Angle Sensor Provides Quadrature/Large Signals Without Amplification

The AAT001-10E angle sensor emerges as the first commercial sensor to use tunneling magnetoresistance (TMR), which produces a much larger signal than giant magnetoresistance (GMR). Reportedly, TMR is a spintronic quantum effect that produces a dramatic resistance change in a normally insulating layer, depending on the magnetic field, and thus the predominant electron spin in a free layer. The AAT001-10E has four TMR elements configured as an angle sensor with full quadrature sine and cosine outputs. An external bar or split-pole magnet provides a saturating magnetic field of 30 to 200 Oersteds in the plane of the sensor. Available in a six-pin, 2.5 mm x 2.5 mm TDFN package, price for the AAT001-10E angle sensor is $1.94 each/1,000. Split-pole ferrite magnets for use with the sensors are available for $1.15 each/1,000. NVE CORP., Eden Prairie, MN. (800) 467-7141.