INA296B3QDGSRQ1

Overview

The INA296B3QDGSRQ1 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. Key electrical parameters include an input offset voltage of 3 µV, input bias current of 45 µA, and a maximum gain error of 0.003%. It functions within a temperature range of -40°C to +125°C and meets AEC-Q100 standards.

Feature Summary

• Supports bidirectional current sensing across a wide common-mode voltage range of -5 V to 110 V
• Delivers ultra-precise measurement capabilities with low input offset voltage and minimal gain error
• Provides high-speed signal processing with a 1.1 MHz bandwidth for fast transient detection
• Complies with AEC-Q100 automotive qualification standards for reliability

Applications

• Automotive battery management systems
• High-side or low-side current monitoring in electric vehicles
• Industrial motor control and protection circuits
• Overcurrent protection in high-voltage DC distribution networks

Procurement Notes

Verify the specific suffix QDGSRQ1 corresponds to the VSSOP-8 package and tape-and-reel orientation required for your assembly process. Confirm that the B-grade accuracy specifications align with your system's tolerance requirements. Ensure compatibility with your PCB footprint for the 8-pin small-outline package. Check for any recent product change notices regarding manufacturing sites or materials.

Selection Notes

Select this component when precise bidirectional current measurement is required in high-common-mode voltage environments. The B-grade variant offers higher gain error tolerance compared to the A-grade series, making it suitable for applications where extreme precision is less critical than cost efficiency. The 50 V/V gain provides a balanced output swing for standard ADC interfaces. Consider the thermal performance and power dissipation characteristics under continuous load conditions.

Part Context

This part belongs to the INA296x-Q1 family of ultra-precise, bidirectional current-sense amplifiers. The 'B' designation indicates a specific accuracy grade with defined limits on gain error and offset voltage drift. The 'DGSR' suffix denotes the VSSOP-8 package type and reel packaging. This series is engineered for robust performance in harsh automotive and industrial settings requiring high common-mode rejection and fast response times.

Replacement Considerations

Direct substitutes within the same family include INA296A3QDGSRQ1 for higher precision or INA296B4QDGSRQ1 for different gain settings. Verify pinout compatibility and thermal characteristics when replacing with non-TI alternatives. Ensure the replacement device meets the same AEC-Q100 qualification level and operates within the specified -5 V to 110 V common-mode range.