Texas Instruments INA296B2QDGKRQ1

Overview

INA296B2QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 ultra-precise bidirectional current sense amplifier for automotive high-side/low-side shunt monitoring, featuring 20V/V fixed gain, −5V to 110V common-mode input range, 1.1MHz bandwidth, 8V/µs slew rate, and ±150µV max input offset voltage over −40°C to 125°C.

For engineers reviewing the INA296B2QDGKRQ1 datasheet, INA296B2QDGKRQ1 pinout, INA296B2QDGKRQ1 application, or INA296B2QDGKRQ1 equivalent, this page delivers verified functional safety-capable specifications, package-specific terminal roles, real-world BMS and DC/DC converter use cases, and validated alternative part comparisons with technical and application-level distinctions.

Technical Context

The INA296B2QDGKRQ1 employs a zero-drift precision topology enabling stable bidirectional current measurement across −5V to 110V common-mode voltages independent of its 2.7V–20V supply. Its 20V/V gain version delivers ±0.1% max gain error and ±5ppm/°C drift, optimized for fast transient detection in safety-critical systems.

It integrates dual reference inputs (REF1/REF2) to configure unidirectional or bidirectional output swing, supports 1.1MHz small-signal bandwidth at all gains, and achieves 1µs settling time to 1% with 166dB typical CMRR-critical for noise-immune operation in 48V/12V automotive power domains.

Key Specifications

Pinout & Package

DGK package: 8-pin VSSOP (3mm × 4.9mm), thermally enhanced for automotive under-hood environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A2QDRQ1 and MAX40056ATA+T, the INA296B2QDGKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, −5V to 110V common-mode operation, and 1.1MHz bandwidth-enabling robust, single-chip current sensing across full automotive voltage domains and safety-critical timing windows.

Availability

INA296B2QDGKRQ1 is available at Aetrix Electronics and suitable for automotive battery management systems (BMS), 48V mild hybrid DC/DC converters, and electric power steering (EPS) motor control requiring stable component supply across extended temperature and voltage ranges.

Supply support for INA296B2QDGKRQ1 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 leader delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.

The INA296x-Q1 product line is designed for ultra-precise, high-voltage, bidirectional current sensing in AEC-Q100-compliant automotive subsystems-including BMS, junction boxes, and traction inverters-where accuracy, speed, and reliability are non-negotiable.

FAQ

What is the maximum common-mode voltage the INA296B2QDGKRQ1 can withstand during normal operation?

The INA296B2QDGKRQ1 operates over a common-mode input range of −5V to 110V under recommended conditions. Its survival rating extends to −20V to 120V, allowing tolerance of transient overvoltage events such as load dump without damage. This enables reliable high-side sensing on 48V and 60V automotive buses where rail voltage exceeds the device's 2.7V–20V supply range.

Does the INA296B2QDGKRQ1 support bidirectional current measurement out of the box?

Yes, the INA296B2QDGKRQ1 natively supports bidirectional current sensing. By applying appropriate reference voltages to REF1 and REF2 (e.g., both tied to VS/2), the output swings symmetrically above and below the reference level-enabling positive and negative current detection using a single shunt resistor and one amplifier. No external circuitry or mode configuration is required.

What is the guaranteed input offset voltage specification for the INA296B2QDGKRQ1 over temperature?

The INA296B2QDGKRQ1 guarantees a maximum input offset voltage of ±150µV over the full operating temperature range of −40°C to +125°C. Its offset drift is specified at ±0.5µV/°C max, resulting in ≤±75µV additional drift across the 165°C span-critical for maintaining accuracy in under-hood automotive environments.

Which package does the INA296B2QDGKRQ1 use, and what are its thermal characteristics?

The INA296B2QDGKRQ1 uses the DGK package: an 8-pin VSSOP (3mm × 4.9mm) with exposed thermal pad. Its junction-to-ambient thermal resistance (RθJA) is 167.2°C/W, and junction-to-board (RθJB) is 88.9°C/W. These values support continuous operation at up to 125°C ambient when mounted on 2oz copper with two thermal vias-validated for engine compartment placement.

How does the INA296B2QDGKRQ1 differ from the INA296A2QDGKRQ1 in terms of precision performance?

The INA296B2QDGKRQ1 offers ±0.1% max gain error and ±150µV max input offset voltage, targeting cost-optimized automotive applications where Grade 1 temperature range suffices. In contrast, the INA296A2QDGKRQ1 provides ±0.01% max gain error and ±10µV max offset-designed for premium ADAS or traction inverter subsystems demanding highest metrological fidelity at higher unit cost.