Texas Instruments INA286AIDR

Overview

INA286AIDR from Texas Instruments is a high-accuracy, zero-drift current shunt monitor optimized for bidirectional sensing across shunt resistors in high common-mode voltage environments. It features 100 V/V gain, ±20 µV max offset voltage, 140 dB CMRR, –14 V to +80 V common-mode input range, and operates from 2.7 V to 18 V supply - enabling precise low-side and high-side current measurement in telecom power supplies and automotive battery management systems.

For engineers reviewing the INA286AIDR datasheet, INA286AIDR pinout, INA286AIDR application, or INA286AIDR equivalent, this page delivers verified technical context, SOIC-8 package mapping, real-world use-value per application, and two validated alternative parts with documented functional and selection differences.

Technical Context

The INA286AIDR uses a zero-drift chopper-stabilized architecture to achieve ±20 µV offset and 0.3 µV/°C drift over –40°C to +125°C, enabling accurate 10 mV full-scale shunt sensing. Its switched-capacitor input stage delivers 140 dB DC CMRR but introduces discrete-time step response behavior, with transient recovery within 15 µs after common-mode disturbances.

It supports unidirectional (ground- or V+-referenced) and bidirectional operation via dual reference inputs (REF1/REF2), allowing output biasing from GND to V+ while maintaining 0–9 V effective reference voltage limit. The device draws ≤900 µA quiescent current and provides 10 kHz effective bandwidth at 100 V/V gain.

Key Specifications

Pinout & Package

INA286AIDR is packaged in an 8-pin SOIC (D) body measuring 4.90 mm × 3.91 mm, with standard JEDEC MS-012AC footprint and gull-wing leads. Thermal resistance R_θJA is 134.9°C/W, supporting operation up to +125°C ambient with moderate PCB copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA282AIDR and INA283AIDR, the INA286AIDR provides the optimal balance of sensitivity (100 V/V) and dynamic range for 10 mV shunt designs - avoiding excessive gain noise (INA283) while delivering higher resolution than INA282 in mid-range current sensing.

Availability

INA286AIDR is available at Aetrix Electronics and suitable for telecom power supply monitoring, automotive battery management, solar inverter DC link monitoring, and industrial motor drive phase current sensing requiring stable component supply across extended temperature and high-reliability production cycles.

Supply support for INA286AIDR 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90 years of innovation in precision signal conditioning.

The INA28x product line was designed specifically for high-accuracy, wide common-mode current sensing in power conversion, battery management, and industrial control - emphasizing zero-drift stability, fault tolerance, and seamless integration with microcontroller ADCs.

FAQ

What is the maximum common-mode voltage the INA286AIDR can handle?

The INA286AIDR supports a common-mode input voltage range of –14 V to +80 V, meaning it can accurately measure shunt voltage drops even when the shunt's terminals sit at potentials far beyond its own supply rail - such as +60 V in a 48 V telecom system powered from 5 V. This eliminates external level-shifting circuitry and enables direct high-side sensing in harsh automotive and industrial environments.

Does the INA286AIDR require external calibration for offset drift over temperature?

No. The INA286AIDR uses a zero-drift chopper architecture that guarantees a maximum offset drift of only 0.3 µV/°C over –40°C to +125°C. With ±20 µV max initial offset, total drift remains under ±1.5 µV across the full temperature range - enabling stable 10 mV full-scale sensing without factory or field calibration, unlike traditional op-amp-based current monitors.

How do REF1 and REF2 pins configure bidirectional operation in the INA286AIDR?

In bidirectional mode, REF1 and REF2 are tied together and connected to a mid-supply reference (e.g., V+/2), setting the INA286AIDR's quiescent output to that voltage. A positive differential input (+IN > –IN) drives OUT above the reference; negative differential input drives it below - enabling symmetric ±1 V output for 10 mV shunt drops. This configuration avoids clipping and maximizes ADC dynamic range for charge/discharge current measurement.

Can the INA286AIDR operate from a 3.3 V supply?

Yes. The INA286AIDR is fully specified from 2.7 V to 18 V supply voltage. At 3.3 V, it maintains 100 V/V gain, ±20 µV offset, and 10 kHz bandwidth while drawing ≤900 µA. Its output swings from GND + 15 mV to V+ – 400 mV - delivering 0.15 V to 2.95 V for 10 mV shunt input, compatible with most 3.3 V SAR or delta-sigma ADCs without level shifting.

What is the purpose of the NC pin (Pin 4) on the INA286AIDR?

Pin 4 of the INA286AIDR is a no-connect (NC) terminal - it has no internal connection and serves no electrical function. Texas Instruments specifies that it may be left floating or tied to GND; neither choice affects performance. This pin exists for mechanical symmetry in the SOIC-8 package and must not be used for grounding, decoupling, or any other circuit function.