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Current-Sense Amplifiers

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 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 Documents
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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.
MAX40056F Bidirectional Current Sense Amplifier with PWM-Rejection
The MAX40056 is a bidirectional current-sense amplifier with an input common-mode range that ext...
- 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 WLP-8 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
MAX40056F Bidirectional Current Sense Amplifier with PWM-Rejection
The MAX40056 is a bidirectional current-sense amplifier with an input common-mode range that ext...
- 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 WLP-8 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