INA283AIDR

Updated: 2026-09-11

Overview

The INA283AIDR is a high-performance current-sensing amplifier developed by Texas Instruments. It belongs to the INA28x family of devices, which are widely used in industrial and automotive systems for precise current monitoring. This IC is designed to amplify small voltage signals developed across shunt resistors, enabling accurate measurement of current flow in circuits. Its bidirectional capability allows it to measure current in both directions, making it versatile for various applications.

Structure and Working Principle

The INA283AIDR integrates a precision amplifier with a fixed gain of 50 V/V, optimized for current sensing applications. It operates by measuring the voltage drop across an external shunt resistor and amplifying this signal for processing by control systems. The device features a wide common-mode voltage range (-16V to +80V) that allows it to function in high-side or low-side current sensing configurations. Internal circuitry provides excellent CMRR (common-mode rejection ratio) to maintain accuracy even in noisy environments.

Key Features

The INA283AIDR offers several advantages for current measurement applications. Its low offset voltage (maximum 35μV) ensures high accuracy even when measuring small currents. The device operates from a single 2.7V to 18V supply, making it suitable for various power systems. Additional features include a bandwidth of 110kHz, low quiescent current (900μA typical), and operation over an extended temperature range (-40°C to +125°C). These characteristics make it robust for demanding industrial and automotive environments.

Application Areas

This current-sensing amplifier finds widespread use in power supply monitoring, where it helps implement overcurrent protection and efficiency optimization. It's commonly employed in motor control systems to monitor winding currents and detect faults. Other applications include battery management systems for electric vehicles and renewable energy systems, where precise current measurement is critical for state-of-charge calculations and system protection. The device's automotive qualification makes it suitable for use in vehicle power distribution networks.

Maintenance and Precautions

Proper PCB layout is essential when using the INA283AIDR to maintain measurement accuracy. The shunt resistor should be placed close to the device, and sensitive traces should be routed away from high-current paths to minimize noise pickup. Users should ensure the common-mode voltage stays within specified limits and avoid exceeding the absolute maximum ratings. Thermal considerations are important in high-current applications, as the shunt resistor may generate significant heat.

B2B Procurement Guide

When sourcing the INA283AIDR, buyers should verify the manufacturer's part number and packaging (SOIC-8 for this variant). Consider ordering from authorized distributors to ensure genuine components, especially for automotive applications. Lead times can vary, so plan procurement accordingly for production schedules. For high-volume purchases, negotiate pricing based on projected annual usage. Always check for the latest datasheet revisions as specifications may be updated by the manufacturer.