INA280A5QDCKRQ1

Overview

The INA280A5QDCKRQ1 is an AEC-Q100 qualified current sense amplifier from Texas Instruments, designed for automotive applications. It operates within a supply voltage range of 2.7 V to 20 V and supports common-mode voltages from 2.7 V to 120 V. The device features a gain bandwidth product of 850 kHz and a gain error of 0.1%. Key electrical specifications include an input bias current of 20 uA, input offset voltage of 15 uV, and a common-mode rejection ratio (CMRR) of 140 dB. It consumes 370 uA of operating supply current and functions reliably across a temperature range of -40°C to +125°C in a compact SC-70 package.

Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for harsh environment operation
• High common-mode voltage tolerance up to 120 V enables direct sensing in high-side configurations
• Precision performance with low input offset voltage and high common-mode rejection ratio
• Compact SC-70 packaging facilitates space-constrained board layouts

Applications

• Automotive battery management systems
• Motor control circuits
• High-side current monitoring in power distribution units

Procurement Notes

Verify the specific suffix 'A5' indicates the fixed gain configuration required for your design, as gain options vary within the INA280 family. Confirm that the DCK package type matches your PCB footprint constraints. Ensure the Q1 designation aligns with your vehicle's component qualification requirements. Cross-reference the datasheet revision date to ensure compatibility with latest thermal and electrical guidelines before finalizing procurement orders.

Selection Notes

Select this component when high-side current sensing is required in automotive environments with common-mode voltages exceeding standard operational amplifier limits. The 140 dB CMRR makes it suitable for noisy power rails where signal integrity is critical. Compare against the INA280A4 variant if a different gain factor is needed, while noting the identical package and qualification status. Consider the 370 uA quiescent current impact on overall system efficiency during active operation phases.

Part Context

This part belongs to the INA280-Q1 series of current sense amplifiers optimized for automotive use. It shares the same physical footprint and basic architecture with other variants like the INA280A4QDCKRQ1, differing primarily in internal gain settings. The series is designed to replace discrete solutions or older generation amplifiers in modern electric and hybrid vehicle architectures requiring precise, robust current measurement.

Replacement Considerations

The INA280A4QDCKRQ1 serves as a functional substitute within the same package and qualification class, provided the circuit design accommodates its specific gain value. Verify pinout compatibility and thermal characteristics remain identical before swapping.