INA381A1QDGSRQ1

Current Regulation/Management Overview

The INA381A1QDGSRQ1 is an automotive-grade, bidirectional current sense amplifier featuring a fixed gain of 20 V/V. It operates within a supply voltage range of 2.7 V to 5.5 V and supports common-mode voltages from -4 V to 110 V. The device integrates an over-current comparator with an alert output. Key electrical specifications include a maximum input offset voltage of 150 µV, a minimum common-mode rejection ratio (CMRR) of 84 dB, and a bandwidth of 350 kHz. It functions reliably across an extended temperature range of -40°C to +125°C.

Current Regulation/Management Feature Summary

• Supports bidirectional current sensing in high-side configurations with wide common-mode voltage coverage.
• Integrates a zero-drift architecture to minimize offset voltage drift over temperature variations.
• Includes an integrated over-current comparator for immediate fault detection and system protection.

Current Regulation/Management Applications

• Automotive battery management systems
• Electric vehicle motor control circuits
• On-board charger (OBC) current monitoring

Current Regulation/Management Procurement Notes

Verify the specific suffix 'Q' confirms AEC-Q100 qualification status required for automotive integration. Confirm the package marking matches the VSSOP-10 form factor. Ensure the ordering part number aligns with the intended gain configuration and reel packaging specifications before finalizing procurement orders.

Current Regulation/Management Selection Notes

Select this component when bidirectional sensing is required alongside high common-mode voltage tolerance up to 110 V. The fixed 20 V/V gain suits applications needing moderate amplification without external resistor networks. Consider the integrated comparator if discrete fault detection logic is desired to simplify circuit design.

Current Regulation/Management Part Context

This device belongs to the INA381 family of current sense amplifiers designed for robust industrial and automotive environments. It complements other Texas Instruments solutions by offering a balance of precision and cost-effectiveness. The Q-series designation indicates compliance with automotive reliability standards, distinguishing it from standard commercial variants.

Current Regulation/Management Replacement Considerations

Direct pin-to-pin replacements within the same family include INA381A2QDGSRQ1 and INA381A3QDGSRQ1, which offer different fixed gains. Verify that the alternative gain setting meets the signal conditioning requirements of the target application circuit.