INA199C1QDCKRQ1

Current Regulation/Management Overview

The INA199C1QDCKRQ1 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 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 µV, input bias current of 28 µA, and quiescent current of 65 µA. It operates over a temperature range of -40°C to +125°C and is housed in a SC-70-6 package.

Current Regulation/Management Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards
• Bidirectional current sensing capability for flexible system integration
• High precision measurement with low input offset voltage and high CMRR

Current Regulation/Management Applications

• Battery management systems in electric vehicles
• Motor control circuits requiring precise current feedback
• Charging station power monitoring and protection

Current Regulation/Management Procurement Notes

Verify the specific suffix QDCKRQ1 to confirm AEC-Q100 automotive qualification and tape-and-reel packaging format. Ensure the C1 grade accuracy meets the design requirements. Cross-reference the manufacturer part number against official TI distribution channels to avoid counterfeit components. Confirm moisture sensitivity level handling procedures during assembly.

Current Regulation/Management Selection Notes

Select this component when automotive certification is mandatory and bidirectional sensing is required. The fixed 50 V/V gain simplifies design by eliminating external resistors. Consider the 12 V common-mode limit; if higher voltages are present, verify compatibility or select alternative models like the INA199C2 variant which supports up to 26 V common-mode voltage.

Current Regulation/Management Part Context

This device belongs to the INA199 series of zero-drift current sense amplifiers. It shares architectural similarities with other members like the INA199B1QDCKRQ1 but differs in accuracy grades and specific electrical tolerances. The series is characterized by low static power consumption and small footprint suitability for dense PCB layouts.

Current Regulation/Management Replacement Considerations

The INA199B1QDCKRQ1 serves as a functional substitute within the same family, offering similar specifications with potentially different accuracy grades. Verify pinout compatibility and thermal performance before substitution.