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Philips Semiconductors
Magnetoresistive sensors for
magnetic field measurement
S
ENSOR TEMPERATURE DRIFT
The sensitivity of MR sensors is also temperature
dependent, with sensitivity decreasing as temperature
increases (Fig.31).The effect on sensor output is certainly
handbook, full pagewidth
Fig.31 Output voltage 'V
field 'H
', at several temperatures.
y
2000 Sep 06
15
V O
(mV/V)
10
5
0
5
10
15
3
2
1
' as a fraction of the supply voltage for a KMZ10B sensor, as a function of transverse
o
not negligible, as it can produce a difference of a factor of
three within a 25 C to +125 C temperature range, for
fields up to 0.5 kA/m. This effect is not compensated for by
the flipping action described in the last section.
T
= 25 C
amb
operating range
0
1
2
H
26
MLC134
o
o
25 C
o
75 C
o
125 C
3
(kA/m)
y
General
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