INA190A5QDCKRQ1

Overview

The INA190A5QDCKRQ1 is a unidirectional current sense amplifier from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It features a fixed gain of 500 V/V and operates within a supply voltage range of 1.7 V to 5.5 V. The device supports bidirectional current sensing with a common-mode voltage range extending from -200 mV to 40 V. Key electrical specifications include a maximum input bias current of 500 pA, an input offset voltage of 3 uV, and a gain error of 0.08%. It provides a common-mode rejection ratio of 150 dB and has a gain-bandwidth product of 27 kHz. The component consumes 65 uA of quiescent current and functions reliably across an operating temperature range of -40°C to +125°C.

Feature Summary

• Automotive-grade reliability certified under the AEC-Q100 standard for robust performance in vehicle environments.
• Ultra-precise measurement capability enabled by picoampere-level input bias current and low offset voltage.
• Bidirectional current monitoring support allows detection of both sourcing and sinking currents relative to ground.

Applications

• Battery management systems in electric vehicles
• Motor control circuits
• High-side or low-side current monitoring

Procurement Notes

Verify that the specific suffix Q indicates automotive qualification status when sourcing. Confirm the package type matches the SC-70-6 footprint requirements for your PCB layout. Ensure the gain setting aligns with system accuracy needs as this variant has a fixed gain. Check datasheet revisions for any updates regarding recommended operating conditions.

Selection Notes

Select this component when high precision is required in automotive power monitoring. The fixed 500 V/V gain suits applications with small shunt voltages. Consider the SC-70-6 package size constraints during design. Verify compatibility with the system's common-mode voltage levels which extend below ground potential.

Part Context

This part belongs to the INA190 family of ultra-precise current sense amplifiers. The family offers various gain options and package configurations to suit different space and accuracy requirements. The Q-suffix variants are specifically engineered to meet stringent automotive industry standards for quality and longevity.

Replacement Considerations

Non-qualified equivalents like the INA190A5IDCKT lack automotive certification. Direct pin-compatible replacements may exist within the same family but require verification of gain and package dimensions.