Sensor and Isolator News, July 8, 2025
TMR Current Sensor Evaluation BoardsNEW!
 
Three Boards
Three new TMR current sensor evaluation boards let you easily evaluate a wide range of noncontact current sensing:
 
ALT023-10E-EVB02 ALT023-10E-EVB03 ALT023-10E-EVB04
1 amp 7 amps 50 amps
 
Better Than Shunts
The current-over-trace configuration provides inherent isolation and is more efficient than a shunt.

Simple Connections
The evaluation boards have a sensor, plus screw terminals for current connections, a standard 0.1-inch header for sensor connections, and a 1 mm pitch card-edge connector.

Succinct Documentation
The boards come with business-card size guides with pinouts and specifications.

Revolutionary Sensor
The boards are based on the revolutionary ALT023-10E TMR magnetometer, which is ideal for noncontact current sensing:
   •  Ultrasensitive
The ALT023 is an order of magnitude more sensitive than GMR or Hall effect, with a remarkable 200 mV/V/mT sensitivity. That translates to one to two volts at full-scale current on a 3.3 or 5 volt supply. The sensors can directly interface to analog front ends or microprocessor analog inputs. The ±1 mT linear range is ideal for noncontact current sensing.
 
   •  High Linearity
With a typical linearity of 0.2%, the ALT023 provides a precise output.
 
   •  Ultraminiature/Low Pin Count
The ALT023 is a TMR bridge sensors that uses just four pins for power and a differential output. The sensor comes in an ultraminiature 2.5 x 2.5 mm DFN.
 
Download the ALT023-10 Datasheet »
 
Boards in Stock
All three boards are in stock for immediate delivery:
 
Evaluation Board
  (click for more information)  
Configuration   Sensing  
Range
  Isolation  
ALT023-10E-EVB02 5 traces on inner-1 layer 0 to 1 A >2500 V
ALT023-10E-EVB03 Trace on inner-1 layer 0 to 7 A >2500 V
ALT023-10E-EVB04   Trace on bottom of board   0 to 50 A >10 kV
 
Demonstration Video
This video shows “bright” applications for noncontact TMR current sensing using all three boards:
 
 
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