INA185A2QDCKRQ1

Overview

The INA185A2QDCKRQ1 is a bidirectional current-sense amplifier from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It operates on a single supply voltage ranging from 2.7V to 5.5V and supports common-mode voltages from -0.2V to 26V. The device features a fixed gain of 50 V/V, a bandwidth of 210 kHz, and a maximum quiescent current of 260µA. It offers high precision with an offset voltage of ±55µV at 12V common-mode voltage and a gain error of ±0.2%. Packaged in a compact SC-70-6 footprint, it includes rail-to-rail output swing capabilities.

Feature Summary

• Bidirectional current sensing capability allows measurement of current flow in both directions through a shunt resistor.
• High common-mode voltage range extends from -0.2V to 26V, independent of the power supply voltage.
• Integrated matched resistor network minimizes gain error and reduces temperature drift for improved accuracy.
• Rail-to-rail output swing enables linear operation close to the supply rails and ground.

Applications

• Body Control Modules
• Zonal Control Modules
• ADAS Domain Controllers
• ADAS Sensor Diagnostics

Procurement Notes

Verify the specific suffix 'A2' confirms the 50 V/V gain option when ordering. Ensure the 'Q1' designation matches automotive reliability requirements. Confirm the 'DCKR' package code corresponds to the SC-70-6 reel format. Cross-reference the manufacturer part number against official TI documentation to validate authenticity and revision status before integration into production designs.

Selection Notes

Select this component for space-constrained automotive systems requiring precise bidirectional current monitoring. The 50 V/V gain suits applications needing moderate amplification without excessive output saturation. Consider the 210 kHz bandwidth for motor control or fault detection speeds. Evaluate the 260µA quiescent current against system power budgets. Verify that the SC-70-6 package fits the available PCB real estate constraints.

Part Context

This device belongs to the INA185-Q1 family of high-precision, bidirectional current-sense amplifiers. It shares the same core architecture and packaging as other gain variants within the series, differing primarily in internal resistor networks that set the fixed gain options. The family is optimized for cost-sensitive, space-limited automotive environments while maintaining functional safety capabilities.

Replacement Considerations

Other gain variants within the INA185-Q1 family, such as INA185A1QDCKRQ1 (20 V/V), INA185A3QDCKRQ1 (100 V/V), or INA185A4QDCKRQ1 (200 V/V), share identical pinouts and electrical characteristics except for gain. Substitution requires verifying that the alternative gain factor meets the system's signal conditioning requirements.