INA280A1QDCKRQ1

Overview

The INA280A1QDCKRQ1 is an automotive-grade, high-precision current sense amplifier manufactured by Texas Instruments. It operates with a supply voltage range of 2.7 V to 20 V and supports common-mode voltages from 2.7 V up to 120 V. The device features a fixed gain of 50 V/V, a bandwidth of 900 kHz, and a maximum gain error of 0.1%. It includes an internal reference for accurate output scaling and offers a CMRR of 140 dB. Packaged in a compact SC-70-5 footprint, it functions within a temperature range of -40°C to +125°C.

Feature Summary

• Supports bidirectional current sensing with high common-mode voltage tolerance up to 120 V
• Provides high precision with low gain error and high common-mode rejection ratio
• Integrates an internal reference voltage to simplify system design and reduce component count

Applications

• Automotive battery management systems
• High-side current monitoring in electric vehicles
• Industrial motor control circuits

Procurement Notes

Verify the specific suffix 'A1' indicates the 50 V/V gain configuration when sourcing. Confirm AEC-Q100 qualification status for automotive reliability requirements. Ensure the SC-70-5 package matches the PCB footprint constraints. Cross-reference the datasheet for thermal performance under expected load conditions.

Selection Notes

Select this component for applications requiring precise current measurement in high-voltage environments. The 50 V/V gain suits scenarios where moderate signal amplification is needed without external resistors. Consider the 900 kHz bandwidth for dynamic load monitoring. Evaluate the SC-70-5 package size against available board space.

Part Context

This part belongs to the INA280 family of high-precision current sense amplifiers designed for automotive and industrial use. The Q1 suffix denotes AEC-Q100 qualification for automotive grade reliability. The A1 variant specifically provides a fixed gain of 50 V/V, distinguishing it from other gain options in the series.