What limits the resolution of OnAxis™ magnetic encoders?

The maximum achievable resolution for magnetic encoders based on the Hall effect is limited by a number of factors. The main source for noise is electrical noise from the Hall sensors themselves.

Peak noise for a well-optimised system is normally in the range of 0.02°. This limits the resolution for magnetic encoders with Hall sensors to 13 bits (8192 counts per revolution).

13 bit resolution

360° / 8192 = 0.04°

higher than sensor noise

14 bit resolution

360° / 16384 = 0.02°

equal to sensor noise

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