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.
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.
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.
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).
Current-Sense Amp Featured Products
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.
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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.
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.
DC Motor Current Sensing in a PWM Environment with the MAX40056 Current-Sense AmplifierDC 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.
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Precision Uni and Bidirectional, Current-Sense AmplifiersMAX9918,MAX9918/MAX9920
These ICs are single-supply, high-accuracy current-sense amplifiers with a high input common-mode range that extends from -20V to +75V.
36V, Input Common-Mode, High-Precision, Low-Power Current-Sense AmplifierMAX44284
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.
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Current-Sense Amp Design Resources
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