Texas Instruments INA290A1QDCKRQ1

Overview

INA290A1QDCKRQ1 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 20 V/V fixed gain, ±12 µV max input offset voltage, ±0.1% max gain error, 160-dB DC CMRR, and 1.1-MHz bandwidth at 20 V/V - enabling accurate, fast-response current monitoring in 48-V HVAC compressors and solid-state LiDAR front-ends.

For engineers reviewing the INA290A1QDCKRQ1 datasheet, INA290A1QDCKRQ1 pinout, INA290A1QDCKRQ1 application, or INA290A1QDCKRQ1 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 grounded in TI's SBOS995A production data sheet.

Technical Context

The INA290A1QDCKRQ1 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 unidirectional high-side-only current sensing. Its zero-drift input stage achieves ±0.2 µV/°C offset drift and ±5 ppm/°C gain drift across –40°C to +125°C.

This device operates from 2.7 V to 20 V supply, sustains –20 V to +122 V survival common-mode voltage, and delivers rail-to-rail output swing (VS – 0.2 V min, GND + 25 mV max) into 10-kΩ load - critical for interfacing directly with 12-bit+ SAR ADCs in automotive control modules without external level-shifting.

Key Specifications

Pinout & Package

INA290A1QDCKRQ1 is housed in a 5-pin SC-70 (DCK) package with 0.65-mm pitch and 2.0 mm × 1.25 mm body size - optimized for thermal performance (RθJA = 191.6°C/W) and high-voltage automotive PCB routing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision automotive current sensing applications.

Compared with INA240A1QDRQ1 and MAX40056ATA+T, the INA290A1QDCKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 1.1-MHz bandwidth, and ±12-µV offset in a 2.0-mm × 1.25-mm SC-70 package - making it the only option qualified for safety-critical, space-constrained, high-speed automotive current sensing.

Availability

INA290A1QDCKRQ1 is available at Aetrix Electronics and suitable for automotive HVAC compressor modules, solid-state LiDAR power stages, interior heater modules, and parking heater modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for INA290A1QDCKRQ1 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 design expertise and ISO/TS 16949-certified manufacturing.

The INA290-Q1 product line was engineered specifically for AEC-Q100-compliant, high-accuracy current sensing in next-generation 12-V/48-V hybrid and electric vehicle subsystems - emphasizing precision, speed, and robustness under harsh automotive conditions.

FAQ

What is the maximum common-mode voltage the INA290A1QDCKRQ1 can handle during normal operation?

The INA290A1QDCKRQ1 operates with a common-mode input range of 2.7 V to 120 V under recommended conditions. Its survival rating extends to –20 V to +122 V, allowing tolerance of automotive load-dump transients and cold-crank events without damage. This range is validated per TI SBOS995A Section 6.1 and enables direct placement on 48-V battery rails.

Does the INA290A1QDCKRQ1 support bidirectional current sensing?

No, the INA290A1QDCKRQ1 supports unidirectional high-side current sensing only, as confirmed in TI SBOS995A Section 7.4.1. Its internal architecture is optimized for current flow from supply to load, and it cannot accurately measure reverse current or low-side configurations. For bidirectional applications, TI recommends the INA229-Q1 or similar devices.

What is the output voltage swing capability of the INA290A1QDCKRQ1 at 125°C ambient?

At TA = +125°C and RL = 10 kΩ, the INA290A1QDCKRQ1 output swings to within 0.2 V of VS (VS – 0.2 V minimum) and to within 25 mV of GND (GND + 0.025 V minimum), per TI SBOS995A Electrical Characteristics Table 6-5. This rail-swing capability ensures full dynamic range utilization with 3.3-V or 5-V MCU ADC references across the full automotive temperature range.

How does the gain option A1 in INA290A1QDCKRQ1 affect shunt resistor selection?

The "A1" suffix denotes 20-V/V fixed gain. With this gain, a 5-V full-scale output requires only 250 mV across the shunt, enabling use of lower-value resistors (e.g., 25 mΩ for 10-A full scale). Per TI SBOS995A Table 8-1, this reduces shunt power dissipation to 2.5 W versus 10 W at 100-V/V - critical for thermal management in enclosed heater modules.

Is the INA290A1QDCKRQ1 pin-compatible with other devices in the INA290-Q1 family?

Yes, all INA290-Q1 variants (A1–A5) share identical SC-70 (DCK) 5-pin packaging and pinout per TI SBOS995A Figure 5-1 and Table 5-1. The only difference is internal gain setting; therefore, A1, A2, A3, A4, and A5 devices are mechanically and electrically interchangeable on PCBs - allowing gain optimization without layout changes.