The HMSR Series is the latest range of Integrated Current Sensors by LEM. It was designed for our customers to get all the benefits from a Current Sensor IC but with a new isolation concept that allows unique robustness.
HMSR allows 4.95kV guaranteed and characterized up to 5.66kV in laboratory. The series has a pre-mold design to isolate the primary bar and a special footprint to allow 8mm dCp/dCI on the landing pad. The integrated micro core inside the HMSR makes it very immune to external magnetic field and great accuracy. It is ideal for applications in solar DC side, chargers, etc.
HMSR SMS
Key features
- Open loop multi-range current sensor
- Voltage output
- Double overcurrent detection
- Single power supply +5 V
- Galvanic separation between primary and secondary
- Low power consumption
- Compact design for surface mount PCB mounting
- Factory calibrated
- High bandwidth, very low loss magnetic core
Applications
- Small drives
- HVAC inverters
- Appliances
- Solar inverters
TECHNICAL DOCUMENTATION
HMSR SMS at a glance
Product name | Order Parts | Order | Nominal | Current | Nominal | Supply Voltage [Uc] | Ratiometric | Temp. range [°C] |
|---|---|---|---|---|---|---|---|---|
| HMSR 6-SMS | 133,33 | ± 15 | ± 6 | 5V | No | -40 to 125°C | ||
| HMSR 8-SMS | 100 | ± 20 | ± 8 | 5V | No | -40 to 125°C | ||
| HMSR 10-SMS | 80 | ± 25 | ±10 | 5V | No | -40 to 125°C | ||
| HMSR 15-SMS | 53,33 | ± 37.5 | ±15 | 5V | No | -40 to 125°C | ||
| HMSR 20-SMS | 40 | ± 50 | ± 20 | 5V | No | -40 to 125°C | ||
| HMSR 30-SMS | 26,67 | ± 75 | ± 30 | 5V | No | -40 to 125°C |
HMSR DA
HMSR DA is the 1st integrated current sensor with a Sigma Delta bitsream output. Capable of reaching up to 13 bits of effective resolution, the HMSR DA will be the perfect fit for your low noise current sensing needs.
Key features
- Replaces shunt and digital isolator for reduced cost and footprint
- Offers efficient performance for servo drives, robotics and other high precision applications
- Sigma Digital bitstream output with 10 MHz clock in or out
- High resolution with an effective number of bits (ENOB) 11 to 13 bits
- Different output modes: Single ended CMOS, Differential RS422, LVDS
- Fast internal OCD of 2 µs
Applications
- Small drives
- HVAC Inverters
- Appliances
- Solar Inverters.
Technical documentation
HMSR DA at a glance
| Product name | Nominal Sensitivity [%/A] | Current measurement range [Apeak] | Nominal current [Arms]1 | Supply Voltage [Uc] | Output Mode | Temp. range [°C] |
|---|---|---|---|---|---|---|
| HMSR DA 10/4– 50000 | 4 | ± 10 | ±4 | 5V | 2W CMOS CLK Out | -40 to 125°C |
| HMSR DA 10/4 – 54000 | 4 | ± 10 | ±4 | 5V | 4W RS 422 CLK Out | -40 to 125°C |
| HMSR DA 15/6 – 50000 | 2,666 | ± 15 | ±6 | 5V | 2W CMOS CLK Out | -40 to 125°C |
| HMSR DA 15/6 – 54000 | 2,666 | ± 15 | ±6 | 5V | 4W RS 422 CLK Out | -40 to 125°C |
| HMSR DA 25/10 – 50000 | 1,6 | ± 25 | ±10 | 5V | 2W CMOS CLK Out | -40 to 125°C |
| HMSR DA 25/10 – 54000 | 1,6 | ± 25 | ±10 | 5V | 4W RS 422 CLK Out | -40 to 125°C |
| HMSR DA 75/30 – 50000 | 0,533 | ± 75 | ±30 | 5V | 2W CMOS CLK Out | -40 to 125°C |
| HMSR DA 75/30 – 54000 | 0,533 | ± 75 | ±30 | 5V | 4W RS 422 CLK Out | -40 to 125°C |
HMSR DA, the first ICS with Sigma Delta bitstream ouput
Standards & Certificates
| HMSR Series |
|---|
| IEC 61800-5-1: 2007 |
| IEC 62109-1: 2010 |
| IEC 60950-1: 2005 |
| UL 1577: 2014 (pending) |
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.