INA199C3QDCKRQ1

Overview

The INA199C3QDCKRQ1 is an automotive-grade, bidirectional current sense amplifier from Texas Instruments. It features a wide common-mode voltage range of -0.3V to 26V and operates on a single supply voltage between 2.7V and 26V. The device provides a fixed gain of 200 V/V with a maximum gain error of 0.03%. Key electrical specifications include a bandwidth product of 14 kHz, a common-mode rejection ratio (CMRR) of 120 dB, and an input offset voltage of 5 µV. It consumes 65 µA of quiescent current and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments.
• Bidirectional measurement capability allows accurate sensing of current flow in both directions across the shunt resistor.
• Zero-drift architecture ensures high precision by minimizing input offset voltage and drift over temperature variations.

Applications

• High-side or low-side current monitoring in automotive battery management systems.
• Motor control applications requiring precise current feedback for protection and regulation.
• Charging station infrastructure for monitoring input and output currents.

Procurement Notes

Verify that the specific suffix QDCKRQ1 corresponds to the required automotive grade (AEC-Q100) and reel packaging configuration. Confirm that the fixed gain of 200 V/V aligns with the system's signal conditioning requirements. Ensure the -0.3V to 26V common-mode range covers the maximum bus voltage present in the target application circuit to prevent saturation or damage.

Selection Notes

Select this component when high accuracy is critical due to its zero-drift technology and low offset voltage. The 200 V/V gain is suitable for detecting small voltage drops across low-value shunt resistors. Consider the SC-70-6 package size if board space is constrained. Compare against other INA199 variants if different gain options or bandwidth characteristics are needed for specific noise filtering requirements.

Part Context

This part belongs to the INA199 family of current sense amplifiers designed for demanding industrial and automotive applications. The family offers various gain options and package types to suit different design constraints. The 'Q1' suffix indicates automotive qualification, while 'C3' typically denotes the specific gain setting within the series. These devices are engineered to provide robust performance in electric vehicles and powertrain systems.

Replacement Considerations

Compatible alternatives within the same family include INA199B3QDCKRQ1 and INA199C2QDCKRQ1. Verify that substitute parts match the required gain, accuracy class, and automotive qualification status before integration into the design.