Texas Instruments INA283AID

Overview

INA283AID from Texas Instruments is a high-accuracy, zero-drift current shunt monitor IC designed for bidirectional sensing across shunt resistors in high common-mode voltage environments. It features 200 V/V fixed gain, –14 V to +80 V input common-mode range, ±20 µV max offset voltage, and operates from 2.7 V to 18 V supply - enabling precise low-side and high-side current measurement in telecom power supplies and solar inverter DC-link monitoring.

For engineers reviewing the INA283AID datasheet, INA283AID pinout, INA283AID application, or INA283AID equivalent, this device supports critical design tasks including high-voltage battery management sensing, fault-tolerant motor drive current feedback, and wide-dynamic-range industrial power rail monitoring where sub-10 mV full-scale shunt drops must be resolved with <0.3 µV/°C drift.

Technical Context

The INA283AID employs 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 sensing at 10 mV full-scale shunt voltage. Its switched-capacitor input stage delivers 140 dB CMRR and supports operation with common-mode voltages extending 14 V below GND - critical for automotive load-dump transient resilience and isolated DC bus monitoring.

This device integrates dual reference inputs (REF1, REF2) that allow configurable unidirectional or bidirectional output biasing between GND and V+, supporting ground-referenced, V+-referenced, or externally referenced output modes without external op-amps or level-shifting circuitry.

Key Specifications

Pinout & Package

INA283AID is available in SOIC-8 (4.90 mm × 3.91 mm) and VSSOP-8 (3.00 mm × 3.00 mm) packages. Both variants share identical pinout and thermal performance per JEDEC MS-012 and MO-178 standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA286AID and INA240A2D, the INA283AID provides optimal resolution for low-shunt-drop applications (10–20 mV) in telecom and solar systems requiring maximum gain without sacrificing zero-drift stability or thermal drift performance.

Availability

INA283AID is available at Aetrix Electronics and suitable for telecom power supply monitoring, automotive battery management, and solar inverter DC-link sensing requiring stable component supply across extended temperature and high-reliability production cycles.

Supply support for INA283AID 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 50 years of precision amplifier innovation.

The INA28x product line was engineered specifically for high-accuracy bidirectional current sensing in harsh electrical environments - targeting automotive, industrial, and renewable energy systems where wide common-mode range and zero-drift stability are non-negotiable.

FAQ

What is the maximum common-mode voltage the INA283AID can handle?

The INA283AID 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 is placed on a node 14 V below ground or up to 80 V above ground - making it suitable for automotive battery reverse-polarity protection and high-side 48 V/60 V bus monitoring. This rating is absolute and does not depend on supply voltage.

Does the INA283AID require external components for basic operation?

No, the INA283AID operates autonomously with only a single supply (2.7 V to 18 V), a shunt resistor, and optional reference connections. No external gain-setting resistors, compensation capacitors, or level-shifters are needed - its 200 V/V gain is factory-trimmed and internally fixed. Decoupling capacitors on V+ are recommended but not strictly required for basic functionality.

How does the REF1 and REF2 pin configuration affect output behavior in the INA283AID?

In the INA283AID, the average voltage of REF1 and REF2 sets the output's zero-current baseline: tying both to GND yields ground-referenced unidirectional output; connecting both to V+ gives V+-referenced diagnostics mode; applying an external reference (e.g., 2.048 V) enables precise bidirectional centering. The pins are internally matched, so asymmetrical connections degrade accuracy and are not supported.

Can the INA283AID be used for bidirectional current sensing?

Yes, the INA283AID supports true bidirectional current sensing by biasing the output to mid-supply using REF1 and REF2. When both reference pins are set to V+/2, the output centers at V+/2 - rising for positive current flow (+IN > –IN) and falling for negative flow (–IN > +IN). This enables symmetric measurement ranges such as ±50 A with a single 1 mΩ shunt and 5 V supply.

What is the typical supply current consumption of the INA283AID?

The INA283AID draws a maximum of 900 µA over temperature and supply voltage, with typical consumption around 600–750 µA at 25°C and 5 V supply. This ultra-low quiescent current enables always-on current monitoring in battery-backed systems and energy-sensitive telecom equipment without compromising offset or drift performance.