INA296A4QDRQ1

Overview

The INA296A4QDRQ1 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 voltage between 2.7V and 20V. The device provides a fixed gain of 100V/V with a small signal bandwidth of 1.1MHz at all gains. Key electrical characteristics include a maximum input offset voltage of ±3µV, a typical CMRR of 166dB, and a maximum gain error of ±0.003%. It draws 2.5mA of quiescent current and is specified for operation over a temperature range of -40°C to +125°C.

Feature Summary

• Ultra-precise bidirectional measurement capability with low offset voltage and high DC CMRR
• Wide common-mode voltage range independent of the power supply voltage
• High-speed response with 1.1MHz bandwidth and fast settling time for transient detection

Applications

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

Procurement Notes

Verify the specific package variant matches the design requirements, as the QDR suffix indicates an SOIC-8 package. Confirm that the AEC-Q100 Grade 1 qualification meets the thermal specifications for the target automotive application environment. Ensure the selected gain option aligns with the required output dynamic range and shunt resistor values.

Selection Notes

Select this component when high precision and wide common-mode voltage are required in automotive environments. The 100V/V gain is suitable for applications requiring significant signal amplification from small differential voltages. Consider the 1.1MHz bandwidth for fast overcurrent protection circuits. Verify that the system supply voltage remains within the 2.7V to 20V operating range.

Part Context

This part belongs to the INA296x-Q1 family of ultra-precise current sense amplifiers designed for automotive applications. The 'A' designation indicates the highest accuracy grade with minimal drift, while the '4' specifies the 100V/V gain setting. The 'Q1' suffix denotes AEC-Q100 qualification for automotive use. It shares the same pinout and core architecture as other gain variants in the series.

Replacement Considerations

INA296A3QDRQ1 offers a 50V/V gain option. INA296A5QDRQ1 provides a 200V/V gain. For non-automotive applications, the INA296A4DR may be considered if AEC-Q100 qualification is not required.