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 Amplifiers

Current-sense amplifiers from Maxim feature enhanced input offset voltage specifications. Select from precision, high-voltage, low-power, and space saving 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...

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 instrumentatio...

Low Power 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 o...

Featured Application Notes

Technical Documentation


Technical Documentation

Technical Documents

Showing 10 of View Top 100 Results View All Results

Part Number Title Document Type Date

Monitor System Loads with Current-Sense Amps
4:26 August 24, 2017

DC Motor Current Sensing in a PWM Environment with the MAX40056 Current-Sense Amplifier
10:59 February 14, 2019

Featured Blogs

System Loads Are No Match for This Current-Sense Amplifier

July 03, 2019

Learn how the MAX40056 current-sense amplifier with PWM rejection generates quick, accurate winding current measurements.

MAX9611 High-Side, Current-Sense Amplifiers with 12-Bit ADC and Op Amp/Comparator

The MAX9611/MAX9612 are high-side current-sense amplifiers with an integrated 12-bit ADC and a g...
  • 0V to +60V Input Common-Mode Voltage Range
  • 2.7V to 5.5V Power-Supply Range, Compatible with 1.8V and 3.3V Logic
  • 5µA Software Shutdown Current
  • Integrated 12-Bit ADC
  • 13µV Current-Sense ADC Resolution
  • 500µV (max) Current-Sense ADC Input Offset Voltage
  • 0.5% (max) Current-Sense ADC Gain Error
  • I²C Bus with 16 Addresses
  • Small, 3mm x 5mm 10-Pin µMAX Package
  • -40°C to +125°C Operating Temperature Range

MAX40056F Bidirectional Current Sense Amplifier with PWM-Rejection

The MAX40056 is a bidirectional current-sense amplifier with an input common-mode range that ext...
  • AEC-Q100
  • Fast, 500ns PWM Edge recovery from 500V/µs PWM Edges
  • 60dB AC CMRR Rejection at 50V, ±500V/µs PWM Edges
  • 140dB DC CMRR Rejection
  • -0.1V to +65V Input Voltage Range
  • -5V to +70V Protective Immunity
  • 300kHz, -3dB Bandwidth
  • Multiple Gain Options; 10V/V, 20V/V, 50V/V
  • Internal, 1% Reference for Bidirectional Offset
  • 5µV (Typ) Input Offset Voltage
  • Rail-to-Rail Output
  • 2.02mm x 1.4mm, 8-bump WLP and 8-pin µMAX
  • -40°C to +125°C Temperature Range

MAX40016 4-Decade Current Sense Amplifier with Integrated Current Sense Element

The MAX40016 is a very wide range current sense amplifier (CSA) with internal sense element that...
  • Integrated Current Sense Element Saves The Space and Cost of Expensive Precision Sense Resistors
  • 4-Decade Measurement Range
    • Maintains Accuracy from < 300µA to > 3A
  • Withstands Overloads to 4A
  • Low Voltage Drop Across Sense Element
    • 60mV (Active Mode, 3A Load, WLP Package)
    • 35mV (Low Power Mode, 3A Load, WLP Package)
  • Three Multiplexed Scaling Resistor Outputs Allow Full Dynamic Range while Interfaced to 12-bit ADCs
  • +2.5V to +5.5V Input Supply Voltage Range
  • Low Power Mode Reduces Supply Current to 10μA Max
  • Space-Saving
    • Tiny 1.98mm x 1.3mm, 15-Bump, WLP
    • 4mm x 4mm 16-Pin TQFN
  • -40°C to +125°C Operating Temperature Range

MAX34417 SMBus Four-Channel Very Wide Dynamic Range Power Accumulator

The MAX34417 is a specialized current and voltage monitor used to determine power consumption of...
  • Enables Code Optimization to Minimize Power Consumption in Portable Platforms
    • Four Power Monitors with Wide 86dB Dynamic Range
    • Measures Both Current and Voltage
    • Low Power Consumption
    • Reduced Power Consumption in Slow Accumulation Mode
    • Power-Down Mode
  • Minimizes Processor Overhead with Autonomous Operation
    • Per Channel 56-Bit Power Accumulators Capture 4.55 Hours of Data at 1024 Samples per Second
    • Per Channel 14-Bit Voltage Registers
  • High-Integration Solution Minimizes Parts Count, PCB Space, and BOM Cost
    • Wide Current Common-Mode Range of 0.5V to 20V
    • Low Full-Scale, Current-Sense Voltage of 100mV
    • As low as 5μV Current-Sense Voltage
    • I2C/SMBus Interface with Bus Timeout
    • Temperature Range: -40°C to +85°C
    • Small, 2mm x 2mm Footprint Wafer-Level Package (WLP) with 16 Bumps at 0.4mm Pitch
  • Ease of Development
    • Evaluation Kit with Advanced GUI Available

MAX44285 Dual-Channel, High-Precision, High-Voltage, Current-Sense Amplifier

The MAX44285 dual-channel high-side current-sense amplifier has precision accuracy specification...
  • 2.7V to 76V Input Common Mode
  • Low 12µV (max) Input Offset Voltage
  • Low 0.1% (max) Gain Error
  • Gain Options
    • G = 12.5V/V (MAX44285L)
    • G = 20V/V (MAX44285T)
    • G = 50V/V (MAX44285F)
    • G = 100V/V (MAX44285H)
  • 1mm x 2mm 8-Bump WLP and 8-Pin µMAX Packages

MAX4080 76V, High-Side, Current-Sense Amplifiers with Voltage Output

The MAX4080/MAX4081 are high-side, current-sense amplifiers with an input voltage range that ext...
  • Ideal for High-Voltage Current Monitoring Applications
    • Wide 4.5V to 76V Input Common-Mode Range
    • Independent Operating Supply Voltage
  • High Accuracy and Low Quiescent Current Support Precision Application Requirements
    • ±0.1% Full-Scale Accuracy
    • Low 100µV Input Offset Voltage
    • Three Gain Versions Available
      • 5V/V (MAX4080F/MAX4081F)
      • 20V/V (MAX4080T/MAX4081T)
      • 60V/V (MAX4080S/MAX4081S)
    • 75µA Supply Current (MAX4080)
  • Flexible Current Sensing Supports Monitoring of Charge and Discharge of Batteries
    • Bidirectional (MAX4081) or Unidirectional(MAX4080) ISENSE
    • Reference Input for Bidirectional OUT (MAX4081)
  • Minimizes Required Board Space
    • 8-Pin µMAX Package