INA296A5QDGKRQ1

Overview

The INA296A5QDGKRQ1 is an ultra-precise, bidirectional current sense amplifier from Texas Instruments. It measures voltage drops across shunt resistors over a wide common-mode range of -5V to 110V, independent of the supply voltage. The device features a fixed gain of 200V/V and operates on a single supply voltage between 2.7V and 20V. It offers a small signal bandwidth of 1.1MHz at all gains with a slew rate of 8V/µs. Key electrical characteristics include a maximum offset voltage of ±2µV, a maximum gain error of ±0.003%, and a typical CMRR of 166dB. It is qualified for automotive applications under AEC-Q100 standards.

Feature Summary

• Ultra-precise bidirectional operation with high accuracy metrics including low offset voltage and minimal gain error drift.
• Wide common-mode input range extending from -5V to 110V, allowing use in high-side, low-side, and inline configurations beyond the supply voltage.
• High-speed performance with a 1.1MHz bandwidth and fast settling time suitable for transient detection and overcurrent protection.
• Low input bias current that remains constant across the entire common-mode voltage range.

Applications

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

Procurement Notes

Verify the specific suffix DGKR indicates the VSSOP-8 package and tape-and-reel packaging configuration. Confirm the A5 designation corresponds to the 200V/V gain option. Ensure the Q1 suffix aligns with the required AEC-Q100 Grade 1 qualification for the target automotive temperature range. Cross-reference the manufacturer part number against official TI documentation to validate functional safety capabilities if applicable.

Selection Notes

Select this component when a high gain of 200V/V is required to amplify small differential signals from low-ohmic shunts. The wide common-mode range supports high-voltage bus monitoring independent of the logic supply. The bidirectional capability allows for measuring both charging and discharging currents. Consider the thermal resistance and power dissipation within the VSSOP-8 package for the specific PCB layout.

Part Context

This device belongs to the INA296x-Q1 family of ultra-precise current sense amplifiers designed for automotive and industrial applications. The family provides multiple gain options ranging from 10V/V to 200V/V. The 'A' version denotes higher precision specifications compared to the 'B' version. The 'Q1' suffix indicates automotive qualification, while 'DGK' specifies the 8-pin VSSOP package.

Replacement Considerations

INA296A5QDRQ1: Same gain and precision but in SOIC-8 package. INA296A5DDFRQ1: Same gain and precision but in SOT-23-8 package. INA296B5QDGKRQ1: Lower precision specifications with same gain and package.