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IC-MZ_11 Datasheet, PDF (2/11 Pages) IC-Haus GmbH – DIFFERENTIAL HALL SWITCH | |||
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iC-MZ
DIFFERENTIAL HALL SWITCH
Rev A3, Page 2/11
DESCRIPTION
Hall-effect device iC-MZ is a differential magnetic
sensor used to scan pole wheels or ferromagnetic
gear wheels. It contains two Hall sensors set 2.0 mm
apart, a differential ampliï¬er with a back-end com-
parator and a complementary line driver. A difference
in ï¬eld strength of the magnetic normal components
at iC-MZâs two Hall elements is ampliï¬ed and eval-
uated as an analog signal and fed to the integrated
line drivers as a complementary digital signal. The
digital output signal tracks the change in sign of the
ï¬eld strength difference with a given hysteresis and
thus provides a clear switch.
switched to high impedance. Following a delay of
about 200 µs the analog outputs are activated and
the status of the two Hall sensors ist transmitted by
the line drivers if the difference in ï¬eld strength is suf-
ï¬ciently strong.
The complementary line drivers are suitable for sup-
ply voltages of 4.5 to 36 V with output impedances
between 40 and 110 â¦. An integrated over temper-
ature and undervoltage monitor switches the output
stages to high impedance in the event of error and
activates the open drain output NERR.
With a moving gear or pole wheel the frequency of
the tooth or pole pair corresponds to the frequency
of the output signal. The ampliï¬ed analog differential
sensor signal is available for diagnostic purposes at
pins A and NA.
Once the device has been switched on the digital out-
puts are initially in a predeï¬ned start state with D at
low and ND at high; the analog outputs A and NA
By activating the TEST input the device can be used
as an independent two-channel line driver. In this
case, the outputs D and ND are controlled by the in-
puts A and NA.
The analog section of the iC-MZ circuit is fed by an
internal supply of 5 V which is available at pin VPA
for reference purpose. To improve signal quality, a
capacitor can be connected to this pin.
PACKAGES
PIN CONFIGURATION
1
10
2
9
3
iC-MZ
8
4
...
7
...yyww
5
6
PIN FUNCTIONS
No. Name Function
1 GND1 Ground
2D
Digital Output, not inverted
3 VB Supply Voltage
4 ND Digital Output, inverted
5 GND2 Ground
6 TEST Linedriver Test Mode
7 NERR Error Output, open drain
8 VPA Internal 5 V Supply Voltage
9 NA 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.
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