AD2S1200: interpreting the output velocity information

Document created by analog-archivist Employee on Feb 23, 2016
Version 1Show Document
  • View in full screen mode

When accessing the velocity information. ie /RDVEL pin is low. What are the
units that the velocity is measured in? And what are the limits that the device
can read?


The digital velocity output of the AD2S1200 represents the velocity of the
resolver shaft rotating in either a clockwise or anti-clockwise direction. The
digital output is in twos complement format and is scaled to a maximum velocity
of +/-1,000rps [60,000rpm] i.e. when reading back velocity 800h will represent
-1,000rps and 7FFh will represent +1,000rps. Each bit is equivalent to 1000rps
/ 2048 i.e. 0.488rps.