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IC-MZ Datasheet(PDF) 2 Page - IC-Haus GmbH |
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IC-MZ Datasheet(HTML) 2 Page - IC-Haus GmbH |
2 / 12 page iC-MZ DIFFERENTIAL HALL SWITCH Rev B1, Page 2/12 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 amplifier with a back-end com- parator and a complementary line driver. A difference in field strength of the magnetic normal components at iC-MZ’s two Hall elements is amplified 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 field strength difference with a given hysteresis and thus provides a clear switch. With a moving gear or pole wheel the frequency of the tooth or pole pair corresponds to the frequency of the output signal. The amplified 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 predefined start state with D at low and ND at high; the analog outputs A and NA 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 field strength is suf- ficiently strong. The complementary line drivers are suitable for sup- ply voltages of 4.5 to 36 V with output impedances between 40 and 110 Ω. 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. 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. PACKAGING INFORMATION PIN CONFIGURATION DFN10 iC-MZ ... ...yyww 6 9 7 8 10 5 2 4 3 1 EP PIN FUNCTIONS No. Name Function 1 GND1 Ground 2 D 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 EP Exposed Pad GND1 and GND2 have to be tied together to a common ground. Connect the Exposed Pad EP to this common ground. Use a large ground plane to improve thermal performance. EP is not intended as an electrical connection point. Orientation of the logo ( MZ CODE ...) is subject to alteration. |
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