austriamicrosystems has introduced a range of 3-dimensional Hall encoders.
The 3D architecture was developed in co-operation with Fraunhofer Institute for Integrated Circuits IIS in Germany using patented technology called HallinOne.
“The strength of this technology is the true 3D measurement of magnetic field components,” said Marcel Urban, product manager magnetic encoders at austriamicrosystems.
“Accurately calibrated lateral and vertical Hall sensors are used to increase the overall performance. By using two 3D pixels cells in a differential measurement approach, the absolute linear position measurement range is extended to 40mm,” said Urban.
The AS540x series uses two “pixel-cells” in a differential mode to improve immunity against external influences like magnetic stray fields.
There is also on-chip an EEPROM.
The HallinOne technology has already been used in ASIC-based applications, this is the standard product to incorporate the design.
By using a simple two pole magnet, the absolute position information of the magnet is directly accessible over a SPI interface for module or as a PWM interface for remote applications.
The AS540x magnetic encoder series is operational over an ambient temperature range from -40°C up to 150°C
For more detail: Electronica: off-axis working with 3D Hall sensor