The GXS Series is a LEM current sensor IC solution engineered for precise measurement of both AC and DC currents in industrial and automotive settings. This sensor is designed to reject interference from external fields in noisy environments.
Featuring galvanic isolation and advanced signal conditioning, the device delivers accurate current sensing through the primary conductor. The series includes variants optimized for different application requirements, from general-purpose current measurement to high-bandwidth (1 MHz), fast-response sensing suitable for modern power electronics based on SiC and GaN technologies.
The primary conductor (pins 1 and 4) exhibits a relatively low electrical resistance of 1.2 mΩ, ensuring efficiency with minimal power loss.
The GXS Series is capable of measuring currents ranging from 5 to 60 A while maintaining high accuracy over the full operating temperature range of −40°C to +125°C.
Furthermore, galvanic isolation between the primary and secondary sides eliminates the need for additional insulation, helping reduce overall system footprint and cost.
GXS ANF
Key features
- Open loop multi-range current sensor: 5-60A
- Low electrical resistance: 1.2 mΩ
- Supply voltage: 5V or 3.3 V
- Ratiometric output & Fixed output
- High bandwidth: 400kHz
- 1.5us response time
- Galvanic separation between primary and secondary with 4mm of dCI of and 4mm of dCp
- Withstand isolation voltage (VISO): 3000Vrms
- Working Voltage for Basic Isolation: 600Vdc/424Vrms
- Maximum surge isolation withstands voltage (VIOSM): 6kV
- CMTI > 100V/ns
- Working Temperature: -40°C ~ 125°C
Applications
- Solar System
- Servo and Drive
- Automation
- Industrial power supply
- Motor control
- Automotive On Board Charger
- DCDC
- OBC/DC-DC/PTC Heater
- Charging pile
- Power distribution
TECHNICAL DOCUMENTATION
GXS ANF AT A GLANCE
GXS AFE
Key features
- 1 MHz bandwidth with 400 ns
- 5 to 60 A multi-range current measurement
- Low-loss design with 1.2 mΩ primary resistance
- Integrated overcurrent detection (internal and external OCD)
- Up to 4 kA surge capability (IEC 61000-4-5)
- 3000 Vrms isolation, 600 Vdc working voltage, and 6 kV surge withstand voltage
- 3.3 V / 5 V dual supply operation
- −40°C to +125°C operating temperature range
- Compact SOIC8L package
- UL62368 / EN62368 certified, RoHS & REACH compliant
Applications
- OBC/DCDC/PTC Heater
- Photovoltaic System
- Drives and Motor Control
- Automation and Industrial Power Supply
- Charging Pile
- Power Distribution
TECHNICAL DOCUMENTATION
GXS AFE AT A GLANCE
Product name | Nominal | Current | Nominal | Supply Voltage [Uc] | Ratiometric | Temp. |
|---|---|---|---|---|---|---|
| GXS AFE 20-30010A | 66 | 20 | 8 | 3,3V | No | -40 to 125°C |
| GXS AFE 20-50010A | 100 | 29 | 8 | 5V | No | -40 to 125°C |
| GXS AFE 30-30110A | 44 | 30 | 12 | 3,3V | Yes | -40 to 125°C |
| GXS AFE 40-30010A | 33 | 40 | 16 | 3,3V | No | -40 to 125°C |
| GXS AFE 50-50010A | 40 | 50 | 20 | 5V | No | -40 to 125°C |
| GXS AFE 65-30010A | 20.31 | 65 | 26 | 3.3V | No | -40 to 125°C |
| GXS AFE 65-50010A | 30.77 | 65 | 26 | 5V | No | -40 to 125°C |
| GXS AFE 66-31110A | 40 | 66 | 26 | 3,3V | Yes | -40 to 125°C |
GXS Series
STANDARDS & CERTIFICATES
| GXS Series |
|---|
| UL62368 |
| EN62368 |
| IEC 61000-4-5 |
Download our Current Sensor IC Whitepaper
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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.