INA253A3QPWRQ1

Overview

The INA253A3QPWRQ1 is a high-side current sense amplifier from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It features a bidirectional output and operates within a common-mode voltage range of -4 V to 80 V. The device provides a gain of 25 V/V and maintains a maximum gain error of 0.1%. Key electrical specifications include a 350 kHz bandwidth, 125 dB common-mode rejection ratio (CMRR), and an input bias current of 90 uA. It functions on a supply voltage between 2.7 V and 5.5 V, consuming 3 mA of operating current. The component supports an extended temperature range from -40°C to +125°C and is housed in a TSSOP-20 package.

Feature Summary

• Bidirectional precision current sensing capability for accurate measurement in both directions.
• High common-mode voltage tolerance up to 80 V for robust high-side monitoring.
• Automotive-grade reliability certified under AEC-Q100 standards.

Applications

• Automotive battery management systems
• Motor control circuits
• Load switch monitoring

Procurement Notes

Verify the specific suffix 'A3' corresponds to the required 25 V/V gain configuration, as other variants exist within the INA253 family. Confirm that the TSSOP-20 package aligns with your PCB footprint requirements. Ensure the design accounts for the specified 3 mA quiescent current draw relative to system power budgets. Validate thermal performance within the -40°C to +125°C operating range for your intended environment.

Selection Notes

Select this component when a bidirectional output is necessary for detecting reverse current flow in high-side applications. The 25 V/V gain offers a balance between signal amplification and dynamic range compared to higher gain options. Consider the 80 V common-mode range suitability for 12V or 24V automotive systems. The AEC-Q100 qualification makes it appropriate for safety-critical automotive electronics requiring standardized reliability metrics.

Part Context

This part belongs to the INA253-Q1 series of current sense amplifiers. It shares the same core architecture and pinout with other gain variants like the INA253A1 and INA253A2, differing primarily in internal resistor networks that set the voltage gain. The series is engineered for automotive environments, offering high accuracy and low offset voltage characteristics essential for precise current monitoring in vehicle power distribution networks.

Replacement Considerations

Direct substitutes within the same family include INA253A1QPWRQ1 (100 V/V gain) and INA253A2QPWRQ1 (50 V/V gain). These parts share identical pinouts and functionality but require circuit adjustments due to different gain factors. Verify if the application can tolerate the altered sensitivity before swapping gain variants.