Current-Sense Amplifiers

Current-sense amplifiers (CSAs) monitor current flow through a shunt (sense) resistor and provide closed-loop feedback of system loads. Current-sense amps are optimized for a wide range of applications, including overcurrent protection and optimization of power monitoring systems. We offer a wide range of current-sense amplifiers for both high-side sensing and low-side sensing, as well as unidirectional or bidirectional current flow through the sense resistor.

All Current-Sense Amps 

Precision Current-Sense Amplifiers

Our broad portfolio of precision current-sense amplifiers help you measure multiple decades of current. Decrease your sense resistor impedance and improve system efficiency with our low offset current-sense amplifiers. Achieve faster signal processing and acquisition time for improved AC performance with our wideband current-sense amplifiers.

Precision CSAs 

High Voltage Current-Sense Amplifiers

Our high-side, high voltage current-sense amplifiers offer input ranges up to +76V and down to -20V. These high voltage CSAs are ideal for applications such as motor control, electrical instrumentation, automatic test equipment (ATE), automotive electronic control units, communications base stations, network routers, and servers.

High-Voltage CSAs 

Low-Power and Space-Saving Current-Sense Amplifiers

Our broad portfolio of nanoPower and Micropower current-sense amplifiers help maximize and extend system and battery life without compromising DC accuracy. These tiny CSAs are available in a variety of space-saving, small footprint packages, such as SC70, SOT23, and wafer level packages (WLP).

Low-Power and Space-Saving CSAs 


Current-Sense Amp Featured Products


Introduction to the MAX40056F/T/U Bidirectional Current Sense Amplifier with PWM-Rejection

This video provides an introduction to the MAX40056, a bi-directional current-sense amplifier with an input common-mode range that extends from -0.1Vto +65V together with protection against negative inductive kickback voltages to -5V.

How to Measure Current with the MAX4173 Current-Sense Amplifier and a Microcontroller

In this video, Sean uses the MAX4173 Evaluation Kit together with an Arduino® Uno to measure current. He also discusses the principle behind measuring current and why a current-sense amplifier is a very useful addition to this technique.

Learn more › MAX4173

DC Motor Current Sensing in a PWM Environment with the MAX40056 Current-Sense Amplifier

DC Motor Current Sensing in a PWM Environment with the MAX40056 Current-Sense Amplifier

Ashwin demonstrates how the MAX40056 bidirectional current-sense amplifier performs rejection of high common-mode PWM signals to accurately measure torque and speed in a three-phase brushless DC (BLDC) motor system.

Learn more › MAX40056

[Internal] Introduction to the MAX40056F/T/U Bidirectional Current Sense Amplifier with PWM-Rejection

This video provides an introduction to the MAX40056, a bi-directional current-sense amplifier with an input common-mode range that extends from -0.1Vto +65V together with protection against negative inductive kickback voltages to -5V.

[Distributor] Introduction to the MAX40056F/T/U Bidirectional Current Sense Amplifier with PWM-Rejection

This video provides an introduction to the MAX40056, a bi-directional current-sense amplifier with an input common-mode range that extends from -0.1Vto +65V together with protection against negative inductive kickback voltages to -5V.

Introduction to the MAX40016 4-Decade Current Sense Amplifier with Integrated Rsense Element

This video provides an introduction to the MAX40016, a very wide range current sense amplifier (CSA) with internal sense element that senses from less than 300μA to greater than 3A current range.  

[Distributor] Introduction to the MAX40016 4-Decade Current Sense Amplifier with Integrated Rsense Element

This video provides an introduction to the MAX40016, a very wide range current sense amplifier (CSA) with internal sense element that senses from less than 300μA to greater than 3A current range.  

[Internal] Introduction to the MAX40016 4-Decade Current Sense Amplifier with Integrated Rsense Element

This video provides an introduction to the MAX40016, a very wide range current sense amplifier (CSA) with internal sense element that senses from less than 300μA to greater than 3A current range.  

[Internal] Current Sense Overview

This session provides an overview of current sense amplifiers and an update on the product line.  Includes a brief description of CSAs and an overview of key parts including technical highlights.

[Internal] Introduction to the MAX40201 Dual-Channel, 0-76V Current-Sense Amplifier

This video provides an introduction to the MAX40201, a 0-76V, Dual, Highly Accurate Current Sense Amplifier.

Evaluation Kit for the MAX44298

MAX44298EVKIT

Assesses the MAX44298 precision power monitor with very low offset for low-side monitoring.

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Dual-Channel Current Sense Peripheral Module

MAXREFDES77

Interfaces the MAX44285 dual-channel high-side current-sense amplifier to any system that utilizes Pmod™-compatible expansion ports.

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Evaluation Kit for the MAX44284

MAX44284EVKIT

Demonstrates the high-precision real-time current monitoring of the MAX44284 current-sense amplifier.

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36V, Input Common-Mode, High-Precision, Low-Power Current-Sense Amplifier

MAX44284

This current-sense amplifier offers precision accuracy specifications of 2µV VOS and gain error of 0.05%. It operates with a 1.7V to 5.5V single supply and is optimized for very low power operation with only 21µA of quiescent current.

Learn more ›


Current-Sense Amp Design Resources


Technical Documents

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