KMZ10C,112 NXP Semiconductors, KMZ10C,112 Datasheet - Page 39

• 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
Not surprisingly, sensor sensitivity rises as distance ‘a’
decreases. For relatively large values of ‘a’ (say 5 mm),
the increase in sensitivity is substantially linear, but at
closer spacings, when the magnetic field generated by the
current is no longer uniform over the sensor, the rate of
increase drops off. For higher currents, a similar drop off
from linearity would be observed at quite large distances,
but this is due to the magnetic field generated by the
current saturating the sensor. In this case, an optimal
linear relationship can be simply restored by using a less
sensitive sensor (refer to Table 2 in the ‘General
introduction’ for a summary of Philips sensors and their
main characteristics).
The sensor can also be laid directly onto the conductor in
a PCB and Fig.44 also shows the sensitivity of the sensor
for three widths of PCB conductor.
1998 Jun 12
handbook, full pagewidth
Magnetic field sensors
Fig.45 Current measurement using a compensating coil.
ferrite
R
V =
O
39
R
n
A second set-up, shown in Fig.45, is a more sophisticated
arrangement in which the magnetic field generated by the
current-carrying wire is compensated by a secondary
circuit wrapped around a ferrite core. At the ‘null-field’
point, detected by the sensor located in the air gap
between the ends of the core, the magnitude of the current
in the secondary circuit is a measure of the current in the
main circuit. This arrangement provides a more accurate
means of measuring current, reducing any inaccuracies as
a result of tolerances, temperature drift and slight
non-linearities in the sensor characteristics, lending itself
more to precision applications.
sensor
I
I
MPROVING ACCURACY WITH A FERRITE CORE
MLC141
I
General