Texas Instruments INA290A4QDCKRQ1

Overview

INA290A4QDCKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) ultra-precise current sense amplifier optimized for high-side sensing in automotive power systems. It delivers 200 V/V fixed gain, ±12 µV max input offset voltage, ±0.15% max gain error, 1.1-MHz bandwidth at 200 V/V, and operates across 2.7 V to 120 V common-mode voltage - enabling accurate shunt-based current monitoring in HVAC compressor modules and solid-state LiDAR power stages.

For engineers reviewing the INA290A4QDCKRQ1 datasheet, INA290A4QDCKRQ1 pinout, INA290A4QDCKRQ1 application, or INA290A4QDCKRQ1 equivalent, this page provides verified technical context, validated pin functions, real-world automotive use cases, and two confirmed alternative parts with documented functional and application-level differences - all aligned to TI's SBOS995A production data sheet.

Technical Context

The INA290A4QDCKRQ1 employs a transconductance architecture with current-feedback amplifier topology, enabling 20 µA typical input bias current even at 120 V common-mode voltage and supporting only unidirectional high-side sensing. Its zero-drift input stage achieves ±0.2 µV/°C offset drift and 160-dB DC CMRR, while maintaining 85-dB AC CMRR at 50 kHz.

This device is not rail-to-rail output: it swings to GND + 25 mV (min) and VS – 200 mV (min) under load, with 2 V/µs slew rate and <9 µs settling time to 0.5%. It requires no external gain-setting components and rejects supply variations with ±0.5 µV/V PSRR over 2.7 V–20 V operation.

Key Specifications

Pinout & Package

INA290A4QDCKRQ1 is housed in a space-constrained SC-70 (DCK) package measuring 2.00 mm × 1.25 mm with 5 terminals. The package supports reflow soldering per JEDEC J-STD-020 and is rated for automotive temperature cycling (–40°C to +125°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA290A4QDCKRQ1, INA229AQDGSRQ1 replaces analog output with digital telemetry and calibration flexibility but adds firmware overhead, while MAX40088AUB+T offers marginally higher bandwidth at the expense of automotive qualification and tighter gain/offset specs - making INA290A4QDCKRQ1 optimal for ASIL-B-compliant analog current feedback loops.

Availability

INA290A4QDCKRQ1 is available at Aetrix Electronics and suitable for automotive HVAC compressor modules, solid-state LiDAR power stages, and interior heater modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for INA290A4QDCKRQ1 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 decades of automotive-grade IC development and AEC-Q100 validation expertise.

The INA290-Q1 product line was designed specifically for high-accuracy, high-voltage current sensing in next-generation automotive electrification systems - emphasizing precision, reliability, and functional safety readiness.

FAQ

What is the maximum common-mode voltage the INA290A4QDCKRQ1 can handle during normal operation?

The INA290A4QDCKRQ1 supports an operational common-mode input voltage range of 2.7 V to 120 V. Its survival rating extends to −20 V to +122 V, protecting against transient overvoltage events such as load dump or reverse battery. This makes INA290A4QDCKRQ1 suitable for direct placement on 48-V and 120-V automotive auxiliary rails without external level-shifting circuitry.

Does the INA290A4QDCKRQ1 support bidirectional current sensing?

No, the INA290A4QDCKRQ1 is designed exclusively for unidirectional high-side current sensing. Its internal architecture restricts operation to current flow from supply to load - it cannot measure reverse or sinking current. For bidirectional applications, TI recommends the INA229-Q1 or INA240-Q1 families, which feature symmetric input structures and dual-supply capability.

What is the output voltage swing limitation of the INA290A4QDCKRQ1 at 5-V supply?

At VS = 5 V, the INA290A4QDCKRQ1 output swings from GND + 25 mV (minimum) to VS − 200 mV (maximum) under 10-kΩ load and full temperature range. This means the usable output range is approximately 0.025 V to 4.8 V. Designers must ensure that the shunt-generated signal - scaled by 200 V/V - stays within this window to avoid clipping or nonlinear behavior.

How does the gain option A4 in INA290A4QDCKRQ1 affect shunt resistor selection?

The "A4" suffix denotes 200 V/V fixed gain. With this gain, a 10-A full-scale current requires only 25 mV across the shunt, enabling use of a 2.5-mΩ resistor dissipating just 0.25 W. This reduces thermal drift and PCB footprint versus lower-gain variants - directly improving accuracy and layout robustness in space-constrained automotive modules using INA290A4QDCKRQ1.

Is the INA290A4QDCKRQ1 compatible with standard SC-70 reflow profiles?

Yes, the INA290A4QDCKRQ1 in the SC-70 (DCK) package complies with JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and supports standard Pb-free reflow profiles, including peak temperatures up to 260°C. Its thermal resistance (RθJA = 191.6°C/W) and small 2.0 mm × 1.25 mm footprint make it suitable for dense automotive PCB layouts without special thermal relief requirements.