as5311 austriamicrosystems, as5311 Datasheet - Page 8

• Manufacturer Part Number: as5311
• Description: High Resolution Magnetic Linear Encoder
• Manufacturer: austriamicrosystems

AS5311
Data Sheet
6 Detailed Description
The different types of outputs relative to the magnet position are outlined in Figure 5 below.
The absolute serial output counts from 0….4095 within one pole pair and repeats with each subsequent pole
pair.
Likewise, the PWM output starts with a pulse width of 1µs, increases the pulse width with every step of 0.488µm
and reaches a maximum pulse width of 4097µs at the end of each pole pair.
An index pulse is generated once for every pole pair.
256 incremental pulses are generated at each output A and B for every pole pair. The outputs A and B are
phase shifted by 90 electrical degrees, which results in 1024 edges per pole pair. As the incremental outputs are
also repeated with every pole pair, a constant train of pulses is generated as the magnet moves over the chip.
Figure 5: AS5311 outputs relative to magnet position
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