Texas Instruments INA282AIDGKR

Overview

INA282AIDGKR 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 INA282AIDGKR datasheet, INA282AIDGKR pinout, INA282AIDGKR application, or INA282AIDGKR equivalent, this page delivers verified specifications, validated VSSOP-8 pin functions, real-world use cases in automotive battery management and industrial motor drives, and two confirmed alternative parts with documented functional and layout implications.

Technical Context

The INA282AIDGKR employs a zero-drift chopper-stabilized architecture to achieve ±0.3 µV/°C max offset drift and 0.005%/°C gain drift, enabling stable sub-10 mV full-scale shunt voltage measurements over –40°C to +125°C. Its switched-capacitor input stage delivers 140 dB CMRR but introduces discrete-time behavior, limiting effective bandwidth to 10 kHz and requiring attention to common-mode step transients.

It supports unidirectional or bidirectional operation via dual reference inputs (REF1/REF2), allowing output biasing from GND to V+ or at mid-supply - critical for interfacing with SAR ADCs or microcontroller analog inputs without level-shifting. The device draws ≤900 µA quiescent current and drives loads up to 1 nF capacitively without oscillation.

Key Specifications

Pinout & Package

VSSOP-8 package (3.00 mm × 3.00 mm), thermally enhanced for high-density PCB layouts; pin-compatible with SOIC-8 variant (INA282AIDR) but with 35% smaller footprint and improved thermal resistance (R_θJA = 164.1°C/W).

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 INA282AIDGKR delivers superior DC accuracy (±20 µV vs. ≥100 µV), tighter gain error (±1.4% vs. ±2%), and extended negative common-mode range (–14 V vs. –0.1 V or –4 V), making it optimal for low-shunt, wide-temperature, safety-critical current sensing.

Availability

INA282AIDGKR is available at Aetrix Electronics and suitable for telecom equipment, automotive battery management systems, and solar inverter DC-link monitoring requiring stable component supply across extended temperature and voltage ranges.

Supply support for INA282AIDGKR 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 environments - targeting automotive, industrial, and renewable energy applications demanding long-term stability and fault resilience.

FAQ

What is the maximum common-mode voltage the INA282AIDGKR can handle?

The INA282AIDGKR supports a common-mode input voltage range of –14 V to +80 V, independent of its supply voltage. This allows safe high-side sensing in 48-V telecom systems and tolerance of automotive load-dump transients up to +80 V. Operation outside this range risks permanent damage, as specified in the absolute maximum ratings table of the SBOS485C datasheet.

Does the INA282AIDGKR require external calibration for offset or gain error?

No - the INA282AIDGKR uses an integrated zero-drift architecture that maintains ±20 µV max offset and ±1.4% max gain error over –40°C to +125°C without external trimming. Its 0.3 µV/°C offset drift and 0.005%/°C gain drift eliminate the need for system-level calibration in most industrial and automotive applications where the INA282AIDGKR is deployed.

Can the INA282AIDGKR measure bidirectional current, and how is it configured?

Yes - the INA282AIDGKR supports bidirectional current sensing by biasing its REF1 and REF2 pins to a mid-supply voltage (e.g., V+/2), setting the output quiescent point at mid-scale. When current flows in either direction across the shunt, the output swings symmetrically above or below this reference. This configuration is explicitly detailed in Section 7.4.1.2 of the SBOS485C datasheet for the INA282AIDGKR.

What is the purpose of the NC pin (Pin 4) on the INA282AIDGKR VSSOP-8 package?

Pin 4 on the INA282AIDGKR is labeled NC (No Connect) and is not internally bonded. Per TI's Pin Descriptions table in SBOS485C, it may be left floating or tied to GND - no electrical function is assigned. Routing traces or placing copper pour on this pad provides no benefit and risks unintended coupling; TI recommends leaving it unconnected or grounded solely for mechanical stability.

How does the INA282AIDGKR's 10-kHz bandwidth affect its use in PWM motor control systems?

The INA282AIDGKR's 10-kHz effective bandwidth supports accurate sampling of motor phase currents in PWM-driven systems operating up to 20-kHz carrier frequencies, provided the ADC sampling rate exceeds 40 kSPS per Nyquist criterion. Its discrete-time response requires attention to common-mode step timing, but typical motor current waveforms remain fully captured - as validated in Figure 27–30 of the SBOS485C datasheet for the INA282AIDGKR.