INA280A4QDCKRQ1

Overview

The INA280A4QDCKRQ1 is a high-precision, unidirectional current sense amplifier from Texas Instruments, designed for automotive applications under the AEC-Q100 qualification standard. It features a fixed gain of 200 V/V and supports a wide common-mode voltage range from 2.7 V to 120 V. Key electrical parameters include a maximum input offset voltage of 15 uV, an input bias current of 20 uA, and a gain error of 0.1%. The device operates with a supply voltage between 2.7 V and 20 V, consuming 370 uA of quiescent current. It offers a gain-bandwidth product of 900 kHz and a common-mode rejection ratio of 140 dB. The component is housed in a SC-70-5 package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Automotive-grade reliability certified to AEC-Q100 standards for robust performance in vehicle environments.
• High precision architecture ensures minimal measurement errors through low offset voltage and high common-mode rejection.
• Wide common-mode voltage capability allows accurate sensing across high-side configurations up to 120 V.

Applications

• Automotive battery monitoring systems
• Electric power steering control units
• Body electronics current protection circuits

Procurement Notes

Verify the specific suffix QDCKRQ1 confirms AEC-Q100 automotive qualification and the '4' indicates the 200 V/V gain setting. Ensure the SC-70-5 package matches your PCB footprint requirements. Confirm that the 120 V common-mode limit aligns with your system's bus voltage specifications during procurement review.

Selection Notes

Select this component when high accuracy is required in high-voltage automotive environments. The 200 V/V gain suits applications with small shunt voltages needing significant amplification. Consider the 900 kHz bandwidth for dynamic load responses. Verify that the 2.7 V minimum supply voltage fits your system's power rails compared to lower-voltage alternatives.

Part Context

This part belongs to the INA280 family of current sense amplifiers, specifically tailored for automotive use. It complements other TI sensors by providing high-side current monitoring capabilities. The device integrates precision resistors internally to maintain gain stability without external components, distinguishing it from discrete operational amplifier solutions.

Replacement Considerations

Direct substitutes include other AEC-Q100 qualified current sense amplifiers with similar 200 V/V gain and 120 V common-mode ranges. Check pin compatibility for SC-70-5 packages. Evaluate if alternative gains like 50 V/V or 100 V/V are acceptable for your specific signal conditioning needs.