as5311 austriamicrosystems, as5311 Datasheet - Page 6

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

sampling
AS5311
Data Sheet
5.4 Magnetic Input Specification
Operating conditions: T
otherwise noted.
Two-pole cylindrical diametrically magnetised source:
Note
samples increases. The travelling distance between two subsequent samples can be calculated as:
5.5 Electrical System Specifications
Operating conditions: T
otherwise noted.
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Pole length
Pole pair length
Magnetic input field
amplitude
Magnetic offset
Magnetic field
temperature drift
Magnetic input field
variation
Linear travelling speed
Displacement
Vertical gap
Recommended magnet
material and
temperature drift
Resolution, absolute outputs
Resolution, incremental
outputs
Integral non-linearity
(optimum)
Integral non-linearity (over
temperature)
Differential non-linearity
Transition noise
Power-on reset thresholds
On voltage; 300mV typ.
hysteresis
Off voltage; 300mV typ.
hysteresis
1)
: There is no upper speed limit for the absolute outputs. With increasing speed, the distance between two
Parameter
_
Parameter
dist
=
v
fs
amb
amb
= -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5 - 5.5V (5V operation) unless
= -40 to +125°C, VDD5V = 3.0~3.6V (3V operation) VDD5V = 4.5~5.5V (5V operation) unless
Symbol
Vabs
Disp
Z
t
B
B
Lp
B
mag
Dist
where: sampling_distance = travelling distance between samples in mm
pk
off
tc
Symbol
RES
INL
RES
INL
DNL
V
V
TN
on
off
temp
opt
abs
Min
inc
v = travelling speed in mm/sec
10
fs = sampling rate in Hz
Min
1.37
1.08
-0.19
-0.12
Typ
0.5
0.3
1
2
Typ
2.2
1.9
12
10
Revision 1.00
Max
650
± 5
0.2
40
±2
±0.97
± 5.6
Max
± 10
0.6
2.9
2.6
Unit
mm/
%/K
%/K
mm
mm
sec
mm
mm
mT
mT
%
(see 5.5 below)
polepair
polepair
Recommended magnet: plastic or rubber
bonded ferrite or NdFeB
Required vertical component of the magnetic
field strength on the die’s surface
Constant magnetic stray field
Recommended magnet: plastic or rubber
bonded ferrite or NdFeB
Including offset gradient
Incremental output: 1024 steps / polepair
including interpolation
Max. shift between defined Hall sensor
center and magnet centerline (see Figure
17); depends on magnet geometries
Package to magnet surface;
depends on magnet strength
Plastic or rubber bonded Ferrite
Plastic or rubber bonded Neodymium
(NdFeB)
RMS
Unit
bit /
bit /
µm
µm
µm
µm
V
0.488 um/step (12bit / 2mm pole
pair)
1.95 um/step (10bit / 2mm pole
pair)
Maximum error with respect to the
best line fit. Ideal magnet
T
Maximum error with respect to the
best line fit. Ideal magnet
T
10bit, no missing codes
1 sigma
DC supply voltage 3.3V (VDD3V3)
DC supply voltage 3.3V (VDD3V3)
amb
amb
=25 ° C.
= -30 to +70 ° C.
Note
1)
Note
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