INA250A4QPWRQ1

Overview

The INA250A4QPWRQ1 is an AEC-Q100 qualified, bi-directional precision current sense amplifier from Texas Instruments. It features a fixed gain of 2 V/A and operates with a supply voltage range of 2.7 V to 36 V. The device draws a maximum operating supply current of 350 µA and offers high accuracy with a gain error of 0.3%. It supports both high-side and low-side sensing configurations within a common-mode voltage range of -4 V to 80 V. Packaged in a 16-pin TSSOP, it functions reliably across an extended temperature range of -40°C to +125°C.

Feature Summary

• Automotive-grade reliability certified under the AEC-Q100 standard for automotive applications.
• Bi-directional current sensing capability supporting both sourcing and sinking currents.
• Integrated internal shunt resistor architecture eliminates external components and simplifies PCB layout.
• High common-mode rejection ratio ensures accurate measurements in noisy electrical environments.

Applications

• Electric vehicle battery management systems
• Motor control and drive circuits
• Industrial power supply monitoring

Procurement Notes

Verify that the specific suffix 'Q' confirms AEC-Q100 automotive qualification status. Confirm the 'PWR' package designation matches the required 16-lead TSSOP footprint. Ensure the 'A4' gain code aligns with the system's 2 V/A sensitivity requirements. Check humidity sensitivity levels for proper storage and reflow soldering profiles.

Selection Notes

Select this component when automotive certification is mandatory for current monitoring. The integrated shunt design reduces bill-of-materials count compared to discrete solutions. Consider the 36 V supply limit and 80 V common-mode range for compatibility with bus voltages. Evaluate the 350 µA quiescent current against strict power budget constraints in portable or battery-operated devices.

Part Context

This part belongs to the INA250 family of current sense amplifiers designed for high-precision monitoring. The Q100 variant specifically targets automotive electronics requiring robust performance under varying thermal and electrical conditions. It serves as a specialized solution for applications demanding reliable current feedback in electric vehicles and industrial automation systems.

Replacement Considerations

The INA250A4PWR is the non-automotive commercial grade equivalent. Verify if AEC-Q100 certification is strictly required before substituting. Other family members like INA250A1 or INA250A2 offer different gain codes but share similar architectural features.

FAQ

Does the INA250A4QPWRQ1 support bidirectional current flow?

Yes, the device is designed to measure both positive and negative currents, allowing for accurate monitoring of charging and discharging cycles.

What is the maximum common-mode voltage supported?

The amplifier can withstand common-mode voltages ranging from -4 V to 80 V, making it suitable for high-voltage bus monitoring.