AL616 / LK16
MagnetoResistive Length and Angle Sensor
Data sheet
The AL616 is an Anisotropic Magneto Resistive (AMR) position
sensor. The sensor contains two Wheatstone bridges shifted
against each other with separate supply pins and a common
ground. The output signals are proportional to sine and cosine of
the coordinate to be measured (see Fig.2).
The MR strips of this FIXPITCH® sensor geometrically match to a
pole length of 2 mm (equal to a magnetic period of 4 mm). Additionally, the sensor layout incorporates PERFECTWAVE® technology, i.e. the position of each block of MR strips has a special arrangement to filter higher harmonics and to increase the signal
quality. The resistances in this PUREPITCH® sensor are
distributed over several poles, thus the errors in the measurement
scale are reduced without any signal delay.
The amplitude is almost constant up to a distance of 2.5 mm between sensor and magnetic scale. It is not necessary to operate
the sensor with a stabilizing field.
The bond version of AL616 is available as bare die or on wafer.
For SMD processing, the sensor is available in a SIL6 package.
Product overview of AL616
Article description
Package
Delivery Type
LK16AC
Bare Die
Waffle Pack
LK16AB
Die on Wafer 1)
Waferbox
AL616AKA-AC
SIL6 (7.6 x 1.4 x 3.5 mm)
P
VCC
Voff
Vpeak
RB
Carrier
Min.
Typ.
Max.
Unit
Pitch (magnetic pole length)
-
2
-
mm
Supply voltage
-
3
5.5
V
Offset voltage per VCC
-2
-
+2
mV/V
Signal amplitude per VCC
9
11
13
mV/V
2.2
3.4
4.6
kΩ
Bridge resistance
Absolute maximum ratings
In accordance with the absolute maximum rating system (IEC60134).
Symbol
Features
• Based on the Anisotropic Magneto Resistive (AMR) effect
•
•
•
•
Quick reference guide
Parameter
AL616AKA
• Contains two Wheatstone bridg-
1) Minimum order quantities apply.
Symbol
LK16A
Parameter
Min.
Max.
Unit
VCC
Supply voltage
-5.5
+5.5
V
Tamb
Ambient temperature
-40
+125
°C
Tstg
Storage temperature
-65
+150
°C
Stresses beyond those listed under “Absolute maximum ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of
the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
es on Chip
Sine and Cosine output
Adapted to 2 mm poles
Averaging over 2 poles
Ambient temperature range
from –40 °C to +125 °C
Advantages
• Contactless angle and position
•
•
•
•
•
•
measurement
Large air gap
High signal amplitude
Excellent accuracy
Insensitive to interference field
Minimized offset voltage
Negligible hysteresis
Applications
Incremental or absolute encoder
for linear or rotary movements in
various industrial applications, for
example:
• Motor integrated encoder
• Motorfeedback system
• Camera focus adjustment
• Microscope table positioning
• Workshop calliper
LK16.DSE.02
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© Sensitec GmbH
Data sheet
Page 1 of 6
Subject to technical changes
April 2012
AL616 / LK16
MagnetoResistive Length and Angle Sensor (2 mm)
Magnetic data
Symbol
Parameter
Hext
Conditions
Magnetic field strength
Min.
Typ.
Max.
Unit
5
10
-
kA/m
Min.
Typ.
Max.
Unit
-
3
5.5
V
See Fig.2
-2
-
+2
mV/V
Tamb = (-20...+85)°C
-
±2
±5
(µV/V)/K
See Fig.2
9
11
13
mV/V
-4.8
-4.0
-3.2
10-3/K
2.2
3.4
4.6
kΩ
1.9
2.5
3.1
%/K
Min.
Typ.
Max.
Unit
-
20
-
µm
-
0.1
1
% of Vpeak
1)
1) The stimulating magnetic field in the sensor plane to ensure minimum error specified in note 7.
Electrical data
Tamb = 25 °C; Hext = 25 kA/m; VCC = 5 V; unless otherwise specified.
Symbol
Parameter
Conditions
VCC
Supply voltage
Voff
Offset voltage per VCC
TCVoff
Temperature coefficient of Voff
Vpeak
Signal amplitude per VCC
2)
3)
Temperature coefficient of Vpeak 4)
TCVpeak
Tamb = (-20...+85)°C
Bridge resistance 5)
RB
TCRB
Temperature coefficient of RB
Voff(T2) - Voff(T1)
T2 - T1
2) TCVoff =
6)
Tamb = (-20...+85)°C
with T1 = -20 °C; T2 = +85 °C.
3) Maximal output voltage without offset influences. Periodicity of Vpeak is sin(2P) and cos(2P).
Vpeak(T2) - Vpeak(T1)
Vpeak(T1) · (T2 - T1)
4) TCVpeak = 100 ·
with T1 = -20 °C; T2 = +85 °C.
5) Bridge resistance between pads 1 and 5, 2 and 6, and 3 and 4.
6) TCRB = 100 ·
RB(T2) - RB(T1)
RB(T1) · (T2 - T1)
with T1 = -20 °C; T2 = +85 °C.
Accuracy
Tamb = 25 °C; Hext = 25 kA/m; VCC1 = 5 V; unless otherwise specified.
Symbol
∆x
k
Parameter
Measurement error
Conditions
7)
Amplitude synchronism
8)
7) ∆x = |xreal - xmeasured| without offset influences due to deviations from ideal sinusoidal characteristics (ascertained at an ideal
magnetic scale).
Vpeak1
8) k = 100 - 100 ·
Vpeak2 .
Dynamical data
Symbol
f
Parameter
Conditions
Frequency range
Min.
Max.
Unit
0
>1
MHz
General data
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
P
Pitch (magnetic pole length)
See Fig.1
-
2
-
mm
d
Distance
See Fig.1
-
0.7
1.0
mm
Tamb
Ambient temperature
-40
-
+125
°C
Tstg
Storage temperature
-65
-
+150
°C
LK16.DSE.02
www.sensitec.com
© Sensitec GmbH
Data sheet
Page 2 of 6
Subject to technical changes
April 2012
AL616 / LK16
MagnetoResistive Length and Angle Sensor (2 mm)
P = 2 mm
d
1
2
3
4
5
6
x
0
Fig.1: Arrangement of sensor and magnetic scale. In this example the sensor moves in the x-direction along the
fixed scale.
100
+VO1
+VO2
-VO1
-VO2
VO1
VO2
50
Vpeak1
Output voltage (mV)
VCC
Voff1
0
-50
-100
0
GND
1
2 (1P)
3
4 (2P)
Length x (mm)
Fig.2: left: Simplified circuit diagram.
right: Output signals as function of linear displacement.
LK16.DSE.02
www.sensitec.com
© Sensitec GmbH
Data sheet
Page 3 of 6
Subject to technical changes
April 2012
AL616 / LK16
MagnetoResistive Length and Angle Sensor (2 mm)
AL616 as bare die
Pinning
Pad
Symbol Parameter
1
+VO1
Positive output voltage bridge 1
2
+VO2
Positive output voltage bridge 2
3
VCC
Supply voltage
4
GND
Ground
5
-VO1
Negative output voltage bridge 1
6
-VO2
Negative output voltage bridge 2
1 2
3 4
5 6
Top view
Fig.3: Simplified layout of LK16A.
Mechanical data
4200 ± 100
4035
800 ± 100
120 (2; 5)
125 (3; 4)
135 (1; 6)
500
50
65
a
b
1
2
3
4
5
6
I
M
O
1168
1473
1915
2185
2628
2933
Notes:
• All dimensions in µm.
• Pad dimensioning correlates to pad centre.
• The dashed outline drafted the dicing line.
•! The shaded area denotes the active chip area. This area must not be touched
during handling or assembly since this may cause damage to the chip.
Pad
1
2
3
4
5
6
axb
90 x 195
110 x 205
110 x 200
110 x 200
110 x 205
90 x 195
Fig.4: Chip outline for LK16A as bare die.
Data for Packaging and Interconnection Technologies
Parameter
Value
Unit
Chip area
(4.2 ± 0.1) x (0.8 ± 0.1)
mm2
Chip thickness
525 ± 40
µm
Pad size
See Fig.4
-
Pad thickness
0.6
Pad material
AlCu
µm
-
LK16.DSE.02
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© Sensitec GmbH
Data sheet
Page 4 of 6
Subject to technical changes
April 2012
AL616 / LK16
MagnetoResistive Length and Angle Sensor (2 mm)
Mechanical data AL6146KA
Top view
Marker white
Side view
On this side no contact
Bottom view
Notes:
•
•
•
•
All dimensions in mm.
Pad dimensioning correlates to pad centre.
Pad dimensions: 0.6 mm x 5.5 mm
Active chip area, This area must not be touched during handling or assembly since this may cause damage to the chip
Fig. 5: SIL6 outline for AL616AKA.
LK16.DSE.02
www.sensitec.com
© Sensitec GmbH
Data sheet
Page 5 of 6
Subject to technical changes
April 2012
AL616 / LK16
MagnetoResistive Length and Angle Sensor (2 mm)
General Information
Product Status
The product is in series production. Note: The status of the product may have changed since this data
sheet was published. The latest information is available on the internet at www.sensitec.com.
Right to make changes
Sensitec GmbH reserves the
right to make changes, without
notice, in the products, including software, described or contained herein in order to improve design and/or performance. Sensitec GmbH assumes no responsibility or liability for the use of any of these
pro-ducts.
Application Information
Applications that are described
herein for any of these products
are for illustrative purposes only. Sensitec GmbH makes no
representation or warranty that
such applications will be suitable for the specified use without
further testing or modification.
Life critical applications
These products are not qualified for use in life support appliances, aeronautical applications or devices or systems
where malfunction of these
products can reasonably be
expected to result in personal
injury.
Sensitec GmbH
Georg-Ohm-Straße 11
35633 Lahnau
Germany
Solutions for measuring:
• Position
• Angle
• Magnetic field
• Current
Fon +49 (0) 64 41/ 97 88-0
Fax +49 (0) 64 41/ 97 88-17
E-Mail info@sensitec.com
www.sensitec.com
Copyright © 2012 by Sensitec GmbH, Germany
All rights reserved. No part of this document may be copied or reproduced in any form or by any means without
the prior written agreement of the copyright owner. The information in this document is subject to change without
notice. Sensitec GmbH does not assume any liability for any consequence of its use.
www.sensitec.com
© Sensitec GmbH
Data sheet
Page 6 of 6
Subject to technical changes
April 2012