Texas Instruments INA296B5QDGKRQ1

Overview

INA296B5QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, bidirectional current sense amplifier with 200V/V fixed gain, −5V to 110V common-mode input range, 1.1MHz bandwidth, and ±150µV max input offset voltage. It enables high-accuracy shunt-based current monitoring in high-voltage battery management systems and DC/DC converters.

For engineers reviewing the INA296B5QDGKRQ1 datasheet, INA296B5QDGKRQ1 pinout, INA296B5QDGKRQ1 application, or INA296B5QDGKRQ1 equivalent, key selection criteria include its 200V/V gain accuracy (±0.1% max), 1µs 1% settling time, 166dB CMRR, −40°C to 125°C operation, and SOT-23-8 package compatibility with space-constrained automotive power rails.

Technical Context

The INA296B5QDGKRQ1 uses a zero-drift, precision topology optimized for bidirectional sensing across wide common-mode voltages independent of supply. Its multistage architecture delivers consistent 1.1MHz bandwidth and 8V/µs slew rate at 200V/V gain-enabling fast overcurrent detection in 48V and 12V automotive subsystems.

It features dual reference inputs (REF1/REF2) that configure output offset for unidirectional or bidirectional operation without external components, while maintaining ±100nV/°C offset drift and 35µA input bias current across −20V to 120V survival range.

Key Specifications

Pinout & Package

INA296B5QDGKRQ1 is packaged in an 8-pin SOT-23 (DDF) measuring 2.9mm × 2.8mm, optimized for high-density automotive PCB layouts with thermal pad exposure.

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, the INA296B5QDGKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 110V common-mode range, and 1.1MHz bandwidth in SOT-23-8-making it the only option for space-constrained, high-voltage automotive current sensing with fast fault response.

Availability

INA296B5QDGKRQ1 is available at Aetrix Electronics and suitable for battery management systems, DC/DC converters, and smart junction boxes requiring stable component supply across automotive production lifecycles.

Supply support for INA296B5QDGKRQ1 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 specializing in analog and embedded processing technologies, with leadership in automotive-grade signal conditioning and power management ICs.

The INA296x-Q1 product line was designed specifically for high-precision, high-voltage bidirectional current sensing in automotive electrification systems-including 48V mild hybrids, EV battery packs, and fuel cell control units.

FAQ

What is the maximum common-mode voltage the INA296B5QDGKRQ1 can withstand during normal operation?

The INA296B5QDGKRQ1 operates with a guaranteed common-mode input range of −5V to 110V under recommended conditions. This allows direct high-side sensing on 48V and 60V battery rails without level shifting. Its survival rating extends to −20V to 120V, supporting robustness against load-dump transients. The device maintains specified performance across this full operational range when powered from 2.7V to 20V.

Does the INA296B5QDGKRQ1 support bidirectional current sensing, and how is direction determined?

Yes, the INA296B5QDGKRQ1 supports true bidirectional current sensing. Direction is determined by the polarity of its differential input voltage (V_IN+ − V_IN−). When configured with REF1 = REF2 = V_S/2, the output centers at V_S/2: voltages above indicate current flow in one direction, below indicate the opposite. This eliminates need for external circuitry to interpret current direction in applications like regenerative braking or bidirectional DC/DC converters.

What is the gain error specification for the INA296B5QDGKRQ1, and how does it vary with temperature?

The INA296B5QDGKRQ1 has a maximum gain error of ±0.1% at room temperature, with a drift of ±5ppm/°C over −40°C to +125°C. This translates to ±0.0005% error per °C, resulting in ≤±0.06% total gain error across the full automotive temperature range. This stability ensures consistent current scaling in BMS and power converter feedback loops without software calibration.

Can the INA296B5QDGKRQ1 be used with a 3.3V supply, and what is its output swing limitation?

Yes, the INA296B5QDGKRQ1 operates from 2.7V to 20V, making 3.3V fully compatible. With a 3.3V supply, its output swings from ≥8mV above GND to ≤3.1V (within 200mV of V_S) under 10kΩ load. This provides >3V output dynamic range-sufficient for direct interfacing with 12-bit ADCs in automotive microcontrollers without additional buffering.

How does the SOT-23-8 package of the INA296B5QDGKRQ1 impact thermal performance in high-power automotive applications?

The SOT-23-8 (DDF) package of the INA296B5QDGKRQ1 has a junction-to-ambient thermal resistance (R_θJA) of 129.7°C/W. At 2.5mA quiescent current and typical 5V supply, power dissipation remains <13mW-generating negligible self-heating (<1.7°C rise). Its compact size fits dense power module layouts while maintaining accuracy; thermal derating is unnecessary below 105°C board temperature.