KMZ10C,112 NXP Semiconductors, KMZ10C,112 Datasheet - Page 11

• Manufacturer Part Number: KMZ10C,112
• Description: IC MAGNETIC FIELD SENSOR SOT195
• Manufacturer: NXP Semiconductors
• Type: Special Purposer

Specifications of KMZ10C,112

• Sensing Range: 2mV/V
• Voltage - Supply: 5 V ~ 10 V
• Output Type: Analog
• Operating Temperature: -40°C ~ 150°C
• Package / Case: SOT-195
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 150 C
• Minimum Operating Temperature: - 40 C
• Supply Voltage (min): 5 V
• Supply Voltage (max): 10 V
• Operating Temperature (min): -40C
• Operating Supply Voltage (typ): 5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Current - Output (max): -
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 933698480112; KMZ10C T/R; KMZ10C T/R

Philips Semiconductors
Further information for advanced users
T
In sensors employing the MR effect, the resistance of the
sensor under the influence of a magnetic field changes as
it is moved through an angle
It can be shown that
and
where H
comprising the so called demagnetizing and anisotropic
fields.
Applying equations (3) and (4) to equation (2) leads to:
which clearly shows the non-linear nature of the MR effect.
More detailed information on the derivation of the formulae
for the MR effect can be found in Appendix 1.
L
The magnetoresistive effect can be linearized by
depositing aluminium stripes (Barber poles), on top of the
permalloy strip at an angle of 45 to the strip axis (see
Fig.12). As aluminium has a much higher conductivity than
permalloy, the effect of the Barber poles is to rotate the
current direction through 45 (the current flow assumes a
‘saw-tooth’ shape), effectively changing the rotation angle
of the magnetization relative to the current from
1998 Jun 12
R
sin
sin
R
R
INEARIZATION
HE
Magnetic field sensors
=
=
=
2
2
45 .
MR
R
R
R
=
=
O
O
O
o
EFFECT
1 for H H
+
------- - for H H
H
+
H
for H H
can be regarded as a material constant
2
O
2
R
R
O
O
cos
1
O
–
2
O
------- -
H
H
O
2
O
2
for H H
as given by:
0
to
(2)
(3)
(4)
(5)
(6)
11
A Wheatstone bridge configuration is also used for
linearized applications. In one pair of diagonally opposed
elements, the Barber poles are at +45 to the strip axis,
while in another pair they are at 45 . A resistance
increase in one pair of elements due to an external
magnetic field is thus ‘matched’ by a decrease in
resistance of equal magnitude in the other pair.
The resulting bridge imbalance is then a linear function of
the amplitude of the external magnetic field in the plane of
the permalloy strips, normal to the strip axis.
handbook, halfpage
Fig.12 Linearization of the magnetoresistive effect.
I
Magnetization
Barber pole
General
Permalloy
MLC125
I