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Current Sensor ICs - Integrated Current Sensors | LEM

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Current Sensor ICs - Integrated Current Sensors | LEM Skip to main content EN JP CN EN JP CN Check Stock Career Investors Contact Products Applications Support About Lem Search Current Sensors 45-90 A 90-180 A 187.5-375 A 375-750 A 750-1500 A 1500-3000 A 3000-6000 A 6000-12000 A 12000-24000 A Other value All Current Sensors Voltage Sensors 25-50 V 50-100 V 100-200 V 200-400 V 400-800 V 800-1600 V 1600-3200 V 3200-6400 V All Voltage Sensors Integrated Current Sensors GO Series HMSR Series GXS Series GXN Series GXM Series All Integrated Current Sensors Rogowski Coil ART Series ARU Series ARH Series INTEGRATORS FOR ROGOWSKI COILS Energy Meters DCES DCBM 400 & 600 DCBM 100 TEMA4G EM4T II All Energy Meters Automotive Battery Management EV Chargers Automotive Motor Control Smart Grid Welding Automation Drives High Precision Power Supplies Renewable Energies Trackside Traction After Sales & RMA Merchandize authorization RMA Categories All after sales and RMA Downloads Application Notes Brochures Certificates All Downloads Technical FAQs General All Technical FAQs Company Information History Board of Directors & Committees Organization Values Compliance Sustainability Our locations All Company Information Quality & Environment Quality Environment All Quality & Environment Our partners Become a LEM Supplier Our general terms & conditions Our distributors News & Events All News & Events What do you need ? Product information Check Stock Global information GO EN JP CN EN JP CN Products Current Sensors Voltage Sensors Integrated Current Sensors Rogowski Coil Energy Meters Applications Automotive Battery Management EV Chargers Automotive Motor Control Smart Grid Welding Automation Drives High Precision Power Supplies Renewable Energies Trackside Traction Support After sales and RMA Downloads Technical FAQs About Lem Company Information Quality & Environment Suppliers News & Events Check Stock Career Investors Contact What do you need ? Product information Check Stock Global information GO Home lem_current_page : Integrated current sensors INTEGRATED CURRENT SENSORS Current sensors have to be smaller, smarter, cheaper. LEM’s R&D is actively developing a range of Current Sensor IC to reduce the footprint of the current sensing function and simplify the integration of current measurement in a wide range of applications in automotive, industrial, or residential.

Product List Contact Sales At low currents, shunts remain a viable solution, but they have isolation challenges and cannot provide the current sensing function alone. They require amplifiers and/or analogue-digital conversion (ADC) for signal treatment of the measured voltage drop.

Thanks to technical progress in semiconductor manufacturing and packaging, it is now possible to integrate all the stages of a current sensor in 1 single package. Current flows through the device, the induced magnetic field is sensed by two Hall-effect plates, the operation is contactless and provides inherent galvanic isolation, the voltage signal is treated inside an application-specific integrated circuit (ASIC) and this very ASIC also allows to add other ad hoc features.

As a leader in electrical measurement for 50 years, LEM is constantly developing new technologies to fit customers evolving needs. The company is now building a complete Current Sensor ICs range to serve evolving needs as well as new applications.

GO series Standard package and small footprintCost effectiveA perfect compromise for small drives, robots, solar inverters, e-bikes etc.Main features1% accuracy at 25°CLow drifts (offset: 75uV/°C, Gain: 200ppm)17mA power consumptionFixed and ratiometric outputView more

HMSR series SOIC 16 compatible footprintGreat accuracy: Typical accuracy is 0.5% over temperature and the measurement rangeSmall hysteresis of Strong immunityMain featuresCurrent range 6-30 Arms continuous at 125°C (75 A peak)Isolation: 4,950 VrmsGlobal accuracy -25°C: 0.78 %Global accuracy -Over T° C: 1.4 %View more

GXS Series Standard package and small footprint (SOIC 8)Cost effectiveHigh bandwidthMain featuresOpen loop multi-range current sensor: 5-60AIsolation: 3000VrmsLow electrical resistance: 1.2 mΩFixed and ratiometric outputView more

GXN Series High surgeHigh isolationFast Over current detectionFixed and Ratiometric outputMain featuresOpen loop multi-range current transducer: 10~100ALow electrical resistance: 0.85 mΩIsolation: 5000VrmsView more

GXM Series Superior current and surge capabilities (20kA)High accuracy, low resistanceSOIC 10L packageMain featuresOpen loop multi-range current sensor: 50~200ALow electrical resistance: 0.27 mΩIsolation: 5000VrmsView more

Download Technical Documentation Download Selection Guide More about LEM’s Current Sensor IC What is an Integrated Current Sensors?Current Sensors ICs are Hall-effect based sensors that integrate the current conductor, the sensing elements, the signal treatment die, some dedicated features such as fault detections, and the isolation, all in one single package to reduce the footprint of the current sensing function.

Why use a Current Sensor IC?For low current, shunts remain an alternative, but they have isolation issues and require additional electronics parts to fully complete the current sensing function. Current Sensor ICs are highly integrated products that work seamlessly in every application. At LEM they are the result of leveraging 50 years of fundamental electrical knowledge, customers applications understanding and product innovation. Isolated current sensors are the most optimized pieces of hardware to sense the current in every environment.

What is the technology used in LEM’s Current Sensor IC?Current Sensor ICs can use Hall-effect technology for current sensing.

Hall-effect sensing is one way to do contactless measurement of the current-induced magnetic field. A Hall cell is a sensing element that converts a change in the magnetic field into a change of its resistance. When a constant current goes through the hall cell, it will give a voltage output change proportional to the magnetic field.

Contrary to traditional Hall-effect current sensors, integrated current sensors are not using a ferrite core around the current conductor and the sensing elements to concentrate the magnetic field. They are using differential measurement.

Thanks to differential measurement, it is possible to get rid of the ferrite core while keeping a good response to external fields perturbations. Differential measurement uses 2 sensing elements (the Hall cells). They both receive the magnetic field to be measured, one with a positive factor, and the other with a negative factor. They also receive any external fields with the same incidence. When making the difference between the fields seen by the 2 cells, the unwanted fields cancel each other.

5 advantages of LEM Isolated Current Sensors as current sensorsCurrent sensors IC take advantage of differential measurement by not using a ferrite core. Getting rid of the magnetic core offers several benefits for embedded applications:

Reduce costIncreases power density on sensing side – up to 75A in 800V applications for LEM Isolated Current Sensors products.Current measure is not subject to offset from magnetic hysteresis.Operating temperature not limited to the Curie temperature above which a ferrite can experience demagnetization (105°C), but rather by the maximum junction temperature of the device.Frequency and bandwidth are not limited by the inherent saturation of the magnetic element of the core.What are the applications where Sensors IC can make the difference?Current Sensor ICs are suitable for a wide range of applications where accurate control, efficiency and protection is needed. They allow designers to realize the current sensing function with a plug-and-play approach, with virtually all their challenges solved using only one part.

In DC/AC inverters and motors drives for example, LEM GO and HMSR can increase compactness and simplify design :

Low power loss integrated sensors can be put closer to heat sources such as microcontroller and transistorsIntegrated isolation simplifies PCB layoutBuilt-in OCD makes sure the microcontroller can put the system in safe state with minimal delay. Video Exploring our Integrated Current Sensors range Standards and certificates GO Series HMSR Series IEC 61800-5-1: 2007 IEC 61800-5-1: 2007 IEC 62109-1: 2010 IEC 62109-1: 2010 IEC 62368-1:2018 (supersedes IEC 60950-1: 2005) IEC 60950-1: 2005 UL 1577: 2014 UL 1577: 2014 (pending) UL 62368: 2019.   Download our Current Sensor IC Whitepaper Explore the world of integrated current sensors with our comprehensive whitepaper. 

As electronics become more powerful and compact, isolated current sensors offer a solution for accurate, reliable current sensing in space-constrained applications.

This guide provides an in-depth look into the efficient and safe applications of these sensors, reflecting LEM's commitment to innovation and sustainability.

Download the whitepaper

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