INA2181A3QDGSRQ1

Overview

The INA2181A3QDGSRQ1 is a bidirectional current sense amplifier from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It features a fixed gain of 100 V/V and operates within a supply voltage range of 2.7 V to 5.5 V. The device supports a common-mode voltage range of -200 mV to 26 V, enabling high-side or low-side sensing. Key electrical specifications include a maximum input offset voltage of 100 uV, a typical input bias current of 75 uA, and a bandwidth of 150 kHz. It consumes 260 uA of quiescent current and offers a CMRR of 100 dB.

Feature Summary

• Bidirectional operation allows detection of both positive and negative current flows relative to the ground reference.
• High common-mode voltage tolerance enables flexible placement in either high-side or low-side circuit configurations.
• Automotive-grade reliability ensures stable performance across the specified industrial temperature range.

Applications

• Battery management systems in electric vehicles
• Motor control circuits
• Load switch monitoring

Procurement Notes

Verify the specific suffix QDGSRQ1 matches the required package type and automotive grade. Confirm that the fixed gain of 100 V/V aligns with system signal requirements. Ensure the common-mode voltage range covers the expected operating conditions. Check for any recent product lifecycle notices regarding availability.

Selection Notes

Select this component when bidirectional sensing is required within a 26 V common-mode window. The 100 V/V gain suits applications needing moderate amplification without external resistors. Consider the 260 uA quiescent current for power-sensitive designs. Verify compatibility with the 10-VSSOP package constraints.

Part Context

This part belongs to the INA2181 family of current sense amplifiers. It shares architectural similarities with other members but differs in gain and package options. The 'Q' suffix indicates AEC-Q100 automotive qualification, while 'DGSR' specifies the VSSOP-10 tape-and-reel packaging.

FAQ

Can the INA2181A3QDGSRQ1 measure reverse current?

Yes, it is a bidirectional amplifier capable of detecting current flow in both directions relative to the ground.

What is the maximum common-mode voltage supported?

The device supports a common-mode voltage range extending up to 26 V.