KMY_KMZ

Linear Magnetic Field Sensors

1/2016

Page 2

FEATURES



Output proportional to magnetic field

strength with very high sensitivity



Very small hysteresis



Large operating temperature range, from

-40°C up to +150 °C



Highly reliable



With / without internal magnet

APPLICATIONS



Detection of very weak magnetic fields, like

earth magnetic field, or field generated by

small magnetic particles



Detection of objects that distort non-local

magnetic fields



Revolution measurement on ferromagnetic

gears



Contactless switch



Contactless displacement / position sensor

DESCRIPTION

An uniaxial linear magnetic field (in y-direction) will generate a linear output within the specified magnetic field range.

The sensor is available in two types: the KMY 20 M, KMY 21 M and KMZ 20 M sensor types contain intrinsic

magnets which provide an auxiliary magnetic field (in x-direction) at the sensor die which prevents magnetic

domains from flipping irregularly.

If

the

dies

MR174B

or

the

components KMY22, KMY20S or

KMZ20S

are used, the auxiliary

field has to be provided by the

user. The dependence of the

sensitivity

with

auxiliary

field

strength is depicted in the figure

aside.

Figure 1

: Sensitivity dependence

on auxiliary field strength

Auxiliary Field Dependence

0

5

10

15

0

1

2

3

4

5

Hx in kA/m