KMI15/1 T/R NXP Semiconductors, KMI15/1 T/R Datasheet - Page 4

• Manufacturer Part Number: KMI15/1 T/R
• Description: Speed Sensors MAGNETIC FIELD SENSR
• Manufacturer: NXP Semiconductors

Specifications of KMI15/1 T/R

• Maximum Operating Temperature: 85 C
• Supply Voltage: + 16 V
• Operating Supply Voltage: - 0.5 V to + 16 V
• Minimum Operating Temperature: - 40 C
• Features: Detects rotational speed of ferrous gear wheels and reference marks
• Maximum Output Current: 14 mA
• Other names: KMI15/1,115

Philips Semiconductors
FUNCTIONAL DESCRIPTION
The KMI15/1 sensor is sensitive to the motion of ferrous
gear wheels or reference marks. The functional principle is
shown in Fig.3. Due to the effect of flux bending, the
different directions of magnetic field lines in the
magnetoresistive sensor element will cause an electrical
signal. Because of the chosen sensor orientation and the
direction of ferrite magnetization, the KMI15/1 is sensitive
to movement in the ‘y’ direction in front of the sensor only
(see Fig.2).
The magnetoresistive sensor element signal is amplified,
temperature compensated and passed to a Schmitt trigger
in the conditioning integrated circuit (Figs 4 and 5).
The digital output signal level (see Fig.6) is independent of
the sensing distance within the measuring range (Fig.14).
A (2-wire) output current enables safe transfer of the
sensor signal to the detecting circuit (see Fig.7).
The integrated circuit housing is separated from the
sensor element housing to optimize the sensor behaviour
at high temperatures.
2000 Sep 05
handbook, full pagewidth
Integrated rotational speed sensor
sensor
z
gear wheel
(a)
y
magnet
(b)
Fig.3 Functional principle.
field lines
magnetic
4
handbook, halfpage
y
Fig.2 Component detail of the KMI15/1.
(c)
x
direction
motion
of
magnet with
direction of
magnetization
sensor
IC
Product specification
(d)
KMI15/1
x
MBH778
MRA957
z