Texas Instruments INA290A5QDCKRQ1

Overview

INA290A5QDCKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) ultra-precise current sense amplifier optimized for high-side unidirectional sensing in automotive power systems. It delivers 500 V/V fixed gain, ±12 µV max input offset voltage, ±0.15% max gain error, 1.1-MHz bandwidth at 500 V/V, and operates across 2.7 V to 120 V common-mode voltage - enabling accurate shunt-based current monitoring in solid-state LiDAR and HVAC compressor modules.

For engineers reviewing the INA290A5QDCKRQ1 datasheet, INA290A5QDCKRQ1 pinout, INA290A5QDCKRQ1 application, or INA290A5QDCKRQ1 equivalent, this page provides verified technical context, real-world design meaning of key specs, SC-70 pin mapping, functional alternatives with documented differences, and supply-chain support for automotive-grade production.

Technical Context

The INA290A5QDCKRQ1 uses a transconductance architecture with current-feedback amplifier topology, enabling low input bias current (20 µA typ) even at 120 V common-mode voltage and supporting only high-side unidirectional operation. Its zero-drift input stage achieves ±0.2 µV/°C offset drift and 160-dB DC CMRR, critical for stable DC current measurement over temperature.

Bandwidth is gain-dependent: at 500 V/V, it delivers 800 kHz (–3 dB) with 2 V/µs slew rate and <9 µs settling time to 0.5%, making it suitable for fast overcurrent detection in automotive pumps and parking heater modules where response latency must be sub-microsecond.

Key Specifications

Pinout & Package

INA290A5QDCKRQ1 is housed in a space-constrained SC-70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for high-density automotive PCB layouts. The 5-pin configuration supports high-side sensing with minimal external components.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A5QDRQ1 and MAX40056ATA+T, the INA290A5QDCKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 120-V common-mode capability, and ±12 µV offset - making it the only option for precision current sensing in 48-V/120-V automotive subsystems requiring both functional safety and µA-level resolution.

Availability

INA290A5QDCKRQ1 is available at Aetrix Electronics and suitable for automotive HVAC compressor modules, solid-state LiDAR power supplies, and parking heater control units requiring stable component supply across extended vehicle lifecycles.

Supply support for INA290A5QDCKRQ1 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 INA290-Q1 product line was designed specifically for ultra-precise, high-common-mode current sensing in next-generation automotive electrification systems - targeting ASIL-B functional safety compliance and long-term reliability in harsh under-hood environments.

FAQ

What is the maximum common-mode voltage the INA290A5QDCKRQ1 can measure?

The INA290A5QDCKRQ1 supports an operational common-mode input voltage range from 2.7 V to 120 V, with survival ratings from –20 V to +122 V. This allows direct high-side sensing on 48-V battery rails and 120-V HVAC compressor inverters without external level-shifting circuitry. The device's internal topology restricts use to high-side configurations only - it does not support low-side or bidirectional sensing.

Does the INA290A5QDCKRQ1 support bidirectional current measurement?

No, the INA290A5QDCKRQ1 operates exclusively in unidirectional mode, measuring current flowing from supply to load only. Its functional block diagram and pin configuration (IN+ on supply side, IN− on load side) are optimized for high-side sensing. For bidirectional applications, TI recommends the INA229-Q1 or similar devices with dual-supply architecture and symmetric input stages.

What is the output voltage swing limitation of the INA290A5QDCKRQ1?

The INA290A5QDCKRQ1 output swings from GND + 5 mV (min) to VS – 200 mV (max) under load, per electrical characteristics. At 5-V supply, this yields a usable output range of 5 mV to 4.8 V. To avoid clipping near ground, the minimum sense voltage must be ≥25 mV (i.e., 50 µA through a 1-mΩ shunt at 500 V/V gain). This constraint is critical when selecting RSENSE for low-current applications.

How does the bandwidth of the INA290A5QDCKRQ1 vary with gain setting?

Bandwidth is inversely gain-dependent: at 500 V/V, the –3-dB bandwidth is 800 kHz; at 200 V/V it rises to 850 kHz; at 100 V/V to 900 kHz; and at 20 V/V to 1.1 MHz. This trade-off reflects internal compensation - higher gain versions prioritize DC precision over speed. For fast overcurrent detection in automotive pumps, the 800-kHz bandwidth still supports reliable response to transients up to ~125 kHz.

Is the INA290A5QDCKRQ1 compatible with standard SC-70 PCB footprints?

Yes, the INA290A5QDCKRQ1 uses the industry-standard 5-pin SC-70 (DCK) package with nominal body dimensions of 2.00 mm × 1.25 mm and 0.65-mm lead pitch. Its footprint matches JEDEC MO-203-AB specifications, enabling drop-in compatibility with existing SC-70 layout templates. Thermal performance is optimized with recommended copper pour under the exposed pad (if present) - though DCK has no thermal pad, board-level copper area remains critical for RθJB = 69.2 °C/W.