INA296A1QDGKRQ1

Overview

The INA296A1QDGKRQ1 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 10V/V and operates on a single supply voltage ranging from 2.7V to 20V. It draws a typical quiescent current of 2.5mA. Key electrical characteristics include a maximum input offset voltage of ±5µV, a maximum gain error of ±0.01%, and a typical DC CMRR of 166dB. The amplifier provides a small signal bandwidth of 1.1MHz and a slew rate of 8V/µs.

Feature Summary

• Ultra-precise bidirectional operation with high accuracy for low VSENSE measurements
• Wide common-mode voltage range extending beyond 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

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

Procurement Notes

Verify the specific package variant DGK (VSSOP-8) matches the design footprint. Confirm AEC-Q100 Grade 1 qualification requirements for automotive environments. Ensure reference pin configurations align with unidirectional or bidirectional system needs. Validate thermal performance within the specified operating temperature range.

Selection Notes

Select this component when a fixed 10V/V gain is required for high-side, inline, or low-side sensing. Choose based on the need for precision in low ohmic shunt applications where minimizing power loss is critical. Consider the wide common-mode range compatibility with high-voltage bus architectures.

Part Context

This part belongs to the INA296x-Q1 family of ultra-precise current sense amplifiers designed for automotive and industrial applications. It shares architectural similarities with other gains in the series but is distinct due to its specific 10V/V fixed gain configuration. The Q1 suffix indicates AEC-Q100 qualification for automotive use.

Replacement Considerations

INA296A1-Q1

FAQ

How does the input bias current behave across the common-mode voltage range?

The input bias current remains constant at approximately 35µA across the entire common-mode voltage range from -5V to 110V.

What is the maximum gain error specification for this device?

The maximum gain error is ±0.01% at room temperature, with a drift of ±1ppm/°C over the full temperature range.