INA381A2QDGSRQ1

Current Regulation/Management Overview

The INA381A2QDGSRQ1 is an automotive-grade current sense amplifier manufactured by Texas Instruments. It features a fixed gain of 50 V/V and supports bidirectional current sensing with a common-mode voltage range extending up to 26 V. The device operates on a single supply voltage between 2.7 V and 5.5 V, consuming a typical quiescent current of 350 µA. It offers a bandwidth of 350 kHz and includes an integrated over-current comparator for fault detection. Designed for high precision, it exhibits low input offset voltage and high common-mode rejection ratio, ensuring accurate monitoring in demanding environments.

Current Regulation/Management Feature Summary

• Integrated over-current comparator provides immediate fault signaling for system protection
• Bidirectional sensing capability allows accurate measurement of current flow in both directions
• High common-mode voltage tolerance enables direct connection to high-side or low-side shunts
• Automotive qualification ensures reliability under harsh operating conditions

Current Regulation/Management Applications

• Motor control systems requiring precise current feedback
• Power supply monitoring in automotive electronics
• Battery management systems for electric vehicles
• Industrial motor drives and inverters

Current Regulation/Management Procurement Notes

Verify the specific suffix QDGSRQ1 matches the required package and temperature grade. Confirm AEC-Q100 compliance is necessary for your application. Check moisture sensitivity levels before soldering. Ensure the fixed gain of 50 V/V suits your signal chain requirements. Validate that the 26 V common-mode range covers your maximum bus voltage.

Current Regulation/Management Selection Notes

Select this component when a fixed 50 V/V gain is optimal for your shunt resistor value. The integrated comparator simplifies design compared to discrete solutions. Consider the 350 kHz bandwidth for dynamic load applications. The 2.7 V to 5.5 V supply range fits standard 3.3 V and 5 V logic systems. Evaluate the VSSOP-10 package for space-constrained PCB layouts.

Current Regulation/Management Part Context

This part belongs to the INA381 family of current sense amplifiers from Texas Instruments. It shares architectural similarities with other members like the INA381A1 and INA381A3 but differs in fixed gain settings. The 'Q' prefix indicates automotive qualification, while 'RQ1' denotes reel packaging and specific grading. It complements other TI power management devices in complete system designs.

Current Regulation/Management Replacement Considerations

Direct substitutes include other INA381 variants with adjusted gains if circuit scaling permits. Verify pin compatibility with existing footprints. Cross-reference electrical parameters such as CMRR and offset voltage against original design margins.