November 1994

4

Philips Semiconductors

Preliminary specification

Magnetic field sensor

KM110B/2

Notes to the characteristics

1. Magnet (Ferroxdure 100) delivers an auxiliary field of

Above 110

stable sensor operation may be threatened by

disturbing magnetic fields.

2.

.

3. The sensitivity increases and decreases linear with the

supply voltage, thus the static output voltage is directly

proportional to the supply voltage.

4. Sensor bridge response only. When sensing high

speed rotation, the operating frequency may be

reduced due to eddy current effects.

S

V

1.6 kA/m

=

()

V

0

=

()

–

1.6

V

CC

×

-----------------------------------------------------------------------------------------------------------------

=

M = direction of magnetization.

N, S = magnetic poles.

Fig.3 Principle of magnetization.

handbook, halfpage

MBD882

43

2

1

Hy

Hx

M

NS

S

Fig.4 Sensor output characteristic.

handbook, halfpage

–2

–1

0

2

8

4

–4

–8

0

MBD885

1

V

(mV/V)

H y (kA/m)

O

Fig.5 Power derating curve.

handbook, halfpage

50

100

125

0

100

MBD892

150

75

50

25

o

( C)

(mW)

tot

200

P

Tamb

0