Magnetic sensors for minute angle rotation detection

17 October 2007 Analogue, Mixed Signal, LSI

Alps Electric's HGAR series is a range of magnetic sensors with analog linear output for angle detection of internal device rotation mechanisms. Demand for devices able to more precisely detect even minute angle changes has increased owing to recent advances in internal device rotation mechanisms that feature smooth, accurate movement as well as to the need for accurate transmission of information to devices, such as human operation. The HGAR sensors are compact, measuring only 2,00 mm x 1,50 mm x 0,75 mm. In addition, through the use of non-contact sensors, output disturbance from the sliding noise of conventional resistance sensors has been eliminated. As such, the product realises an improved and nearly straight-line output with high S/N ratio. Furthermore, while resistance sensor systems normally comprise approximately 8-bit angle resolution, the HGAR series system realises four times this measure with 10-bit angle resolution. The HGAR series has low current consumption and, owing to the application of a non-contact sensor rather than a resistance sensor, is highly resistant to decay, thereby contributing to a long operating life.

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