Texas Instruments INA296A1QDGKRQ1

Overview

INA296A1QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) ultra-precise bidirectional current sense amplifier with 10V/V fixed gain, −5V to 110V common-mode input range, 1.1MHz bandwidth, and ±10µV max input offset voltage. It enables high-accuracy shunt-based current monitoring in automotive high-side, low-side, or inline configurations - such as in 48V DC/DC converters requiring fast overcurrent detection.

For engineers reviewing the INA296A1QDGKRQ1 datasheet, INA296A1QDGKRQ1 pinout, INA296A1QDGKRQ1 application, or INA296A1QDGKRQ1 equivalent, key selection criteria include its guaranteed ±0.01% gain error, 166dB CMRR, 1µs 1% settling time, and SOT23-8 package compatibility with space-constrained automotive power modules.

Technical Context

The INA296A1QDGKRQ1 employs a zero-drift, precision topology that maintains ±10µV max offset and ±0.01% max gain error across −40°C to 125°C, enabling accurate low-V_SENSE measurement down to millivolt levels. Its input bias current remains constant at 35µA (typ) across the full −5V to 110V common-mode range - independent of V_CM - unlike conventional high-voltage amplifiers.

It delivers 8V/µs slew rate and 1.1MHz small-signal bandwidth at all gains, supporting transient detection and fast overcurrent protection in automotive BMS and smart junction boxes. The dual reference inputs (REF1/REF2) allow flexible output centering for bidirectional sensing without external level-shifting circuitry.

Key Specifications

Pinout & Package

INA296A1QDGKRQ1 is packaged in an 8-pin SOT-23 (DDF) package measuring 2.9mm × 2.8mm, optimized for high-density automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1QDRQ1 and MAX40056ATA+T, the INA296A1QDGKRQ1 delivers superior precision (±0.01% vs ±0.1%), faster transient response (1.1MHz vs 400kHz), and full AEC-Q100 Grade 1 qualification - making it the optimal choice for safety-critical, high-performance automotive current sensing where measurement fidelity directly impacts system safety and efficiency.

Availability

INA296A1QDGKRQ1 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 product lifecycles.

Supply support for INA296A1QDGKRQ1 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 specializing in analog and embedded processing technologies, with deep expertise in automotive-grade signal conditioning and power management ICs.

The INA296x-Q1 product line was designed specifically for high-accuracy, high-speed current sensing in AEC-Q100-compliant automotive power systems - including 48V mild-hybrid architectures, electric power steering, and battery disconnect units.

FAQ

What is the maximum common-mode voltage the INA296A1QDGKRQ1 can withstand during normal operation?

The INA296A1QDGKRQ1 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 overvoltages such as load dump in automotive 12V/48V systems without damage. This specification is validated per AEC-Q100 stress testing protocols.

Does the INA296A1QDGKRQ1 require external calibration to achieve its ±0.01% gain accuracy?

No, the INA296A1QDGKRQ1 achieves ±0.01% maximum gain error and ±1ppm/°C drift without external calibration. Its zero-drift architecture and factory-trimmed precision resistors ensure this accuracy is guaranteed over −40°C to +125°C, eliminating the need for system-level gain compensation in automotive applications.

Can the INA296A1QDGKRQ1 be used for bidirectional current sensing in a 48V battery system?

Yes, the INA296A1QDGKRQ1 supports true bidirectional sensing via its dual reference inputs (REF1 and REF2). When configured with REF1 = VS and REF2 = GND (or vice versa), the output centers at VS/2, enabling symmetric positive/negative current representation - essential for regenerative braking current monitoring in 48V battery systems.

What package type is used for the INA296A1QDGKRQ1, and what are its board-level implications?

The INA296A1QDGKRQ1 uses the DDF (SOT-23-8) package, measuring 2.9mm × 2.8mm. Its small footprint and thermal resistance (R_θJA = 129.7°C/W) support high-density placement near power stages in automotive ECUs, while the exposed pad variant (not used here) is available for enhanced thermal performance in thermally constrained designs.

How does the INA296A1QDGKRQ1 maintain low input bias current across its full common-mode range?

The INA296A1QDGKRQ1 uses a proprietary input stage architecture that decouples bias current from common-mode voltage. Unlike conventional amplifiers where I_B rises linearly with V_CM, it maintains a constant 35µA (typ) per input across −5V to 110V - critical for minimizing measurement error in high-impedance shunt networks used in low-power automotive subsystems.