KMY_KMZ

Linear Magnetic Field Sensors

1/2016

Page 3

Auxiliary field strengths below Hx<1.5 kA/m are not recommended, as small disturbances may flip the

magnetization domains. Sometimes, the magnetic conditions in the application may provide enough Hx bias

field stabilization. MEAS Germany can provide advice for customer specific magnet arrangements.

If a bias field Hx is not applied or

Hx is less than 2.5 kA/m, the

sensor may be used only in a

limited field range Hy, depending

on the present total bias field

Hx,tot. In this case, it is strongly

recommended to ‘premagnetize’

the sensor, i.e. align all magnetic

domains consistently, prior to the

measurement.

Hx,tot is the sum of all acting

magnetic fields in x direction at

the sensor die.

Do not use the sensor outside

the

safe

operating

area.

Leaving the save operating area

can

destroy

an

existing

premagnetization and therefore

will

lead

to

unreproducible

sensor signals.

Figure 2

: Safe operating area

CHARACTERISTIC VALUES / SENSOR SPECIFICATIONS

Parameter

Symbol

Condition

Min

Typ

Max

Unit

Operating Limits

max. supply voltage

10

V

max. current

9

mA

operating temperature

-40

+150



C

storage temperature

-40

+150



C

General Sensor Specifications

TC of amplitude

TCSV

Condition A, C

-0.35

%/K

TC of resistance

TCBR

Condition A, C

+0.35

%/K

TC of offset

TCVoff

Condition A, C

-4

0

+4

µV/V/K

Sensor Specifications KMY 20 S, KMZ 20 S, KMY 22 (T=25 °C, Hx=3 kA/m externally)

Supply voltage

Condition A, B

5

V

Bridge resistance

Condition A, B

1200

1700

2200



Output signal range



Condition A, B

16

20

24

mV/V

Offset voltage

Condition A, B

-1

0

+1

mV/V

Sensitivity

S

Condition A, B

3.7

4.7

5.7

mV/V/kA/m