INA190A4QDCKRQ1

Overview

The INA190A4QDCKRQ1 is a unidirectional current sense amplifier from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It features a gain of 200 V/V and operates within a supply voltage range of 1.7 V to 5.5 V. The device supports a common-mode voltage range from -200 mV to 40 V, enabling high-side or low-side sensing. Key electrical specifications include a maximum input bias current of 3 nA, an input offset voltage of 15 uV, and a CMRR of 132 dB. It consumes 90 uA of quiescent current and offers a 3-dB bandwidth of 33 kHz. The component is housed in a SC-70-6 package and functions reliably across temperatures from -40°C to +125°C.

Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for robust performance in vehicle environments.
• Ultra-low input bias current capability minimizes measurement errors when monitoring small signal variations.
• High common-mode rejection ratio ensures accurate data acquisition despite significant noise on the power rail.
• Bidirectional voltage tolerance allows flexible integration into both high-side and low-side circuit topologies.

Applications

• Battery management systems in electric vehicles
• Motor control circuits requiring precise current feedback
• Charging station infrastructure monitoring
• General automotive power distribution units

Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 automotive qualification status before procurement. Ensure the 'A4' designation matches the required 200 V/V gain for your schematic. Confirm the SC-70-6 package dimensions align with your PCB footprint constraints. Check humidity sensitivity levels if moisture barrier packaging is required for storage. Validate that the operating temperature range meets your specific environmental conditions.

Selection Notes

Select this part when automotive certification is mandatory for the application. Choose this model over non-qualified variants if long-term supply stability in the automotive sector is required. Consider the 200 V/V gain setting against available shunt resistor values to optimize output voltage swing. Evaluate the 90 uA quiescent current consumption against strict battery life requirements in standby modes.

Part Context

This component belongs to the INA190 family of ultraprecise current sense amplifiers. The family shares similar architectural features but varies in gain settings, package types, and qualification levels. The 'Q' suffix indicates automotive grade, while 'A4' specifies the internal gain configuration. Other members include lower gain variants or industrial-grade versions without the Q100 certification.

Replacement Considerations

Direct substitutes within the same family include INA190A4QDCKRQ1G4, which may differ only in lead-free compliance or minor manufacturing revisions. Verify pinout compatibility before swapping with other INA190 variants as gain differences affect system calibration.