INA181A2QDBVRQ1

Overview

The INA181A2QDBVRQ1 is a unidirectional current sense amplifier from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and consumes 195 µA of supply current. The device features a fixed gain of 50 V/V, an input offset voltage of 100 µV, and an input bias current of 75 µA. It provides a slew rate of 2 V/µs and a gain-bandwidth product of 210 kHz. The output is rail-to-rail, and it functions within a temperature range of -40°C to 125°C in a SOT-23-6 package.

Feature Summary

• Integrated precision resistor network ensures stable gain performance with minimal temperature drift.
• Rail-to-rail output capability allows direct interfacing with microcontrollers and ADCs across the full supply range.
• Automotive-grade construction meets AEC-Q100 standards for reliability in harsh environments.

Applications

• Battery management systems in electric vehicles
• Motor control and protection circuits
• High-side current monitoring in power distribution units

Procurement Notes

Verify the specific suffix QDBVRQ1 to confirm automotive grade and SOT-23-6 packaging. Ensure compatibility with your system's voltage levels and thermal requirements. Check for recent production change notices regarding marking or assembly materials. Confirm RoHS compliance status if required by your manufacturing process. Validate that the fixed gain of 50 V/V meets your signal conditioning needs without external components.

Selection Notes

Select this component when a fixed gain of 50 V/V is required for high-side sensing in automotive systems. It is suitable for applications needing low quiescent current and rail-to-rail output. Consider alternatives if bidirectional sensing or higher common-mode voltages are necessary. Verify that the 210 kHz bandwidth is sufficient for your switching frequencies. Ensure the SOT-23-6 package fits your PCB layout constraints.

Part Context

This part belongs to the INA181-Q1 family of current sense amplifiers. It shares architectural similarities with other members like the INA180-Q1 but differs in gain configuration and package options. The Q1 designation indicates automotive qualification, distinguishing it from commercial variants. It is often used alongside other TI automotive analog devices for comprehensive power management solutions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical specifications carefully before considering any non-official alternatives. Cross-referencing with the official datasheet is essential to ensure functional equivalence.