Texas Instruments INA282AIDGKT

Overview

INA282AIDGKT from Texas Instruments is a zero-drift, high-accuracy current shunt monitor IC designed for bidirectional sensing across precision shunts in high common-mode voltage environments. It features 50 V/V fixed gain, ±20 µV max offset voltage, 140 dB CMRR, and operates from +2.7 V to +18 V supply while supporting –14 V to +80 V input common-mode range - enabling accurate low-side and high-side current measurement in telecom power supplies and solar inverter DC-link monitoring.

For engineers reviewing the INA282AIDGKT datasheet, INA282AIDGKT pinout, INA282AIDGKT application, or INA282AIDGKT equivalent, this device is selected for high-precision, wide common-mode current sensing where sub-10 mV full-scale shunt drops, minimal temperature drift (0.3 µV/°C), and rail-to-rail output swing under load are critical design requirements.

Technical Context

The INA282AIDGKT uses a zero-drift chopper-stabilized architecture with switched-capacitor input stages to achieve ultra-low offset and near-zero drift over temperature. Its differential input stage rejects common-mode voltages up to +80 V and down to –14 V independent of supply voltage, enabling direct connection to shunts in battery management or motor drive systems without level-shifting circuitry.

It delivers 50 V/V fixed gain with ±1.4% max gain error over –40°C to +125°C, supports unidirectional or bidirectional operation via REF1/REF2 reference pins, and exhibits 10 kHz effective bandwidth with transient recovery within 15 µs after common-mode step disturbances.

Key Specifications

Pinout & Package

VSSOP-8 package (3.00 mm × 3.00 mm body size), thermally enhanced for high-density PCB layouts in power electronics modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current shunt monitor applications.

Compared with INA240AIDR and MAX4080TASA+, the INA282AIDGKT delivers the lowest offset and drift in its class, making it optimal for metrology-grade current measurement where sub-0.2% error at low shunt voltages is non-negotiable - especially in solar, telecom, and battery safety-critical functions.

Availability

INA282AIDGKT is available at Aetrix Electronics and suitable for telecom power supplies, automotive battery management systems, and solar inverter DC-link monitoring requiring stable component supply across multi-year production cycles.

Supply support for INA282AIDGKT 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 expertise in precision signal conditioning and power management ICs.

The INA28x product line was engineered specifically for high-accuracy, wide common-mode current sensing in harsh industrial, automotive, and renewable energy systems - prioritizing zero-drift performance, transient resilience, and seamless integration with microcontroller ADCs.

FAQ

What is the maximum common-mode voltage the INA282AIDGKT can handle?

The INA282AIDGKT supports a common-mode input voltage range of –14 V to +80 V, independent of its supply voltage. This allows direct high-side sensing on 48 V telecom buses or automotive 12 V systems experiencing load-dump transients up to 80 V. The device maintains specified performance across this full range when operated within its recommended supply (2.7 V to 18 V) and temperature (–40°C to +125°C) conditions. No external level-shifting or protection circuitry is required within these limits.

How does the REF1 and REF2 pin configuration affect INA282AIDGKT output behavior?

The REF1 and REF2 pins set the quiescent output voltage of the INA282AIDGKT. When both are tied to GND, the output rests near 0 V for unidirectional sensing; when tied to V+, it rests near V+ for diagnostic pre-power checks. For bidirectional operation, connecting REF1 and REF2 to an external reference (e.g., V+/2) centers the output, enabling symmetric ±current measurement. The internal reference divider ensures matched tracking - critical for maintaining accuracy across temperature and supply variations in the INA282AIDGKT.

What is the typical output swing capability of the INA282AIDGKT under load?

The INA282AIDGKT delivers rail-to-rail output swing: minimum GND + 15 mV and maximum V+ – 400 mV into a 10 kΩ load at room temperature. At –40°C to +125°C, swing degrades slightly to GND + 40 mV and V+ – 400 mV. This performance enables direct interface with 12-bit and 16-bit SAR ADCs without level-shifting. Output impedance remains low (1.5 Ω), ensuring stability with capacitive loads up to 1 nF - a key specification verified in the INA282AIDGKT datasheet Figure 16.

Can the INA282AIDGKT be used for bidirectional current sensing in battery applications?

Yes - the INA282AIDGKT supports true bidirectional current sensing via configurable REF1/REF2 reference inputs. Setting both pins to V+/2 establishes a mid-supply quiescent output, allowing equal positive and negative output excursions for charge and discharge currents. Its ±20 µV offset and 0.3 µV/°C drift ensure <0.2% error at 10 mV shunt drops, making it ideal for precision state-of-charge estimation in Li-ion and lead-acid battery management systems. This capability is explicitly validated in the INA282AIDGKT functional description and typical application circuits.

What packaging and thermal characteristics apply to the INA282AIDGKT?

The INA282AIDGKT is supplied in an 8-pin VSSOP package (DGK) with 3.00 mm × 3.00 mm body size and 0.65 mm lead pitch. Its thermal resistance is RθJA = 164.1°C/W, RθJB = 85.0°C/W, and ψJB = 83.3°C/W - indicating strong board-level heat conduction. The exposed pad variant is not used; thermal performance relies on copper pour under pins 2 (GND) and 6 (V+). These values are measured per JEDEC JESD51 standards and published in the INA282AIDGKT datasheet Section 6.4.