AS5040 View Datasheet(PDF) - austriamicrosystems AG
Part Name
Description
MFG CO.
'AS5040' PDF : 61 Pages View PDF
AS5040 − Electrical Characteristics
Figure 14:
Magnetic Input Specification
Magnetic Input Specification
Operating conditions: Tamb = -40°C to 125°C, VDD5V = 3.0V to
3.6V (3V operation) VDD5V = 4.5V to 5.5V (5V operation) unless
otherwise noted.
Two-pole cylindrical diametrically magnetized source:
Symbol Parameter
dmag
tmag
Diameter
Thickness
Bpk
Magnetic input
field amplitude
Boff
Magnetic offset
Field non-linearity
fmag_abs
fmag_inc
Input frequency
(rotational speed
of magnet)
Disp
Displacement
radius
Chip placement
tolerance
Recommended
magnet material
and temperature
drift
Min Typ Max Unit
Note
4
6
2.5
mm Recommended magnet: Ø 6mm x
mm 2.5mm for cylindrical magnets
Required vertical component of the
45
75
mT
magnetic field strength on the die’s
surface, measured along a concentric
circle with a radius of 1.1mm
± 10 mT Constant magnetic stray field
5
% Including offset gradient
10
Hz
Absolute mode: 600 rpm @ readout of
1024 positions (see Figure 36)
Incremental mode: no missing pulses
500
Hz at rotational speeds of up to 30000
rpm (see Figure 36)
0.25
0.485
Max. X-Y offset between defined IC
package center and magnet axis (see
mm Figure 41)
Max. X-Y offset between chip center
and magnet axis.
±0.23 5
mm
Placement tolerance of chip within IC
package (see Figure 43)
-0.12
-0.035
NdFeB (Neodymium Iron Boron)
%/K
SmCo (Samarium Cobalt)
ams Datasheet
[v2-12] 2017-Jun-20
Page 11
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