Texas Instruments INA282AQDGKRQ1

Overview

INA282AQDGKRQ1 from Texas Instruments is an automotive-grade, bidirectional voltage-output current shunt monitor designed for high-accuracy sensing across shunt resistors in low- or high-side configurations. It operates with a –14 V to +80 V common-mode range, ±20 μV offset voltage, 140 dB CMRR, 50 V/V fixed gain, and 900 μA max quiescent current-enabling precise battery current monitoring in EV powertrain control units.

For engineers reviewing the INA282AQDGKRQ1 datasheet, INA282AQDGKRQ1 pinout, INA282AQDGKRQ1 application, or INA282AQDGKRQ1 equivalent, this device supports functional safety–capable designs in AEC-Q100 Grade 1 (–40°C to +125°C) environments, delivers 10 mV full-scale sensing capability via zero-drift architecture, and integrates dual reference inputs (REF1/REF2) for unidirectional or bidirectional output biasing.

Technical Context

The INA282AQDGKRQ1 employs a zero-drift chopper-stabilized amplifier architecture to achieve ±20 μV offset and 0.3 μV/°C drift over –40°C to +125°C, enabling accurate sub-100 mV shunt voltage measurement. Its switched-capacitor input stage delivers 140 dB DC CMRR but introduces discrete-time behavior, resulting in 10 kHz effective bandwidth and transient settling within 15 μs after common-mode steps.

It supports flexible output referencing via REF1 and REF2 pins-configurable for ground-referenced (unidirectional), V+-referenced (diagnostic), or externally biased (bidirectional) operation-with internal resistor divider ensuring matched reference gain and <±0.5% divider accuracy. The NC pin (Pin 4) is unconnected and must be left floating or tied to GND.

Key Specifications

Pinout & Package

VSSOP-8 package (3.00 mm × 3.00 mm body size), thermally enhanced for automotive PCB layouts with limited airflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA282AQDGKRQ1, INA240A1QDRQ1 trades lower gain and higher IQ for 12× bandwidth-ideal for servo control-while MAX40056ATA+T sacrifices reference configurability and offset performance for higher gain and speed in fixed-direction applications.

Availability

INA282AQDGKRQ1 is available at Aetrix Electronics and suitable for EV battery management, electric power steering, and brake system applications requiring stable component supply across automotive production lifecycles.

Supply support for INA282AQDGKRQ1 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 INA28x-Q1 product line was engineered specifically for AEC-Q100-compliant current sensing in high-voltage automotive subsystems-including traction inverters, battery disconnect units, and ADAS power domains-where precision, reliability, and transient resilience are critical.

FAQ

What is the maximum common-mode voltage the INA282AQDGKRQ1 can handle?

The INA282AQDGKRQ1 supports a common-mode input voltage range of –14 V to +80 V. This allows it to directly interface with 12 V and 48 V automotive battery rails, survive reverse-battery conditions down to –14 V, and withstand ISO 7637-2 load-dump transients up to +80 V without external protection components-making it ideal for under-hood deployment in INA282AQDGKRQ1-based systems.

Does the INA282AQDGKRQ1 support bidirectional current sensing?

Yes, the INA282AQDGKRQ1 supports bidirectional current sensing through its dual reference inputs (REF1 and REF2). By applying a mid-supply voltage (e.g., V+/2) to both pins, the output centers at that voltage-allowing symmetric positive and negative output swings corresponding to forward and reverse current flow across the shunt. This configuration is explicitly validated in the INA282AQDGKRQ1 datasheet for applications like regenerative braking current monitoring.

What package type is used for the INA282AQDGKRQ1?

The INA282AQDGKRQ1 is packaged in an 8-pin VSSOP (DGK) package with nominal dimensions of 3.00 mm × 3.00 mm. This thermally enhanced surface-mount package provides improved power dissipation over SOIC-8 and is optimized for high-density automotive PCB layouts where space and thermal performance are constrained-consistent with the official TI packaging data for INA282AQDGKRQ1.

How does the zero-drift architecture improve accuracy in the INA282AQDGKRQ1?

The zero-drift chopper-stabilized architecture in the INA282AQDGKRQ1 achieves ±20 μV maximum offset voltage and only ±0.3 μV/°C drift over –40°C to +125°C. This enables accurate measurement of shunt voltages as low as 10 mV full-scale-reducing shunt power loss by 90% compared to conventional amplifiers requiring 100 mV drops-directly enhancing efficiency and thermal margin in INA282AQDGKRQ1-based battery monitoring circuits.

Is the INA282AQDGKRQ1 qualified for automotive safety standards?

Yes, the INA282AQDGKRQ1 is AEC-Q100 qualified for Grade 1 (–40°C to +125°C ambient), with documented HBM ±2 kV and CDM ±750 V ESD ratings. It is also functional safety–capable, with TI providing FMEDA reports, FIT data, and diagnostic coverage guidance to support ISO 26262 ASIL-B system development-making the INA282AQDGKRQ1 suitable for safety-critical applications such as EPS and brake control modules.