Texas Instruments INA296A5QDGKRQ1

Overview

INA296A5QDGKRQ1 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 offset voltage at −40°C to +125°C - deployed in battery management systems and 48V DC/DC converters.

For engineers reviewing the INA296A5QDGKRQ1 datasheet, INA296A5QDGKRQ1 pinout, INA296A5QDGKRQ1 application, or INA296A5QDGKRQ1 equivalent, key selection criteria include bidirectional sensing capability, 200V/V gain accuracy (±0.015% max), 166dB CMRR, survival voltage up to 120V, and functional safety documentation support for ASIL-B system integration.

Technical Context

The INA296A5QDGKRQ1 employs a zero-drift, precision topology enabling stable operation across −5V to 110V common-mode voltages independent of its 2.7V–20V supply rail. Its multistage architecture delivers consistent 1.1MHz bandwidth and 1µs 1% settling time at all gains, including 200V/V.

It uses dual reference inputs (REF1/REF2) to configure unidirectional or bidirectional output swing relative to VS or GND, while maintaining low input bias current (35µA typ.) constant over full VCM range - critical for low-leakage shunt measurement in high-voltage automotive subsystems.

Key Specifications

Pinout & Package

INA296A5QDGKRQ1 is packaged in an 8-pin VSSOP (DGK) measuring 3mm × 4.9mm, optimized for thermal performance (R_θJA = 167.2°C/W) and space-constrained automotive modules.

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 INA296A5QDGKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 166dB CMRR, ±10µV offset, and configurable bidirectional output - making it the only option qualified for ASIL-B BMS and EPS current sensing where precision, noise immunity, and functional safety coexist.

Availability

INA296A5QDGKRQ1 is available at Aetrix Electronics and suitable for battery management systems, electric power steering modules, and 48V mild hybrid DC/DC converters requiring stable component supply across extended automotive lifecycles.

Supply support for INA296A5QDGKRQ1 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 ASIL-B automotive subsystems - emphasizing zero-drift stability, wide common-mode tolerance, and functional safety readiness.

FAQ

What is the maximum common-mode voltage the INA296A5QDGKRQ1 can withstand during normal operation?

The INA296A5QDGKRQ1 operates continuously over a common-mode input range of −5V to 110V. This allows direct interface to 48V, 60V, and 72V automotive bus rails without external attenuation or level-shifting. Its survival rating extends to −20V to 120V, protecting against load dump and jump-start transients. The INA296A5QDGKRQ1 maintains specified performance across this full range when powered within its 2.7V–20V supply window.

Does the INA296A5QDGKRQ1 support bidirectional current sensing, and how is it configured?

Yes, the INA296A5QDGKRQ1 supports true bidirectional current sensing via its dual reference inputs (REF1 and REF2). Connecting both to VS/2 centers the output at mid-supply, enabling positive/negative V_SENSE to produce above/below-mid output voltages. This configuration is essential for battery charge/discharge monitoring in BMS. The INA296A5QDGKRQ1 requires no external components to enable this mode - only proper REF pin biasing per the datasheet's "Adjusting the Output With the Reference Pins" section.

What is the gain error specification for the INA296A5QDGKRQ1, and how does it vary with temperature?

The INA296A5QDGKRQ1 has a maximum gain error of ±0.015% at room temperature, with a drift of ±2 ppm/°C over −40°C to +125°C. This translates to ≤±0.025% total error across its full operating range - significantly tighter than standard current sense amplifiers. These values are validated per AEC-Q100 stress testing and are critical for applications like SoC estimation in EV batteries, where long-term gain stability directly impacts range prediction accuracy. The INA296A5QDGKRQ1 datasheet Table 6-5 provides full statistical distribution data.

Can the INA296A5QDGKRQ1 be used in high-frequency switching applications such as GaN-based DC/DC converters?

Yes, the INA296A5QDGKRQ1 is explicitly designed for high-speed current sensing in fast-switching power stages. Its 1.1MHz bandwidth, 8V/µs slew rate, and 1µs 1% settling time enable accurate capture of current waveforms in GaN and SiC converters operating up to 1MHz. Its 166dB CMRR rejects high-frequency common-mode noise from gate drivers, and its constant 35µA input bias current ensures stable operation even at 110V common-mode. The INA296A5QDGKRQ1's performance is verified in typical application circuits for 48V/12V bi-directional converters in the official TI reference design TIDA-01610.

Is the INA296A5QDGKRQ1 pin-compatible with other devices in the INA296x-Q1 family?

Yes, all 8-pin variants of the INA296x-Q1 family - including INA296A1QDGKRQ1 through INA296A5QDGKRQ1 and their INA296B counterparts - share identical pinout and package (DGK, DDF, D). This allows seamless gain optimization (10V/V to 200V/V) without PCB redesign. The INA296A5QDGKRQ1 uses the same VSSOP-8 footprint and electrical interface as INA296A4QDGKRQ1, enabling drop-in replacement when higher gain is needed for lower shunt values or improved SNR. No layout changes are required when upgrading within the 8-pin lineup.