INA181A4QDBVRQ1

Overview

The INA181A4QDBVRQ1 is a unidirectional current sense amplifier from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It operates within a supply voltage range of 2.7 V to 5.5 V and supports a common-mode voltage up to 26 V. The device features a fixed gain of 200 V/V, a gain bandwidth product of 350 kHz, and a maximum input offset voltage of 100 µV. It draws 260 µA of operating current and provides an analog voltage output in a SOT-23-6 package.

Feature Summary

• Bidirectional current sensing capability with high common-mode voltage tolerance
• Fixed precision gain configuration for simplified circuit design
• Low power consumption suitable for battery-operated systems
• Automotive-grade reliability certified under AEC-Q100 standards

Applications

• Battery management systems in electric vehicles
• Motor control current monitoring
• High-side load switching protection
• Power distribution unit current measurement

Procurement Notes

Verify the specific suffix 'A4' confirms the fixed 200 V/V gain setting, as other suffixes indicate different gains. Ensure the 'Q1' designation matches your automotive qualification requirements. Confirm the SOT-23-6 package aligns with your PCB footprint constraints. Cross-reference the datasheet revision date to ensure compatibility with your design specifications.

Selection Notes

Select this component when a fixed high gain is required for low-side or high-side current sensing in automotive environments. It is suitable for applications demanding bidirectional measurement capabilities and robust common-mode rejection. Consider the 350 kHz bandwidth for dynamic load monitoring. Verify that the 26 V common-mode limit meets your system's voltage rails.

Part Context

This part belongs to the INA181-Q1 family of current sense amplifiers. It shares architectural similarities with the INA180 and INA2181 series but offers distinct gain options and bidirectional functionality. The Q1 suffix denotes automotive grade compliance, distinguishing it from commercial variants like the standard INA181.

Replacement Considerations

INA181A1QDBVRQ1 (Gain 20 V/V), INA181A2QDBVRQ1 (Gain 50 V/V), INA181A3QDBVRQ1 (Gain 100 V/V). These parts share the same package and pinout but differ in fixed gain settings.