INA4181A1QPWRQ1

Instrumentation, Op Amps, Buffer Amps Overview

The INA4181A1QPWRQ1 is an automotive-grade, quad-channel bidirectional current-sense amplifier manufactured by Texas Instruments. It supports both high-side and low-side voltage output configurations with a gain bandwidth product of 350 kHz. The device operates within a supply voltage range of 2.7 V to 5.5 V and withstands common-mode voltages up to 26 V. Key electrical specifications include a maximum input offset voltage of 100 µV, a typical input bias current of 75 µA, and a gain error of 0.1%. It features a rail-to-rail output and functions reliably across an extended temperature range from -40°C to +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments
• Quad-channel architecture enabling simultaneous monitoring of multiple current paths
• Bidirectional sensing capability supporting both high-side and low-side measurement topologies

Instrumentation, Op Amps, Buffer Amps Applications

• Automotive battery management systems
• Electric vehicle powertrain control units
• On-board charging systems
• DC-DC converter current monitoring

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 automotive qualification status. Ensure the package type matches the required PCB footprint. Confirm moisture sensitivity level handling requirements during assembly. Validate that the operating temperature range meets the specific application environment constraints. Check for any recent production change notices affecting marking or specifications.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when multi-channel current monitoring is required in automotive applications. The quad-channel design reduces board space compared to discrete single-channel solutions. The bidirectional feature allows for accurate measurement of charge and discharge currents. Consider the 350 kHz bandwidth for dynamic load response requirements. Verify compatibility with the system's common-mode voltage levels.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the INA4181 family of current-sense amplifiers designed for precision measurements. The 'Q1' designation indicates automotive grade qualification, distinguishing it from commercial variants like the INA4181A1IPWR. It shares functional similarities with other TI current-sense amplifiers but offers integrated quad-channel processing for complex power distribution networks.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

INA4181A1IPWR: Commercial grade equivalent without automotive qualification. INA4181A1PWPR: Same functionality with different packaging option.