INA199B1QDCKRQ1

Current Regulation/Management Overview

The INA199B1QDCKRQ1 is a high-side 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 2.7 V to 26 V. The device supports bidirectional current sensing with a common-mode voltage up to 12 V. Key electrical specifications include a maximum input offset voltage of 5 uV, an input bias current of 28 uA, and a gain error of 0.03%. It achieves a common-mode rejection ratio (CMRR) of 120 dB and has a gain-bandwidth product of 80 kHz. The amplifier draws 115 uA of operating current and maintains accuracy within 1.5%. It functions reliably across an extended temperature range from -40°C to +125°C.

Current Regulation/Management Feature Summary

• Zero-drift architecture ensures high precision by minimizing input offset voltage drift over temperature and time.
• Bidirectional sensing capability allows detection of both positive and negative current flows relative to the reference.
• High common-mode rejection ratio provides accurate measurements in noisy environments with significant common-mode voltages.

Current Regulation/Management Applications

• Automotive battery management systems requiring precise current monitoring
• Motor control circuits for bidirectional current feedback
• High-side load switching protection in vehicle electronics

Current Regulation/Management Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 automotive grade compliance and 'B1' indicates the 50 V/V gain setting. Ensure the SC-70-6 package matches your PCB footprint constraints. Confirm moisture sensitivity level requirements align with your reflow profile capabilities. Cross-reference the manufacturer part number against official Texas Instruments documentation to avoid counterfeit components.

Current Regulation/Management Selection Notes

Select this component when bidirectional high-side current sensing is required in automotive environments. The zero-drift technology is critical for applications demanding low offset voltage stability without external calibration. The 50 V/V gain suits scenarios where moderate signal amplification is needed for standard ADC interfaces. Consider the 12 V common-mode limit to ensure compatibility with the system's power rail voltage levels.

Current Regulation/Management Part Context

This device belongs to the INA199 family of current sense amplifiers. The 'Q1' designation signifies automotive qualification under AEC-Q100 standards. The 'B1' suffix denotes a fixed gain of 50 V/V. Other variants in the series offer different gain options or package types. The family is characterized by zero-drift performance and high common-mode rejection ratios suitable for demanding industrial and automotive applications.

Current Regulation/Management Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify compatibility with alternative devices based on pinout, gain, and package dimensions through official datasheets.

Current Regulation/Management FAQ

What is the maximum common-mode voltage supported by the INA199B1QDCKRQ1?

The device supports a common-mode voltage up to 12 V.

Does the INA199B1QDCKRQ1 support bidirectional current sensing?

Yes, it is designed for bidirectional current sensing applications.

What is the fixed gain of the INA199B1QDCKRQ1?

The fixed gain is 50 V/V.