INA181A3QDBVRQ1

Overview

The INA181A3QDBVRQ1 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 supports common-mode voltages from -200 mV to 26 V. The device features a fixed gain of 100 V/V, a bandwidth of 350 kHz, and low input offset voltage of 100 µV. It consumes approximately 195 µA of supply current and provides rail-to-rail output swing within an SOT-23-6 package.

Feature Summary

• AEC-Q100 qualified for automotive reliability standards
• Unidirectional current sensing capability
• Rail-to-rail output stage design
• Low quiescent current consumption

Applications

• Automotive battery monitoring systems
• High-side or low-side current protection circuits
• Load switch control applications

Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 automotive grade status against the manufacturer datasheet. Confirm the 'A3' designation corresponds to the fixed 100 V/V gain setting. Ensure the SOT-23-6 package matches the target PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when a fixed high gain is required for precise low-current measurements in automotive environments. The 350 kHz bandwidth suits general-purpose switching applications. Compare against the INA180 series if bidirectional sensing or different gain options are needed instead.

Part Context

This part belongs to the INA181-Q1 family of current sense amplifiers. It shares the core architecture with other variants like the INA181A1 and INA181A2, differing primarily in the internal resistor network that sets the specific voltage gain. All members offer similar power and bandwidth characteristics.

Replacement Considerations

The INA181A1QDCKRQ1 and INA181A2QDBVRQ1 are functional substitutes within the same family. Verify that the gain difference (10 V/V vs 20 V/V) does not impact system accuracy requirements before swapping.