iC-MZ
DIFFERENTIAL HALL SWITCH
Rev A3, Page 2/11
DESCRIPTION
Hall-effect device iC-MZ is a differential magnetic switched to high impedance. Following a delay of
sensor used to scan pole wheels or ferromagnetic about 200 µs the analog outputs are activated and
gear wheels. It contains two Hall sensors set 2.0 mm the status of the two Hall sensors ist transmitted by
apart, a differential amplifier with a back-end com- the line drivers if the difference in field strength is suf-
parator and a complementary line driver. A difference ficiently strong.
in field strength of the magnetic normal components
at iC-MZ’s two Hall elements is amplified and eval- The complementary line drivers are suitable for sup-
uated as an analog signal and fed to the integrated ply voltages of 4.5 to 36 V with output impedances
line drivers as a complementary digital signal. The between 40 and 110 Ω. An integrated over temper-
digital output signal tracks the change in sign of the ature and undervoltage monitor switches the output
field strength difference with a given hysteresis and stages to high impedance in the event of error and
thus provides a clear switch.
activates the open drain output NERR.
With a moving gear or pole wheel the frequency of By activating the TEST input the device can be used
the tooth or pole pair corresponds to the frequency as an independent two-channel line driver. In this
of the output signal. The amplified analog differential case, the outputs D and ND are controlled by the in-
sensor signal is available for diagnostic purposes at puts A and NA.
pins A and NA.
The analog section of the iC-MZ circuit is fed by an
Once the device has been switched on the digital out- internal supply of 5 V which is available at pin VPA
puts are initially in a predefined start state with D at for reference purpose. To improve signal quality, a
low and ND at high; the analog outputs A and NA capacitor can be connected to this pin.
PACKAGES
PIN CONFIGURATION
PIN FUNCTIONS
No. Name Function
1 GND1 Ground
2 D
Digital Output, not inverted
1
2
3
4
5
10
9
3 VB
4 ND
5 GND2 Ground
6 TEST Linedriver Test Mode
7 NERR Error Output, open drain
Supply Voltage
Digital Output, inverted
8
iC-MZ
...
...yyww
7
6
8 VPA
9 NA
Internal 5 V Supply Voltage
Analog Output, invertiert
10 A
Analog Output, non invertierend
For improved thermal dissipation the thermal pad on the package underside should be connected to ground in a
suitable manner (ground plane). GND1 and GND2 should both be connected to ground.
Orientation of the logo ( MZ CODE ...) is subject to alteration.
ICHAUS [ IC-HAUS GMBH ]
