

• Battery monitoring and charge/discharge analysis

• Power supply voltage and current measurement

• Energy consumption tracking

• Solar power performance evaluation

• Overload and fault detection in electrical systems

• IoT and embedded system power management

Package Includes

• 1 x INA226 – I2C Bi-Directional Voltage Current Power Alert Monitor Module

Note: Product images are for illustration purposes only and may differ slightly from the actual product.