AS5040

Data Sheet

www.austriamicrosystems.com

Revision 2.10

14 - 33

Figure 9: Hysteresis Window for Incremental Outputs

Magnet Position

Hysteresis:

0.7°

X+2

Incremental

Output

Indication

Clockwise Direction

Counterclockwise Direction

X+4

X

X

X +2

X+4 X +5

X +3

X+1

X+1

X+3

9

Pulse Width Modulation (PWM) Output

The AS5040 provides a pulse width modulated output (PWM), whose duty cycle is proportional to the measured

angle:

1025 −

+

⋅

=

off

on

on

t

t

t

Position

The PWM frequency is internally trimmed to an accuracy of

±5% (±10% over full temperature range). This tolerance

can be cancelled by measuring the complete duty cycle as shown above.

Figure 10: PWM Output Signal

Angle

359.65 deg

(Pos 1023)

0 deg

(Pos 0)

1µs

1025µs

1024µs