INA190A1QDCKRQ1

Overview

The INA190A1QDCKRQ1 is an AEC-Q100 qualified, bidirectional current shunt monitor manufactured by Texas Instruments. It operates with a supply voltage range of 1.7V to 5.5V and supports common-mode voltages from -200mV to +40V. The device features a fixed gain of 25V/V, a typical supply current of 65µA, and a maximum input offset voltage of ±3µV. It offers a common-mode rejection ratio (CMRR) of 150dB and a gain error of -0.04%. The component functions within an extended temperature range of -40°C to +125°C and is housed in a compact SOT-23-THIN-8 package.

Feature Summary

• Automotive-grade reliability certified under the AEC-Q100 standard for robust performance in vehicle environments.
• Bidirectional sensing capability enables accurate detection of current flow in both directions across the shunt resistor.
• Ultra-low input bias current facilitates precise measurement of microamp-level currents using larger sense resistors.

Applications

• Battery management systems in electric vehicles
• Motor control circuits requiring high-side or low-side current monitoring
• Overcurrent protection mechanisms in automotive power distribution

Procurement Notes

Verify that the specific suffix QDCKRQ1 corresponds to the AEC-Q100 qualification and SOT-23-THIN-8 packaging configuration. Confirm the gain setting matches the required system design, as the 'A1' designation indicates a fixed 25V/V gain. Ensure compatibility with automotive environmental standards before finalizing procurement specifications.

Selection Notes

Select this component when automotive certification is mandatory and bidirectional current monitoring is required. The 25V/V gain option suits applications where moderate amplification is sufficient for the expected shunt voltage drop. Consider the SOT-23-THIN-8 package if board space is constrained, while noting its thermal characteristics relative to larger packages.

Part Context

This part belongs to the INA190 family of ultra-precise current shunt monitors designed for high-performance sensing. The 'Q1' suffix denotes automotive qualification, distinguishing it from commercial variants like the INA190A1DCKR. It complements other precision amplifiers by offering integrated signal conditioning specifically optimized for shunt-based current measurement in demanding industrial and automotive sectors.

Replacement Considerations

INA190A1DCKRQ1