INA199B2QDCKRQ1

Current Regulation/Management Overview

The INA199B2QDCKRQ1 is a high-side current sense amplifier from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It features a gain of 100 V/V and supports bidirectional current sensing within a supply voltage range of 2.7 V to 26 V. The device offers a maximum common-mode voltage of 12 V and achieves a typical CMRR of 120 dB. Key electrical parameters include an input offset voltage of 5 uV, input bias current of 28 uA, and a gain error of 0.03%. It operates over a temperature range of -40°C to +125°C and consumes 115 uA of quiescent current.

Current Regulation/Management Feature Summary

• Zero-drift architecture ensures high precision with low offset voltage and drift.
• Bidirectional capability allows accurate measurement of both sourcing and sinking currents.
• High common-mode rejection ratio provides stability in noisy environments.
• Automotive-grade reliability meets AEC-Q100 standards for harsh conditions.

Current Regulation/Management Applications

• Battery management systems in electric vehicles
• Motor control circuits
• Power distribution units
• Charging station infrastructure

Current Regulation/Management Procurement Notes

Verify the specific suffix 'B2' confirms the fixed gain of 100 V/V, as other variants exist within the INA199 family. Ensure the 'Q1' designation aligns with your project's automotive quality requirements. Confirm the SC-70-6 package matches your PCB footprint constraints. Check moisture sensitivity level (MSL) ratings for proper storage and reflow soldering profiles according to JEDC standards.

Current Regulation/Management Selection Notes

Select this component when precise bidirectional current monitoring is required in high-common-mode voltage environments. The zero-drift technology minimizes calibration needs compared to standard amplifiers. Consider the 12 V common-mode limit; if higher voltages are present, alternative models like the INA293 series may be necessary. Evaluate the 100 V/V gain against expected shunt resistor values to ensure output swing compatibility with downstream ADCs or microcontrollers.

Current Regulation/Management Part Context

This part belongs to the INA199 family of zero-drift current sense amplifiers. It shares the SC-70-6 package and general functionality with siblings like the INA199B1QDCKRQ1 and INA199B3QDCKRQ1, differing primarily in fixed gain settings. The family is optimized for automotive electrification, offering robust performance in powertrain and battery applications where accuracy and reliability are critical.

Current Regulation/Management Replacement Considerations

Publicly confirmed substitutes include the ZXCT199QB1DW-7 from Diodes Incorporated. Verify pinout compatibility and electrical parameter alignment before substitution. Note that while similar, differences in gain accuracy, bandwidth, or package dimensions may require design adjustments.

Current Regulation/Management FAQ

What is the maximum common-mode voltage supported by this device?

The INA199B2QDCKRQ1 supports a maximum common-mode voltage of 12 V.

Is this amplifier suitable for bidirectional current sensing?

Yes, the device is explicitly designed for bidirectional current sensing applications.

What is the input offset voltage specification?

The typical input offset voltage is 5 uV, ensuring high precision measurements.