KMZ51 NXP Semiconductors, KMZ51 Datasheet - Page 2

• Manufacturer Part Number: KMZ51
• Manufacturer: NXP Semiconductors

Specifications of KMZ51

• Power Dissipation: 130mW
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Package Type: SO
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 8V
• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
FEATURES
APPLICATIONS
DESCRIPTION
The KMZ51 is an extremely sensitive magnetic field
sensor, employing the magnetoresistive effect of thin-film
permalloy. The sensor contains one magnetoresistive
Wheatstone bridge and integrated compensation and
set/reset coils. The integrated compensation coil allows
magnetic field measurement with current feedback loops
to generate an output that is independent of drift in
sensitivity. The orientation of sensitivity may be set or
changed (flipped) by means of the integrated set/reset coil.
A short current pulse should be applied to the
compensation coil to recover (set) the sensor after
exposure to strong disturbing magnetic fields. A negative
current pulse will reset the sensor to reversed sensitivity.
By use of periodically alternated flipping pulses and a
lock-in amplifier, output is made independent of sensor
and amplifier offset.
QUICK REFERENCE DATA
2000 Jun 13
V
S
V
R
R
A
SYMBOL
High sensitivity
Integrated compensation coil
Integrated set/reset coil.
Navigation
Current and earth magnetic field measurement
Traffic detection.
CC
offset
comp
bridge
comp
Magnetic field sensor
bridge supply voltage
sensitivity (uncompensated)
offset voltage
bridge resistance
compensation coil resistance
compensation coil field factor; note 1
PARAMETER
2
PINNING
handbook, halfpage
PIN
1
2
3
4
5
6
7
8
index
pin 1
H ext
12
1
100
19
SYMBOL
1.5
MIN.
+I
GND
8
Fig.1 Simplified outline.
+I
+V
1
V
I
comp
comp
V
I
CC
flip
flip
O
O
5
16
170
22
flip coil
bridge supply voltage
ground
compensation coil
compensation coil
bridge output voltage
bridge output voltage
flip coil
TYP.
DESCRIPTION
Product specification
8
+1.5
3
300
25
MAX.
5
4
KMZ51
MGD827
V
mV/V
k
mV/V
------------- -
A m
------------ -
kA/m
mA
UNIT