INA296B3QDGKRQ1

Overview

The INA296B3QDGKRQ1 is an ultra-precise, bidirectional current sense amplifier from Texas Instruments. It features a wide common-mode voltage range of -5V to 110V and operates on a single supply of 2.7V to 20V. The device provides a fixed gain of 50V/V with a small signal bandwidth of 1.1MHz and a slew rate of 8V/µs. It meets AEC-Q100 Grade 1 standards for automotive applications, operating within a temperature range of -40°C to +125°C. Key electrical characteristics include a maximum gain error of ±0.1%, a typical CMRR of 130dB, and a maximum input offset voltage of ±150µV.

Feature Summary

• Bidirectional operation supporting high-side, low-side, and inline current sensing configurations
• Ultra-precise zero-drift architecture ensuring stable measurements across wide temperature ranges
• High-speed response with 1.1MHz bandwidth and fast settling time for transient detection
• Wide common-mode voltage tolerance independent of the power supply voltage

Applications

• DC/DC converter current monitoring
• Battery management systems (BMS)
• Fuel cell control units
• Smart junction boxes

Procurement Notes

Verify the specific suffix QDGKRQ1 corresponds to the VSSOP-8 package and reel packaging configuration. Confirm that the B-grade accuracy specifications align with system requirements, as they differ from the A-grade variants. Ensure the ordering part number matches the exact gain and qualification level needed for the target automotive application.

Selection Notes

Select this component when a fixed 50V/V gain is required for optimal dynamic range with standard shunt resistors. The B-grade version offers higher gain error limits compared to the A-grade but maintains robust performance. Consider the VSSOP-8 package for space-constrained PCB layouts while ensuring adequate thermal dissipation for the intended operating conditions.

Part Context

This device belongs to the INA296x-Q1 family of ultra-precise current sense amplifiers designed for automotive environments. It complements other gain options like 10V/V or 200V/V within the same series, allowing designers to balance sensitivity and output swing. The Q1 designation indicates compliance with automotive reliability standards, distinguishing it from commercial grade counterparts.

Replacement Considerations

INA296A3QDGKRQ1 offers tighter precision specifications including lower offset voltage and gain error.