IC-SM2L Datasheet, PDF (2/5 Pages) IC-Haus GmbH – LINEAR AMR SENSOR (2 mm)

iC-SM2L
LINEAR AMR SENSOR (2 mm)
Rev A2, Page 2/5
DESCRIPTION
iC-SM2L 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 2 mm.
When the sensor is moved along a magnetic scale with a N/S pole pitch of 2 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-SM2L's
resistor stripes to assume the direction of the outer magnetic field.s
The amplitudes of the differential output voltages are largely independent of the magnetic field strength and
thus not sensitive to changes in distance.
iC-SM2L is resistant to strong magnetic fields and not sensitive to external homogenous magnetic fields.
CHIP LAYOUT
PAD FUNCTIONS
Nr. Name Function
1 NCOS Output Cosine -
2 NSIN Output Sine -
3 VB
Supply Voltage Sine/Cosine Bridge
4 GND Ground
5 PCOS Output Cosine +
6 PSIN Output Sine +