AEAT-601B
Incremental Magnetic Encoder
Data Sheet
Description
Avago Technologies’ Incremental Magnetic Encoder pro-
vides an integrated solution for angular detection within
a complete 360° rotation. The use of magnetic technol-
ogy for motion control and sensing activities eliminates
mechancial contact and enables this device to be free
from mechanical wear and tear. Three-channel output
provides an additional index channel for every full rota-
tion or revolution of 360°. An additional advantage is that
the encoders upper rotational speed limit is typically only
limited by the application's bearing speed.
Features
x
Resolution of 256 counts per revolution (CPR)
x
Contactless sensing technology
x
Wide temperature range from -40q to 125qC
x
3-channel output
x
Single 5V supply
x
Easy assembly and no signal adjustment required
x
Direct connectivity through cable output
x
RoHS compliant
Exploded View
Applications
x
Speed detection
x
Knob control
x
Rotary encoders
Table 1. Absolute Maximum Ratings
[1, 2]
Parameter
DC Supply Voltage at pin V
DD
= 5V
Input Voltage
Storage Temperature
Symbol
V
DD
V
i
T
stg
Limits
-0.3 to + 7
-0.3 to V
DD
+0.3
-40 to 125
Units
V
V
qC
Notes:
1. Stresses greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is stress rating only and
functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not
implied.
2. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
Table 2. Recommended Operating Condition
Parameters
DC Supply Voltage at pin V
DD
= 5V
Operating Temperature
Rotational Speed :
Symbols
V
DD
T
amb
Mechanical (max)
Electrical (max)
Values
+4.5 / +5.5
40/125
12000
7000
Units
V
°C
RPM
RPM
Notes
Notes:
1. Under recommended mounting and tolerance, and mechanical shaft play, the incremental encoder's quadrature output (quater cycle phase shift
between Channel-A and Channel-B) is always maintained. The dynamic performance of the encoder output are depicted in the figures under
Encoding Characteristic.
2. The magnetic incremental output has a fixed hysteresis of 0.7 degrees for all different CPR options (equivalent to 2 quadrature counts at 256 CPR
or 0.5 quadrature count at 64 CPR).
3. The quadrature decoding of both the Channel-A and Channel-B would ensure that the incremental counts are maintained even when there is
transition noise due to fluctuation of the magnetic field strength.
Table 3. DC Characteristics
DC Characteristics over Recommended Operating Range, typical at 25
qC
Values
Parameter
V
DD
Supply Current
Output High Voltage
Output Low Voltage
Output Current
Symbol
I
DD
V
OH
V
OL
I
O
Condition
Min
V
DD
-0.5
Typ.
16
Max
20
VSS+0.4
4
Units
mA
V
V
mA
Notes
V
DD
pin = 4.5V
2
AEAT-601B Performance Characteristics
State Error
100
90
80
70
60
°e
50
40
30
20
10
0
0
2000
4000
RPM
6000
256CPR
64CPR
100
90
80
70
60
°e
50
40
30
20
10
0
8000
0
2000
4000
RPM
6000
Cycle Error
256CPR
64CPR
8000
Duty Error
80
70
60
°e
50
40
30
20
10
0
0
2000
4000
RPM
6000
8000
256CPR
64CPR
Table 4. Encoding Characteristics
Encoding Characteristics over Recommended Operating Range, typical at 25
qC
over speed range.
Parameter
Index Pulse Width
Symbol
Po
Typ.
150
Units
qe
3
Package Dimensions
Mounting Consideration
#
1
150
mm
2
3
4
wire
5
6
7
Parameter
Maximum Shaft
Axial Play
Maximum Shaft TIR
Maximum
Mechanical Speed
Shaft Diameter
Moment Inertia
Shaft Length
Mounting Screw
Size
Recommended
screw torque
Encoder base
plate thickness
Bolt Circle
Unit
mm *
mm *
RPM
mm
g-cm2
mm
mm
Values
± 0.08
0.05
12,000
6 +0 / -0.01
0.104
8.5 ± 1.0
M2 x 0.4 x 8
(socket head cap screw,
head Ǿ3.8 ± 0.18mm)
0.6
2
± 0.13
23.0 mm
8
9
10
lb.inch
mm
mm *
19.0
mm
* Recommended to follow these limits for optimum performance
Figure 1. Package and recommended mounting dimension
Mounting Base
Optional - Centering Jig
(Refer to Application Note for details)
Optional - Base Gap Setting Plate
(Refer to Application Note for details)
Figure 2. Accessories - HEDS-8934, A set of optional centering and gap setting jigs (available for purchase separately)
4
Output Waveform
P
C
Key:
S - State
P - Pulse
C - Cycle
I - index
B
S1
S2
S3
S4
φ
A
360
°
e
Po
I
ΔI
Note: Channel-B leads Channel-A at 90
qe
at clockwise direction (top view of the encoder) and Channel-A leads Channel-B at 90
qe
at anti-clockwise
direction.
Figure 3. Incremental output waveform
Electrical Connections
23.0
Pig Tail
6.0
26AWG
150
±10
19.0
FRONT - 1
Pin
5V
(Yellow)
Index (Black)
B (Orange)
1
2
3
4
5
RIGHT - 1
Symbol
5V
Gnd
Ch A
Ch B
Index
Color
Yellow
Red
Brown
Orange
Black
GND (Red) A (Brown)
TOP - 1
Figure 4. Electrical Connections
Ordering Information:
AEAT-601B-F06 256CPR, 3 Channel Incremental, 6mm Hub Size
HEDS-8934
Alignment tools set
Note: Resolution options of 32,64 and 128CPR is also available.
Contact factory for these options.
For product information and a complete list of distributors, please go to our web site:
www.avagotech.com
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries.
Data subject to change. Copyright © 2005-2009 Avago Technologies. All rights reserved.
AV02-2176EN - December 15, 2009
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