High-performance position sensors immune to external stray field

In stock at Digi-Key, ams offers its wide range of high-performance position sensors suitable for industrial, medical, robotics, automotive, and consumer applications. Their patented technology makes all position sensors immune to external stray field, yielding to higher robustness, lower system cost (no magnetic shield needed) and adherence to the most stringent safety requirements. The AS5311 is an incremental position sensor for linear and rotary off-axis applications based on contactless magnetic sensor technology. To measure position and motion a multi-pole magnet strip or ring has to be used. There are 4096 pulses (12-bit) per 2mm pole pair length on the standardised quadrature output interface with an index pulse (=ABI-interface), offering a maximum speed of 650mm/sec in Incremental mode. A multi-pole magnetic strip or ring, with a pole length of 1mm, is required to sense the rotational or linear motion. The magnetic strip is placed above the IC at a distance of typically 0.3mm. The absolute measurement provides instant indication of the magnet position within one pole pair, with a resolution of 488nm per step (12-bit over 2mm). This digital data is available as a serial bit streamed as a PWM signal. Furthermore, an incremental output is available with a resolution of 1.95µm per step. An index pulse is generated once for every pole pair (once per 2 mm).The travelling speed in incremental mode is up to 650 mm/second. An internal voltage regulator allows the AS5311 to operate at either 3.3V or 5V supplies. Depending on the application, the device accepts multi-pole strip magnets as well as multi-pole ring magnets, both radial and axial magnetise.