INA250A1QPWRQ1

Overview

The INA250A1QPWRQ1 is a bidirectional, zero-drift current-shunt monitor from Texas Instruments. It integrates an internal precision shunt resistor to enable high-accuracy current measurement across a common-mode voltage range of 0V to 36V. The device operates on a single supply voltage between 2.7V and 36V with a typical quiescent current of 350µA. It features a gain of 100mA/V and maintains accuracy within 0.3%. Designed for automotive applications, it meets AEC-Q100 standards and functions reliably within an operating temperature range of -40°C to +125°C.

Feature Summary

• Integrates an internal precision shunt resistor to simplify PCB design and reduce component count.
• Provides bidirectional current sensing capability with zero-drift technology for high accuracy.
• Supports operation over a wide common-mode voltage range from 0V to 36V.
• Meets AEC-Q100 qualification standards for automotive reliability.

Applications

• Automotive battery management systems
• High-side or low-side current monitoring in electric vehicles
• Motor control circuits requiring precise current feedback

Procurement Notes

Verify the specific suffix 'A1' indicates the fixed gain configuration and 'Q1' confirms automotive grade qualification. Ensure the TSSOP-16 package matches your board layout constraints. Confirm that the 0V to 36V common-mode range aligns with your system's bus voltage requirements before finalizing procurement.

Selection Notes

Select this component when integrated shunt resistance is preferred to save space and improve thermal performance compared to external resistors. It is suitable for designs requiring bidirectional sensing without external calibration components. Consider the 350µA quiescent current for power-sensitive applications. Verify compatibility with the 2.7V minimum supply voltage for low-power microcontroller interfaces.

Part Context

This part belongs to the INA250-Q1 family of current-sense amplifiers designed specifically for automotive environments. It offers a compact solution by combining the amplifier and shunt resistor into a single package. The series is characterized by its zero-drift architecture, which minimizes offset voltage errors over temperature variations, ensuring consistent performance in demanding automotive electrical systems.

Replacement Considerations

Check for direct substitutes within the INA250 family with different gain options or packages. Verify if non-automotive grades like the standard INA250 are acceptable for the application. Ensure any replacement maintains the 36V common-mode limit and bidirectional functionality.

FAQ

What is the common-mode voltage range of the INA250A1QPWRQ1?

The device supports a common-mode voltage range from 0V to 36V.

Does the INA250A1QPWRQ1 support bidirectional current sensing?

Yes, it is a bidirectional current-shunt monitor capable of measuring current flow in both directions.

What is the maximum operating temperature for this component?

The maximum operating temperature is +125°C.