Texas Instruments INA280A1QDCKRQ1

Overview

INA280A1QDCKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40 °C to +125 °C) high-precision current sense amplifier optimized for unidirectional high-side sensing in automotive power systems. It delivers 20 V/V fixed gain, ±0.5% max gain error, ±150 µV max input offset voltage, 1.1 MHz bandwidth at 20 V/V, and operates across 2.7 V to 120 V common-mode input range - enabling accurate DC and fast transient current monitoring in 48-V HVAC compressor modules.

For engineers reviewing the INA280A1QDCKRQ1 datasheet, INA280A1QDCKRQ1 pinout, INA280A1QDCKRQ1 application, or INA280A1QDCKRQ1 equivalent, this page provides verified specifications, SC-70 package layout, functional safety documentation support, AEC-Q100 qualification evidence, and real-world automotive use cases - all grounded in TI's SBOSA48 production datasheet.

Technical Context

The INA280A1QDCKRQ1 uses a transconductance architecture with current-feedback amplifier topology, enabling 20 µA typical input bias current even at 120 V common-mode voltage and restricting operation to high-side-only sensing. Its internal precision resistor network fixes gain at 20 V/V with ±20 ppm/°C drift and supports unidirectional current flow only - no bidirectional or low-side configurations.

It achieves 120 dB minimum DC CMRR and 85 dB AC CMRR at 50 kHz while maintaining 2 V/µs slew rate and <2 µs response time for 75-A overcurrent detection on a 2-mΩ shunt. The device operates from 2.7 V to 20 V supply, draws 370 µA quiescent current, and outputs within 70 mV of VS and 25 mV of GND under full temperature range.

Key Specifications

Pinout & Package

INA280A1QDCKRQ1 is housed in a space-constrained SC-70 (DCK) 5-pin package with 2.00 mm × 1.25 mm body size and 0.65-mm lead pitch - optimized for high-density automotive PCB layouts where thermal performance (R_θJA = 191.6 °C/W) and board area are critical.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA280A1QDCKRQ1, INA240A1QDRQ1 offers configurable gain and bidirectional capability at higher quiescent current and lower CMRR, while MAX40056ATA+T provides slightly higher bandwidth but no AEC-Q100 qualification - making INA280A1QDCKRQ1 the optimal choice for cost-sensitive, space-constrained, Grade 1-compliant automotive high-side sensing.

Availability

INA280A1QDCKRQ1 is available at Aetrix Electronics and suitable for automotive HVAC compressor modules, solid-state LiDAR power monitoring, and interior/parking heater modules requiring stable component supply, AEC-Q100 traceability, and long-term automotive lifecycle support.

Supply support for INA280A1QDCKRQ1 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 manufacturing expertise.

INA280A1QDCKRQ1 belongs to TI's AEC-Q100-qualified current sense amplifier product line, designed specifically for high-reliability, high-accuracy current monitoring in automotive electrification systems including 12-V, 24-V, and 48-V power domains.

FAQ

What is the maximum common-mode voltage the INA280A1QDCKRQ1 can handle during normal operation?

The INA280A1QDCKRQ1 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, allowing it to withstand automotive load-dump transients without damage. This makes INA280A1QDCKRQ1 suitable for direct connection to 48-V battery rails in HVAC compressors and parking heaters without external protection circuitry.

Does the INA280A1QDCKRQ1 support bidirectional current sensing?

No, the INA280A1QDCKRQ1 is strictly a unidirectional current sense amplifier. Its internal architecture restricts operation to high-side sensing only, where current flows from supply to load. It cannot measure reverse or sinking current. For bidirectional applications, consider alternatives like the INA240A1QDRQ1, which supports both directions and offers programmable gain.

What is the guaranteed gain error specification for INA280A1QDCKRQ1 across temperature?

The INA280A1QDCKRQ1 has a maximum gain error of ±0.5% over the full AEC-Q100 Grade 1 temperature range (–40 °C to +125 °C), with a maximum gain drift of ±20 ppm/°C. This ensures that gain remains stable and predictable in under-hood environments, directly contributing to repeatable current measurement accuracy in automotive pump and heater modules.

Can the INA280A1QDCKRQ1 be used with a 3.3-V supply voltage?

Yes, the INA280A1QDCKRQ1 operates from 2.7 V to 20 V supply, so 3.3 V is fully supported. At 3.3 V, its output swings within 70 mV of VS and 25 mV of GND, delivering a usable 3.23-V output range. This allows seamless interface with 3.3-V microcontrollers and ADCs in modern automotive domain controllers without level-shifting.

Is functional safety documentation available for INA280A1QDCKRQ1?

Yes, Texas Instruments provides functional safety documentation for INA280A1QDCKRQ1, including FIT rate data, failure mode effects analysis (FMEA), and a safety manual - all intended to aid ISO 26262 ASIL-B system-level design. This documentation is accessible through TI's official product folder and supports safety-critical automotive applications such as electric pump control and heater thermal management.