INA2181A2QDGSRQ1

Overview

The INA2181A2QDGSRQ1 is a bidirectional, low- and high-side voltage output current-sense amplifier from Texas Instruments. It features a fixed gain of 50 V/V and supports common-mode voltages up to 26 V. The device operates with a supply voltage range of 2.7 V to 5.5 V and includes an internal reference for accurate measurements. Designed for automotive applications, it meets AEC-Q100 standards and offers a bandwidth of 350 kHz.

Feature Summary

• Bidirectional operation enables detection of current flow in both directions.
• Supports both low-side and high-side sensing configurations.
• Integrated internal reference ensures measurement accuracy without external components.
• Automotive-grade qualification ensures reliability in harsh environments.

Applications

• Automotive battery monitoring systems
• Motor control current sensing
• High-side load switch protection

Procurement Notes

Verify the specific suffix QDGSRQ1 matches the required package and temperature grade. Confirm AEC-Q100 certification requirements for your target application. Check for any recent lifecycle notices or obsolescence warnings directly from Texas Instruments documentation before finalizing procurement plans.

Selection Notes

Select this component when bidirectional current sensing is required with a fixed 50 V/V gain. Ensure the system common-mode voltage does not exceed 26 V. Verify that the 350 kHz bandwidth meets the dynamic response needs of the application. Consider the VSSOP-10 package constraints for PCB layout.

Part Context

This part belongs to the INA2181 family of current-sense amplifiers. It shares functional similarities with other automotive-grade sensors like the INA181-Q1 but offers specific gain and voltage characteristics tailored for high-side and low-side monitoring in automotive power distribution networks.

Replacement Considerations

Direct substitutes include other Texas Instruments parts within the INA2181 series with compatible gains and packages. Cross-reference with the INA181-Q1 if bidirectional sensing is needed but different gain specifications are acceptable. Always verify pinout and electrical parameters against official datasheets.