Integrated linear Hall encoder reaches submicron resolution

Integrated linear Hall encoder reaches submicron resolution

Used as an alternative to optical encoders, the AS5311 Hall-effect-sensor-based linear magnetic encoder is presented as the first to offer submicron resolution. For linear motion sensing, a multipole magnetic strip is used, and for rotary motion sensing, the magnetic strip is replaced by a multipole magnetic ring. For applications like these, an incremental output with a resolution of 10 bits per pole pair and a travelling speed up to 650 mm/s is available.

As an example, for a multipole magnetic ring with a diameter of 41.7 mm, a resolution of 16 bits (65.536 steps/rev) can be achieved. In conjunction with a 2-mm pole-pair magnetic strip, the part provides a 1.95-μm-resolution signal at its incremental output and a 488-nm-resolution signal at its serial output. Housed in a 20-lead TSSOP package, the part operates at either 3.3 or 5 V and from −40° to 125°C. ($5.23 ea/1,000 — available now.)

austriamicrosystems , Unterpremstaetten , Austria
Josef Janisch 011-43-0-3136-500 5464

http://www.austriamicrosystems.com