INA296B4QDRQ1

Overview

The INA296B4QDRQ1 is a bidirectional current sense amplifier from the Texas Instruments INA296x-Q1 family, designed for high-precision measurements in automotive and industrial environments. It features a wide common-mode voltage range of -5V to 110V, independent of the supply voltage. The device operates on a single supply between 2.7V and 20V with a quiescent current of 2.5mA. Key electrical parameters include a gain of 100V/V, a bandwidth of 1.1MHz, and a slew rate of 8V/µs. It meets AEC-Q100 Grade 1 standards for operation from -40°C to +125°C.

Feature Summary

• Bidirectional operation enables accurate measurement of both positive and negative current flows across shunt resistors.
• Ultra-wide common-mode input range supports high-side, low-side, and inline sensing configurations without supply voltage limitations.
• High-speed response with 1.1MHz bandwidth and fast settling time facilitates rapid transient detection and overcurrent protection.
• Precision zero-drift architecture ensures low offset voltage and minimal drift over the full operating temperature range.

Applications

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

Procurement Notes

Verify the specific suffix 'QDRQ1' corresponds to the SOIC-8 package and tape-and-reel shipping configuration. Confirm that the B-grade accuracy specifications align with system requirements, as they differ from the A-grade variants. Ensure the design accounts for the specified thermal resistance values for the selected package to maintain reliability within the -40°C to +125°C operating range.

Selection Notes

Select this component when bidirectional current sensing is required with a fixed gain of 100V/V. The B-grade version offers higher gain error tolerance compared to the A-grade variant; verify if this meets precision needs. Consider the 1.1MHz bandwidth for applications requiring fast fault detection. Ensure the supply voltage remains within 2.7V to 20V while accommodating the -5V to 110V common-mode input range.

Part Context

This part belongs to the INA296x-Q1 series of ultra-precise, bidirectional current sense amplifiers qualified for automotive applications. The series includes multiple gain options ranging from 10V/V to 200V/V. The 'B' designation indicates the B-grade accuracy tier, which has different offset and gain error specifications compared to the A-grade devices. All variants share the same high-speed performance and wide common-mode voltage capabilities.

Replacement Considerations

INA296A4QDRQ1: Offers higher precision with lower offset voltage and gain error but may have different cost implications.

FAQ

What is the maximum common-mode voltage supported by the INA296B4QDRQ1?

The device supports an operational common-mode voltage range from -5V to 110V.

Does the INA296B4QDRQ1 support bidirectional current sensing?

Yes, it is a bidirectional amplifier capable of measuring voltage drops across shunt resistors for both positive and negative current directions.