INA303A3QPWRQ1

Current Regulation/Management Overview

The INA303A3QPWRQ1 is a high-speed, bidirectional current sense amplifier from Texas Instruments, designed for automotive applications under the AEC-Q100 qualification. It features a gain of 20 V/V and operates with a supply voltage range of 2.7 V to 5.5 V. The device supports common-mode voltages up to 36 V and offers a bandwidth of 550 kHz. Key electrical specifications include an input offset voltage of 15 µV, a CMRR of 120 dB, and a gain error of 0.02%. It is housed in a 14-TSSOP package and functions within a temperature range of -40°C to +125°C.

Current Regulation/Management Feature Summary

• Bidirectional sensing capability for accurate current measurement in both directions.
• High-speed performance with a 550 kHz bandwidth for dynamic load monitoring.
• Automotive-grade reliability certified to AEC-Q100 standards.

Current Regulation/Management Applications

• Automotive battery management systems
• Motor control circuits
• High-side and low-side current monitoring

Current Regulation/Management Procurement Notes

Verify the specific suffix 'A3' corresponds to the required gain setting and accuracy grade. Confirm AEC-Q100 certification requirements match the target automotive application. Ensure the 14-TSSOP package dimensions fit the PCB layout constraints. Check moisture sensitivity level (MSL) handling procedures during assembly.

Current Regulation/Management Selection Notes

Select this component when bidirectional current sensing is required in automotive environments. The 20 V/V gain suits applications needing moderate signal amplification. Consider the 550 kHz bandwidth for fast transient response needs. Verify that the 36 V common-mode voltage range covers the system's maximum operating voltage.

Current Regulation/Management Part Context

This part belongs to the INA303-Q1 family of current sense amplifiers. It shares architectural similarities with other automotive-qualified devices in the series but is distinguished by its specific gain and speed characteristics. The Q1 designation indicates compliance with automotive quality and reliability standards.

Current Regulation/Management Replacement Considerations

Check for direct pin-compatible alternatives within the INA303-Q1 family. Verify if higher or lower gain variants meet the system requirements without circuit redesign. Ensure any substitute maintains AEC-Q100 certification and similar thermal performance.

Current Regulation/Management FAQ

What is the maximum common-mode voltage supported?

The INA303A3QPWRQ1 supports a common-mode voltage range up to 36 V.

Is this device suitable for bidirectional current sensing?

Yes, it is specifically designed for bidirectional current sensing applications.