AS5311-ASST austriamicrosystems, AS5311-ASST Datasheet - Page 10

• Manufacturer Part Number: AS5311-ASST
• Description: IC ENCODER LINEAR 20-TSSOP
• Manufacturer: austriamicrosystems
• Type: Linear, Rotary Encoder - Programmabler

Specifications of AS5311-ASST

• Voltage - Supply: 3 V ~ 3.6 V, 4.5 V ~ 5.5 V
• Current - Supply: 21mA
• Current - Output (max): 4mA
• Output Type: Digital, PWM, 12-Bit Serial
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 20-TSSOP (0.173", 4.40mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensing Range: -
• Features: -

AS5311
Data Sheet
6.6.2
Operating conditions: T
otherwise noted.
7 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
www.austriamicrosystems.com
PWM frequency
Minimum pulse width
Maximum pulse width
Parameter
Pulse Width Modulation Output
amb
= -40 to +125°C, VDD5V = 3.0~3.6V (3V operation) VD D5V = 4.5~5.5V (5V operation) unless
Symbol
PW MAX
PW MIN
f PWM
3892
Min
232
220
0.9
4097
Typ
244
244
1
Revision 1.04
4301
Max
256
268
1.1
Unit
Hz
µs
µs
Signal period = 4098µs 5% at Tamb =
25° C
= 4098µs 10% at Tamb = -40 to +125° C
Position 0d =0µm
Position 4095d = 1999.5µm
Note
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