Texas Instruments INA296A5QDDFRQ1

Overview

INA296A5QDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 ultra-precise bidirectional current sense amplifier for automotive high-side/low-side shunt monitoring, featuring 200V/V fixed gain, −5V to 110V common-mode input range, 1.1MHz bandwidth, 8V/µs slew rate, and ±10µV max input offset voltage. It enables fast overcurrent detection in 48V/12V DC/DC converters and battery management systems.

For engineers reviewing the INA296A5QDDFRQ1 datasheet, INA296A5QDDFRQ1 pinout, INA296A5QDDFRQ1 application, or INA296A5QDDFRQ1 equivalent, key selection criteria include bidirectional sensing capability, ±0.015% max gain error at 200V/V, 166dB CMRR, survival up to −20V/120V, and SOT23-8 package compatibility with automotive thermal requirements (−40°C to 125°C).

Technical Context

The INA296A5QDDFRQ1 uses a zero-drift precision topology to maintain ±2µV typical input offset and ±100nV/°C drift across −40°C to 125°C, enabling accurate low-V_SENSE measurement down to millivolt levels. Its multistage architecture delivers consistent 1.1MHz bandwidth and 1µs 1% settling time regardless of gain setting.

It supports configurable unidirectional or bidirectional output via dual reference pins (REF1/REF2), allowing rail-to-rail output alignment from GND+8mV to V_S−0.2V with 2.7V–20V supply. Input bias current remains constant at 35µA (typ) across the full −20V to 120V survival common-mode range.

Key Specifications

Pinout & Package

INA296A5QDDFRQ1 is packaged in an 8-pin SOT-23 (DDF) measuring 2.9mm × 2.8mm, optimized for space-constrained automotive modules and thermally efficient PCB layout with exposed pad option.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current sense amplifier applications.

Compared with INA240A5QDRQ1 and MAX40056ATA+T, INA296A5QDDFRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 110V common-mode operation, ±10µV offset, and dual-reference bidirectional capability in a single SOT23-8 package-making it the only option for precision, safety-compliant, high-voltage automotive current sensing.

Availability

INA296A5QDDFRQ1 is available at Aetrix Electronics and suitable for automotive DC/DC converters, battery management systems, and smart junction boxes requiring stable component supply across extended temperature and long product lifecycles.

Supply support for INA296A5QDDFRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions for automotive, industrial, personal electronics, and communications markets.

The INA296x-Q1 product line was designed specifically for AEC-Q100-compliant, ultra-precise bidirectional current sensing in next-generation 12V/48V/60V automotive power systems-including EV traction inverters, fuel cell controls, and intelligent power distribution units.

FAQ

What is the maximum common-mode voltage the INA296A5QDDFRQ1 can withstand during normal operation?

The INA296A5QDDFRQ1 operates over a common-mode input range of −5V to 110V. This allows direct high-side sensing on 48V or 60V automotive buses without external level-shifting. Its survival rating extends to −20V to 120V, protecting against load dump and jump-start transients. The device maintains specified performance across this full operational range, making INA296A5QDDFRQ1 ideal for robust automotive current monitoring.

How does the INA296A5QDDFRQ1 achieve bidirectional current sensing without external components?

The INA296A5QDDFRQ1 achieves true bidirectional sensing using its dual reference inputs (REF1 and REF2). By setting REF1 = V_S and REF2 = GND-or vice versa-the output center point shifts to V_S/2, enabling positive and negative output swings relative to that midpoint. This eliminates the need for external op-amps or level-shifters. The internal precision divider ensures ±0.01% reference accuracy, preserving measurement integrity in INA296A5QDDFRQ1-based designs.

What is the gain error specification for the INA296A5QDDFRQ1, and how does it impact system accuracy?

The INA296A5QDDFRQ1 has a maximum gain error of ±0.015% at room temperature and ±2ppm/°C drift over −40°C to +125°C. At 200V/V gain, this translates to <300µV error on a 2V full-scale output-critical for high-resolution ADC interfacing. Combined with ±10µV offset, total unadjusted error stays below 0.02% of reading, enabling Class 0.1 current measurement in automotive BMS and DC/DC applications using INA296A5QDDFRQ1.

Can the INA296A5QDDFRQ1 be used in low-side current sensing configurations?

Yes, the INA296A5QDDFRQ1 supports low-side, high-side, and inline current sensing. For low-side use, connect IN+ to the load side of the shunt and IN− to ground. Its −5V to 110V common-mode range accommodates ground-referenced shunts while rejecting noise from adjacent high-current traces. The device's 166dB CMRR and 35µA input bias current ensure minimal error even with PCB layout asymmetries-making INA296A5QDDFRQ1 equally effective in all three topologies.

What package type and thermal characteristics apply to the INA296A5QDDFRQ1?

The INA296A5QDDFRQ1 uses the DDF (SOT-23-8) package, measuring 2.9mm × 2.8mm with standard lead pitch. Its junction-to-ambient thermal resistance is 129.7°C/W, and junction-to-board is 52.6°C/W-enabling reliable operation at 125°C ambient with minimal copper area. The package is RoHS-compliant and qualified to AEC-Q100 Grade 1, ensuring mechanical and thermal robustness in automotive under-hood environments for INA296A5QDDFRQ1 deployments.