Part Number: INA226AQDGSRQ1

Manufacturer: Texas Instruments

Description: IC CURRENT MONITOR 0.02% 10VSSOP

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of INA226AQDGSRQ1

Datasheet  INA226AQDGSRQ1 datasheet
Category Integrated Circuits (ICs)
Family PMIC – Current Regulation/Management
Manufacturer Texas Instruments
Series Automotive, AEC-Q100
Packaging Tape & Reel (TR)
Part Status Active
Function Current Monitor
Sensing Method High/Low-Side
Accuracy ±0.02%
Voltage – Input 0 V ~ 36 V
Current – Output 10mA
Operating Temperature -40°C ~ 125°C
Mounting Type Surface Mount
Package / Case 10-TFSOP, 10-MSOP (0.118″, 3.00mm Width)
Supplier Device Package 10-VSSOP

INA226AQDGSRQ1 Introduction

The INA226AQDGSRQ1 is a highly versatile and efficient current shunt and power monitor that offers precise measurements of current and power in a variety of applications. With its I2CTM- or SMBUS-compatible interface, programmable features, and wide operating range, the INA226AQDGSRQ1 is an excellent choice for engineers and developers seeking accurate and reliable current and power monitoring capabilities. This comprehensive guide will provide you with a detailed understanding of the INA226AQDGSRQ1, its key features, operation, and potential applications.

What is an INA226AQDGSRQ1?

The INA226AQDGSRQ1 is a highly advanced and versatile current shunt and power monitor. It is designed to accurately measure current and power in various applications. With its I2CTM- or SMBUS-compatible interface, the device offers easy integration and communication with microcontrollers and other digital systems. The INA226AQDGSRQ1 is particularly suitable for automotive and industrial applications where precise current and power measurements are essential for system efficiency, safety, and performance optimization.

Key Features and Specifications

Current Shunt Monitoring: The INA226AQDGSRQ1 allows for precise monitoring of current by measuring the voltage drop across a shunt resistor. This enables accurate current measurements in amperes.

  • Power Monitoring: The device also provides power monitoring capabilities by simultaneously measuring the shunt voltage drop and the bus supply voltage. This enables direct readouts of power in watts.
  • Programmable Calibration Value: The device allows users to program a calibration value to ensure accurate measurements in their specific application. This calibration value can be adjusted to compensate for any system-specific variations or inaccuracies.
  • Conversion Times and Averaging: The INA226AQDGSRQ1 offers programmable conversion times and averaging options, allowing users to strike a balance between measurement accuracy and speed.
  • Internal Multiplier: An internal multiplier within the device enhances measurement resolution, enabling more precise readings of current and power.
  • Common-Mode Bus Voltage Sensing: The device can sense current on common-mode bus voltages ranging from 0 V to 36 V, independently of the supply voltage. This makes it versatile and compatible with a wide range of electrical systems.
  • Addressability: The INA226AQDGSRQ1 supports up to 16 programmable addresses on the I2C-compatible interface, facilitating multiple device integration on the same bus.
  • Supply Voltage: The device operates from a single 2.7- to 5.5-V supply, making it suitable for various power supply configurations.
  • Supply Current: The INA226AQDGSRQ1 has a typical supply current of 330 A, ensuring low power consumption and minimal impact on system efficiency.

Operating Temperature Range and Supply Voltage

  • Operating Temperature Range: The device is specified to operate within a wide temperature range, from -40°C to 125°C. This enables reliable performance even in harsh environments with extreme temperature conditions.
  • Supply Voltage Range: The INA226AQDGSRQ1 operates from a single supply voltage ranging from 2.7 V to 5.5 V. This flexibility allows for integration into various systems with different power supply configurations.

The combination of its key features, precise measurements, and wide operating range make the INA226AQDGSRQ1 an excellent choice for applications that require accurate current and power monitoring, such as automotive systems, industrial automation, renewable energy systems, and electric vehicle monitoring.

How does the INA226AQDGSRQ1 enable current shunt monitoring?

The INA226AQDGSRQ1 enables current shunt monitoring through its innovative design and integrated features. Here’s how it works:

  • Current Shunt Resistor: The device is designed to measure the voltage drop across a current shunt resistor. A current shunt resistor is typically placed in series with the load or power path that you want to monitor. As current flows through the shunt resistor, a small voltage drop proportional to the current is generated.
  • Voltage Measurement: The INA226AQDGSRQ1 incorporates a high-precision voltage amplifier that measures the voltage drop across the current shunt resistor. This voltage measurement is critical for accurately determining the current flowing through the shunt resistor.
  • Calibration: To ensure accurate measurements, the device allows for a programmable calibration value. This calibration value can be adjusted to compensate for any variations or inaccuracies in the system. By calibrating the device, you can achieve precise current measurements that align with the actual current values.
  • Internal Multiplier: The INA226AQDGSRQ1 includes an internal multiplier that enhances measurement resolution. This internal multiplier enables more precise readings of current, allowing for finer measurement granularity.
  • I2CTM or SMBUS-Compatible Interface: The device features an I2CTM- or SMBUS-compatible interface, enabling easy communication with microcontrollers and other digital systems. This interface allows you to retrieve the measured current values and use them for various control, monitoring, or analysis purposes.
  • Addressability: The INA226AQDGSRQ1 supports up to 16 programmable addresses on the I2C-compatible interface. This addressability feature allows for multiple devices to be integrated onto the same I2C bus, making it suitable for applications that require monitoring multiple current shunts.

By combining these elements, the INA226AQDGSRQ1 facilitates accurate current shunt monitoring. It provides a reliable and precise method for measuring current in amperes, allowing you to monitor and control the current flowing through critical components or systems in your application. Whether it’s for system optimization, safety monitoring, or performance analysis, the INA226AQDGSRQ1 offers an effective solution for current shunt monitoring requirements.

Practical Applications

The INA226AQDGSRQ1 has practical applications in:

  • Battery management systems, ensuring optimal performance and extended battery life.
  • Industrial automation and control systems, enabling energy efficiency analysis and system optimization.
  • Renewable energy systems and inverters optimize energy conversion and ensure safe operation.
  • Electric vehicle monitoring and protection, preventing overloading, and ensuring safe charging

These applications benefit from the INA226AQDGSRQ1’s accurate current and power monitoring capabilities.


In conclusion, the INA226AQDGSRQ1 is a highly versatile current shunt and power monitor offering programmable calibration, precise measurements, and compatibility with a wide range of applications. From battery management to industrial automation, renewable energy to electric vehicle monitoring, this device is essential for optimizing systems, improving energy efficiency, and protecting critical components.

At ICRFQ, we are committed to supporting you in harnessing the full potential of the INA226AQDGSRQ1. Contact us today to tap into our expertise and guidance for maximizing the benefits of this current shunt and power monitor. Together, we can create secure and reliable solutions for your crucial control systems, leveraging the strength and adaptability of the INA226AQDGSRQ1.

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