INA296B3QDRQ1

Overview

The INA296B3QDRQ1 is a bidirectional current-sense amplifier from Texas Instruments, designed for high-precision measurements in automotive and industrial environments. It operates with a common-mode voltage range of -5 V to 110 V and supports a supply voltage between 2.7 V and 20 V. The device features a fixed gain of 50 V/V, a bandwidth of 1.1 MHz, and a typical CMRR of 150 dB. It meets AEC-Q100 standards for automotive applications, ensuring reliability under harsh conditions.

Feature Summary

• Bidirectional current sensing capability supporting both positive and negative current flow detection
• High common-mode voltage tolerance allowing operation across wide voltage ranges without external level shifting
• Automotive qualification compliant with AEC-Q100 standards for long-term reliability
• Ultra-low input offset voltage and drift characteristics enabling precise measurement accuracy

Applications

• Automotive battery management systems requiring accurate state-of-charge monitoring
• Motor control circuits needing fast transient response and overcurrent protection
• Industrial power supplies utilizing high-side current sensing for load regulation
• Inverter and converter topologies demanding isolation from high common-mode voltages

Procurement Notes

Verify the specific suffix 'QDRQ1' confirms the automotive grade (AEC-Q100) and SOIC-8 package configuration. Ensure compatibility with your system's thermal requirements and PCB layout constraints. Confirm that the 50 V/V gain aligns with your ADC input range and expected current levels. Check for any recent lifecycle notices or obsolescence warnings directly from Texas Instruments before finalizing procurement plans.

Selection Notes

Select this component when high precision and automotive reliability are required for bidirectional current monitoring. The 50 V/V gain offers a balance between signal amplification and dynamic range. Consider the 1.1 MHz bandwidth for applications involving fast switching events. Evaluate the SOIC-8 package size against available board space. Compare against other gains if higher resolution or wider dynamic range is needed for specific load conditions.

Part Context

This part belongs to the INA296x family of ultra-precise bidirectional current-sense amplifiers. The 'B' variant indicates specific gain error and offset voltage specifications distinct from the 'A' series. The 'Q1' suffix denotes automotive qualification, while 'DRQ1' specifies the tape-and-reel packaging in an SOIC-8 footprint. This family is engineered for applications demanding minimal signal distortion across wide temperature ranges.

Replacement Considerations

Direct substitutes within the same family include INA296A3QDRQ1 for tighter precision specs or INA296B4QDRQ1 for different gain configurations. Verify pinout compatibility and thermal performance when swapping variants. Ensure the replacement maintains the required AEC-Q100 qualification status for automotive safety compliance.