as5045 austriamicrosystems, as5045 Datasheet - Page 19

• Manufacturer Part Number: as5045
• Description: 12-bit Programmable Magnetic Rotary Encoder
• Manufacturer: austriamicrosystems

AS5045 12-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER
14.4.4
(operating conditions: T
14.4.5
(operating conditions: T
14.5
(operating conditions: T
Two-pole cylindrical diametrically magnetised source:
Revision 1.2, 03-Oct-06
Parameter
Diameter
Thickness
Magnetic input field amplitude
Magnetic offset
Field non-linearity
Input frequency
(rotational speed of magnet)
Displacement radius
Eccentricity
Recommended magnet
material and temperature drift
Parameter
High level output voltage
Low level output voltage
Output current
Parameter
High level output voltage
Low level output voltage
Output current
Tri-state leakage current
CMOS Output: PWM
Tristate CMOS Output: DO
Magnetic Input Specification
am b
am b
am b
= -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless otherwise noted)
= -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless otherwise noted)
= -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless otherwise noted)
Symbol
f
mag_abs
Disp
d
t
Ecc
B
B
mag
mag
pk
off
Min
2.5
45
4
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Symbol
Symbol
V
V
V
V
I
I
OZ
I
OH
OL
O
OH
OL
O
-0.12
-0.035
Typ
6
VDD5V –0.5
VDD5V-0.5
Max
± 10
Min
2,44
0,61
0.25
100
Min
75
5
%/K
Unit
mm
mm
mm
µm
mT
mT
Hz
%
VSS+0.4
VSS+0.4
Max
Max
Note
Recommended magnet: Ø 6mm x 2.5mm for
cylindrical magnets
Required vertical component of the magnetic field
strength on the die’s surface, measured along a
concentric circle with a radius of 1.1mm
Constant magnetic stray field
Including offset gradient
146 rpm @ 4096 positions/rev.; fast mode
36.6rpm @ 4096 positions/rev.; slow mode
Max. offset between defined device center and
magnet axis (see Figure 17)
Eccentricity of magnet center to rotational axis
NdFeB (Neodymium Iron Boron)
SmCo (Samarium Cobalt)
4
2
1
4
2
Unit
Unit
mA
mA
µA
mA
mA
V
V
V
V
Note
VDD5V: 4.5V
VDD5V: 3V
Note
VDD5V: 4.5V
VDD5V: 3V
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