TMR4101 - High Precision Analog Magnetic Scale Sensor
The TMR4101 magnetic scale sensor contains two push-pull half-bridges, each consisting of two high-sensitivity tunnel magnetoresistance (TMR) elements. The layout of the TMR elements matches the width of the magnetic poles. When the sensor moves along the length of the scale, the sensor outputs two quadrature sine wave signals, each corresponding to the width of a pair of magnetic poles. By decoding these two sine wave signals, the relative displacement between the chip and the scale can be accurately measured.
The TMR4101 magnetic scale sensor chip uses a small package DFN4L (1.32 mm × 0.66 mm × 0.3 mm), which reduces the requirements for chip installation, making the structural design of the system more flexible and convenient for assembly in narrow spaces.
Features:
- Tunneling magnetoresistance (TMR) technology
- Analog voltage outputs for A and B phases
- High sensitivity
- Detects magnetic pole pitch of 0.4 mm
- Wide operating voltage range
- Allows for larger air gap
- Good temperature stability
- RoHS & REACH compliant
Applications:
- Camera Autofocus System
- Magnetic scale and magnetic encoder
- Gear motion speed and direction detection
- Linear and angular velocity sensing
- Linear and curved displacement measurement
