INA296A3QDRQ1

Overview

The INA296A3QDRQ1 is a bidirectional, ultra-precise current-sense amplifier from Texas Instruments, designed for high-voltage applications. It features a wide common-mode voltage range of -5 V to +110 V, independent of supply voltage. The device offers a fixed gain of 50 V/V and supports single-supply operation between 2.7 V and 20 V. Key electrical specifications include a maximum input offset voltage of 3 µV, an input bias current of 45 µA, and a gain error of 0.002%. It provides a small-signal bandwidth of 1.1 MHz and operates within a temperature range of -40°C to +125°C. Packaged in an 8-pin SOIC, it meets AEC-Q100 automotive qualification standards.

Feature Summary

• Supports bidirectional current measurement with a wide common-mode voltage range extending from -5 V to +110 V.
• Delivers ultra-high precision with minimal gain error and low input offset voltage drift for accurate sensing.
• Provides fast transient response through a 1.1 MHz signal bandwidth and rapid settling time.
• Ensures robust performance in harsh environments with excellent common-mode rejection capabilities.

Applications

• High-voltage DC power distribution systems
• Fast overcurrent protection circuits
• Transient detection in industrial automation
• Automotive battery management systems

Procurement Notes

Verify the specific suffix 'A3' confirms the 50 V/V gain setting, as other variants exist within the INA296 family. Ensure the 'QDRQ1' designation matches the required automotive grade (AEC-Q100) and SOIC-8 package type. Confirm that the operating environment falls within the specified -40°C to +125°C range. Check for any specific moisture sensitivity level requirements during storage and handling. Validate that the system's common-mode voltage does not exceed the absolute maximum ratings.

Selection Notes

Select this component when precise bidirectional current monitoring is required in high-voltage environments up to 110 V. The 50 V/V gain is suitable for applications where the shunt voltage is moderate, requiring amplification to match ADC input ranges. Consider the 1.1 MHz bandwidth if fast fault detection is critical. Compare against lower-precision or unidirectional alternatives if cost or simplicity is prioritized over accuracy. Ensure the SOIC-8 footprint fits the PCB layout constraints.

Part Context

This part belongs to the INA296-Q1 series of super-precision, bidirectional current-sense amplifiers. The series is characterized by its ability to measure voltage drops across shunt resistors in high-side or low-side configurations with exceptional accuracy. The 'A' version denotes tighter tolerance specifications compared to standard grades. The Q1 suffix indicates compliance with automotive reliability standards, making it suitable for demanding vehicular electronics.

Replacement Considerations

Direct substitutes within the same family include INA296A4QDRQ1 (100 V/V gain) or INA296A2QDRQ1 (20 V/V gain), provided the gain adjustment is acceptable. Other INA296 variants may replace this part if the specific gain value is not critical to the design.

FAQ

What is the common-mode voltage range of the INA296A3QDRQ1?

The device supports a common-mode voltage range from -5 V to +110 V, which is independent of the supply voltage.

Is the INA296A3QDRQ1 qualified for automotive applications?

Yes, the INA296A3QDRQ1 is AEC-Q100 qualified, ensuring suitability for automotive electronic systems.

What is the fixed gain of the INA296A3QDRQ1?

The INA296A3QDRQ1 has a fixed gain of 50 V/V.