INA303A1QPWRQ1

Current Regulation/Management Overview

The INA303A1QPWRQ1 is a dual-channel, bidirectional current sense amplifier designed for automotive applications. It operates with a supply voltage range of 2.7 V to 5.5 V and supports common-mode voltages from 0 V to 36 V. Key electrical specifications include a gain bandwidth product of 550 kHz, a common-mode rejection ratio of 120 dB, and an input offset voltage of 15 µV. The device features a fixed gain of 20 V/V, a maximum gain error of 0.02%, and an input bias current of 115 µA. It consumes 850 µA of operating supply current and is available in a 14-TSSOP package.

Current Regulation/Management Feature Summary

• Automotive-grade qualification compliant with AEC-Q100 standards for reliability in vehicle systems.
• Bidirectional sensing capability supporting both high-side and low-side current monitoring configurations.
• High precision performance characterized by low input offset voltage and minimal gain error.

Current Regulation/Management Applications

• Battery management systems in electric vehicles
• Motor control circuits
• Power distribution units

Current Regulation/Management Procurement Notes

Verify the specific suffix 'Q1' confirms automotive grade status and AEC-Q100 compliance. Ensure the 'PWR' designation matches the required 14-TSSOP surface-mount package. Confirm the 'A1' variant aligns with the necessary gain and accuracy specifications for the target design. Cross-reference the manufacturer part number against official Texas Instruments documentation to validate authenticity and revision level before procurement.

Current Regulation/Management Selection Notes

Select this component when automotive reliability is mandatory alongside bidirectional current sensing needs. The 36 V common-mode range suits lower voltage automotive buses compared to higher voltage alternatives. Consider the 20 V/V fixed gain for direct interface with ADCs requiring moderate signal levels. Evaluate the 14-TSSOP footprint against board space constraints and thermal requirements within the -40°C to 125°C operating range.

Current Regulation/Management Part Context

This device belongs to the INA303 family of current sense amplifiers from Texas Instruments. It shares functional similarities with other automotive-qualified parts like the INA240 and INA253 series but offers distinct performance characteristics regarding common-mode voltage limits and channel count. The Q1 suffix specifically denotes its qualification for automotive environments, differentiating it from commercial variants.

Current Regulation/Management Replacement Considerations

INA303A1IPWR is the commercial grade equivalent without automotive qualification. INA303A1PWQ1 is the leaded alternative in a PW package. Verify pinout compatibility and parameter alignment when substituting.