ICHAUS IC-SM5LCHIP

iC-SM5L
LINEAR AMR SENSOR (5 mm)
Rev A3, Page 1/5
FEATURES
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Magneto resistive position sensor based on the AMR effect
Strong field sensor for 5 mm N/S pole pitch
High interpolation due to a sine signal with few harmonics
Low saturation field strength
High amplitude consistency with changes in distance
Resistant to strong magnetic fields
Not sensitive to external homogenous magnetic fields
APPLICATIONS
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Linear position sensing
Length measuring systems
CHIP
5.10 mm x 1.24 mm
BLOCK DIAGRAM
Copyright © 2006, iC-Haus
www.ichaus.com
iC-SM5L
LINEAR AMR SENSOR (5 mm)
Rev A3, Page 2/5
DESCRIPTION
iC-SM5L is a linear position sensor which operates on the AMR effect (anisotropic magneto resistance) and
has been designed to work with magnetic scales which have a N/S pole pitch of 5 mm.
When the sensor is moved along a magnetic scale with a N/S pole pitch of 5 mm the two Wheatstone bridges
generate differential sinusoidal output voltages (PSIN - NSIN) and (PCOS - NCOS) phase-shifted at 90°. One
sine/cosine cycle averaged using a pair of N/S poles is thus produced for a pole width. The absolute magnetic
field strength must be large enough for the sensor to go into saturation and for the magnetization of iC-SM5L's
resistor stripes to assume the direction of the outer magnetic fields.
The amplitudes of the differential output voltages are largely independent of the magnetic field strength and
thus not sensitive to changes in distance.
iC-SM5L is resistant to strong magnetic fields and not sensitive to external homogenous magnetic fields.
CHIP LAYOUT
PAD FUNCTIONS
Nr. Name
Function
1
2
3
4
5
6
7
VCOS
NCOS
NSIN
GND
VSIN
PSIN
PCOS
Supply Voltage Cosine Bridge
Output Cosine Output Sine Ground
Supply Voltage Sine Bridge
Output Sine +
Output Cosine +
iC-SM5L
LINEAR AMR SENSOR (5 mm)
Rev A3, Page 3/5
ABSOLUTE MAXIMUM RATINGS
Values beyond which damage may occur; device operation is not guaranteed.
Item
Symbol
Parameter
Conditions
Fig.
Unit
Min.
Max.
G001 VB
Voltage at VSIN, VCOS
-10
10
V
G002 V()
Voltage at PSIN, NSIN, PCOS, NCOS
-10
10
V
G003 I(VB)
Current in VSIN, VCOS
-10
10
mA
G004 I()
Current in PSIN, NSIN, PCOS, NCOS
-10
10
mA
TG1 Tj
Operating Junction Temperature
-40
125
°C
TG2 Ts
Storage Temperature Range
-40
125
°C
THERMAL DATA
Operating Conditions: VSIN = 5 V ± 10 %, VCOS = 5V ± 10 %
Item
Symbol
Parameter
Conditions
Fig.
Unit
Min.
T1
Ta
Operating Ambient Temperature Range
(extended range on request)
All voltages are referenced to ground unless otherwise noted.
All currents into the device pins are positive; all currents out of the device pins are negative.
-40
Typ.
Max.
85
°C
iC-SM5L
LINEAR AMR SENSOR (5 mm)
Rev A3, Page 4/5
ELECTRICAL CHARACTERISTICS
Operating Conditions:
VSIN = 5 V ± 10 %, VCOS = 5V ± 10 %, Tj = -40 ... 85 °C, |Hext| > 25 kA/m at the bottom edge of the sensor, unless otherwise noted
Item
Symbol
Parameter
Conditions
Tj
Fig.
°C
Unit
Min.
Typ.
Max.
Total Device
001
VB
Permissible Supply Voltages
VSIN, VCOS
VB = VSIN = VCOS
002
I(VB)
Supply Current in VSIN, VCOS
PSIN, NSIN, PCOS, NCOS open
VSIN connected to VCOS
003
R()
Sensor resistance
(sine and cosine bridge)
VSIN connected to VCOS
004
TC(R)
Bridge Resistance
Temperature Drift
005
Vpk
Amplitude of Differential
Output Voltages
006
TC(Va)
Amplitude
Temperature Drift
007
Vos
Offset Voltage
008
TC(Vos)
Offset Voltage
Temperature Drift
009
Vrel
Relative Change in Amplitude
distance bottom edge of the
sensor to the magnetic scale:
0 ... 2.5 mm
010
AAabs
Absolute Angle Accuracy
without offset voltage,
distance bottom edge of the
sensor to the magnetic scale:
1 mm
25
1
-10
10
V
5
10
mA
1
1.5
2
kΩ
0.29
0.33
0.37
%/K
20
mV/V
-0.29
%/K
-3
3
mV/V
-3
3
µV/VK
-5
5
%
-1
1
DEG
8
-0.37
Hext = 0 kA/m
at the bottom edge of the sensor
1
1
-0,33
APPLICATIONS INFORMATION
iC-SM5L is placed vertically above a magnetic scale with an equal distribution of pairs of N/S poles.
Figure 1: Placement of the iC-SM5L to a magnetic scale
ORDERING INFORMATION
This specification is for a newly developed product. iC-Haus therefore reserves the right to change or update, without notice, any information contained herein,
design and specification; and to discontinue or limit production or distribution of any product versions. Please contact iC-Haus to ascertain the current data.
Copying - even as an excerpt - is only permitted with iC-Haus approval in writing and precise reference to source.
iC-Haus does not warrant the accuracy, completeness or timeliness of the specification on this site and does not assume liability for any errors or omissions in
the materials. The data specified is intended solely for the purpose of product description. No representations or warranties, either express or implied, of
merchantability, fitness for a particular purpose or of any other nature are made hereunder with respect to information/specification or the products to which
information refers and no guarantee with respect to compliance to the intended use is given. In particular, this also applies to the stated possible applications or
areas of applications of the product.
iC-Haus conveys no patent, copyright, mask work right or other trade mark right to this product. iC-Haus assumes no liability for any patent and/or other trade
mark rights of a third party resulting from processing or handling of the product and/or any other use of the product.
iC-SM5L
LINEAR AMR SENSOR (5 mm)
Rev A3, Page 5/5
Type
iC-SM5L
Package
Order designation
iC-SM5L CHIP
For information about prices, terms of delivery, options for other case types, etc., please contact:
iC-Haus GmbH
Am Kuemmerling 18
D-55294 Bodenheim
GERMANY
Tel +49-6135-9292-0
Fax +49-6135-9292-192
http://www.ichaus.com