INA296A3IDGKR

Overview

The INA296A3IDGKR is a bidirectional current sense amplifier from Texas Instruments featuring a fixed gain of 50 V/V. It operates with a common-mode voltage range from -5V to 110V and supports a supply voltage between 2.7V and 20V. The device offers a small signal bandwidth of 1.1MHz, a slew rate of 8V/µs, and a typical CMRR of 166dB. Key electrical characteristics include a maximum offset voltage of ±3µV, a maximum gain error of ±0.01%, and an input bias current of 45µA. It functions within an ambient temperature range of -40°C to +125°C.

Feature Summary

• Ultra-precise bidirectional operation with high accuracy for low-voltage shunt measurements
• 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
• Low input bias current that remains constant across the entire common-mode range

Applications

• 48V DC/DC converters
• 48V battery management systems (BMS)
• Test and measurement equipment
• Macro remote radio units (RRU)
• 48V rack server power supplies

Procurement Notes

Verify the specific suffix IDGKR corresponds to the VSSOP-8 package when sourcing. Confirm the A3 designation indicates the 50 V/V fixed gain variant. Ensure the component meets RoHS compliance requirements for your assembly process. Check datasheet specifications for moisture sensitivity level handling during soldering. Validate that the operating conditions align with the recommended electrical parameters.

Selection Notes

Select this part for applications requiring precise bidirectional current monitoring in high common-mode voltage environments. The 50 V/V gain is suitable for optimizing output dynamic range with specific shunt resistor values. Consider the 1.1MHz bandwidth for fast overcurrent protection circuits. Evaluate the low offset voltage for accurate measurements at low differential input signals. Ensure the system supply voltage falls within the 2.7V to 20V operational range.

Part Context

This component belongs to the INA296x family of ultra-precise current sense amplifiers. The series includes variants with gains ranging from 10 V/V to 200 V/V. The 'A' version denotes higher precision specifications compared to the 'B' version. The device utilizes a zero-drift topology to maintain accuracy over temperature variations. It is designed for both high-side and low-side sensing configurations.

Replacement Considerations

INA296A5IDGKR provides a 200 V/V gain option within the same package. INA296A1IDGKR offers a 10 V/V gain alternative. For automotive applications, consider the INA296A3QDRQ1 which holds AEC-Q100 qualification.