INA190A2QDCKRQ1

Overview

The INA190A2QDCKRQ1 is a unidirectional current sense amplifier from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It features a fixed gain of 50 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, ensuring compatibility with high-side and low-side sensing configurations. Key electrical specifications include a maximum input bias current of 3 nA, an input offset voltage of 15 uV, and a gain error of 0.3%. It exhibits a common-mode rejection ratio (CMRR) of 132 dB and a 3dB bandwidth of 37 kHz. The component consumes 90 uA of operating current and functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• AEC-Q100 qualified for automotive reliability standards
• Bidirectional capability with wide common-mode voltage support
• Ultra-low input bias current for minimal signal loss
• High precision with low gain error and offset voltage

Applications

• Automotive battery monitoring systems
• Electric vehicle powertrain control units
• Charging station current measurement
• High-side and low-side current sensing in automotive ECUs

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free and RoHS compliance status as per manufacturer documentation. Confirm the package type SC-70-6 matches the design footprint requirements. Ensure the AEC-Q100 grade aligns with the target automotive application's thermal and reliability specifications. Check for moisture sensitivity level (MSL) ratings if reflow soldering processes are involved. Validate that the bidirectional operation mode meets the system's current flow direction needs.

Selection Notes

Select this component when automotive-grade certification is mandatory for current sensing applications. The 50 V/V gain is suitable for detecting moderate current levels with standard ADC inputs. Consider the 3 nA input bias current for high-impedance shunt resistor applications to minimize measurement errors. The wide common-mode voltage range allows flexibility in circuit topology, supporting both high-side and low-side placements relative to the load.

Part Context

This part belongs to the INA190 family of ultra-precise current sense amplifiers. Unlike other variants such as the INA190A5QDCKRQ1 which offers a higher gain of 500 V/V, or the INA190A1QDCKRQ1 with 25 V/V, this specific model provides a balanced 50 V/V gain. It shares the SC-70-6 package and AEC-Q100 qualification with peers like the INA190A2QDDFRQ1 but differs in package style and potentially detailed electrical tolerances defined by the specific series designation.

Replacement Considerations

Direct substitutes within the same family include INA190A2QDDFRQ1 (SOT-23-THIN-8 package) and INA190A2IRSWR (UQFN-10 package). For different gain requirements, consider INA190A1QDCKRQ1 (25 V/V) or INA190A5QDCKRQ1 (500 V/V). Ensure any replacement maintains the AEC-Q100 qualification and compatible pinout or adapter strategy if packages differ.