INA296B1QDRQ1

Overview

The INA296B1QDRQ1 is an AEC-Q100 qualified bidirectional current-sense amplifier from Texas Instruments. It operates with a common-mode voltage range of -5 V to 110 V and supports a supply voltage between 2.7 V and 20 V. The device features a fixed gain of 10 V/V, a bandwidth of 1.1 MHz, and a typical CMRR of 166 dB. Key electrical parameters include a maximum gain error of 0.1%, an input bias current of 45 uA, and a quiescent current of 2.5 mA. It is housed in an SOIC-8 package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Supports bidirectional current measurement across a wide -5 V to 110 V common-mode voltage range.
• Delivers high precision with low gain error and high common-mode rejection ratio for accurate sensing.
• Provides fast transient response with a 1.1 MHz bandwidth and rapid settling time suitable for overcurrent protection.

Applications

• Automotive battery management systems requiring precise current monitoring.
• High-side current sensing in industrial motor control applications.
• Overcurrent protection circuits in automotive power distribution units.

Procurement Notes

Verify the specific suffix QDRQ1 confirms AEC-Q100 automotive qualification and SOIC-8 packaging. Ensure the B-grade accuracy specifications align with system requirements. Confirm moisture sensitivity levels and reflow soldering profiles match assembly capabilities. Cross-reference the manufacturer datasheet for exact pinout and thermal characteristics before finalizing procurement.

Selection Notes

Select this component when a fixed 10 V/V gain is optimal for the shunt resistor value and ADC input range. The B-grade accuracy offers a balance between cost and performance for general automotive sensing. Consider the SOIC-8 package for standard surface-mount assembly processes. Evaluate the 1.1 MHz bandwidth against noise filtering needs in the target application environment.

Part Context

This part belongs to the INA296x-Q1 family of ultra-precise, bidirectional current-sense amplifiers designed for automotive environments. The series provides multiple gain options and packages to accommodate various high-voltage sensing requirements while maintaining high common-mode rejection and low offset voltages across the operating temperature range.

Replacement Considerations

Direct substitutes within the same family include INA296A1QDRQ1 for higher precision or other gain variants like INA296B2QDRQ1 if different amplification is needed. Verify that any alternative maintains the -5 V to 110 V common-mode range and SOIC-8 footprint for pin-to-pin compatibility.