Two new magnetic sensors are in pre-release mode at Monolithic Power, a prolific developer of magnetic sensing integrated circuits. One is a fully differential magnetic digital angle sensor with stray-field immunity for automotive engineers. The other is a precision, magnetic absolute angle position sensor. Both extract the angle from magnetic field differences at several sensor locations on the IC, a differential method which eliminates the contribution of parasitic magnetic fields.
Shown above, the MAQ79010FS is a contactless, precision, magnetic, absolute angle position sensor optimized for automotive applications. The angle is extracted from magnetic field differences at several sensor locations on the IC. This differential method eliminates the contribution of parasitic magnetic fields and is well-suited for sensors positioned at the end-of-shaft with a simple target magnet. Designed for fast data acquisition and processing, it provides accurate angle measurement at speeds from 0 rpm to more than 100,000rpm.
The MA900 is a fully differential, magnetic digital angle sensor with stray-field immunity also, well suited for sensors positioned at the end-of-shaft with a simple target magnet. With equivalent speed, it features magnetic field strength detection with configurable thresholds to sense the magnet proximity, which can be used to sense the knob’s axial position or for diagnostics. On-chip non-volatile memory provides storage for setting parameters, such as the reference zero angle position, ABZ encoder settings and configuration of three-dimensional modeling (UVW) emulation. See www.monolithicpower.com.
