Datasheet

ManualsBrandsIC Haus ManualsHall Effect SensorsHall Position Sensor DFN-10

preliminary preliminary

iC-MZ

DIFFERENTIAL HALL SWITCH

Rev A1, Page 1/11

FEATURES

♦ Dual Hall sensors set 2.0 mm apart

♦ Magnetic ﬁeld frequency range from DC to 40kHz

♦ Supply voltage range 4.5 to 36 V

♦ Complementary push-pull line driver outputs with integrated

line adaptation

♦ Output stages are current limited and short-circuit-proof due to

temperature shutdown

♦ Min. 200 mA output current at 24 V supply voltage

♦ Low driver stage saturation voltage (< 0.4 V at 30 mA)

♦ RS422-compatible (TIA / EIA standard)

♦ Temperature and supply voltage monitor with error messaging

♦ Ampliﬁed differential sensor signal, accessible for diagnostic

purposes

♦ Additional mode of operation (twofold line driver)

APPLICATIONS

♦ Gear wheel sensing

♦ Pole wheel and magnetic tape

scanning

♦ Magnetic incremental encoders

♦ Proximity switches

♦ Two-channel line drivers up to

100 kHz

PACKAGES

DFN10 4 mm x 4 mm

BLOCK DIAGRAM

NERR

TEST

GND2GND1

VPA

4.5 36 V…

RS-422

5...36 V

LINE

iC-MZ

TEMPERATURE MONITOR

ERROR CONTROL

HALL SENSOR

SUPPLY

AMPLIFIER A/D LINE DRIVER

ANALOG BUFFER

TEST

>145°C

Summary of content (11 pages)

PAGE 1
ar y n i im prel iC-MZ DIFFERENTIAL HALL SWITCH Rev A1, Page 1/11 FEATURES APPLICATIONS ♦ ♦ ♦ ♦ ♦ Gear wheel sensing ♦ Pole wheel and magnetic tape scanning ♦ Magnetic incremental encoders ♦ Proximity switches ♦ Two-channel line drivers up to 100 kHz ♦ ♦ ♦ ♦ ♦ ♦ ♦ Dual Hall sensors set 2.0 mm apart Magnetic field frequency range from DC to 40 kHz Supply voltage range 4.
PAGE 2
ar y n i im prel iC-MZ DIFFERENTIAL HALL SWITCH Rev A1, 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 amplifier with a back-end comparator and a complementary line driver.
PAGE 3
ar y n i im prel iC-MZ DIFFERENTIAL HALL SWITCH Rev A1, Page 3/11 ABSOLUTE MAXIMUM RATINGS Beyond these values damage may occur; device operation is not guaranteed. Absolute Maximum Ratings are no Operating Conditions. Integrated circuits with system interfaces, e.g. via cable accessible pins (I/O pins, line drivers) are per principle endangered by injected interferences, which may compromise the function or durability.
PAGE 4
iC-MZ DIFFERENTIAL HALL SWITCH ar y n i im prel Rev A1, Page 4/11 ELECTRICAL CHARACTERISTICS Item No. Symbol Parameter Conditions Unit Min. Typ. Max.
PAGE 5
iC-MZ DIFFERENTIAL HALL SWITCH ar y n i im prel Rev A1, Page 5/11 ELECTRICAL CHARACTERISTICS Item No. Symbol Parameter Conditions Unit Min. Typ. Max. 110 805 Rout()hi Output resistance VB = 10...36 V, V() =0.5 * VB 40 75 806 SR()hi Slew Rate high VB= 36 V, Cl() = 100 pF 100 250 807 Vc()hi Free Wheel Clamp Voltage high I() = 100 mA, VB = VCC = GND 0.5 808 Vs()lo Saturation Voltage low 809 Vs()lo Saturation Voltage low 810 Isc()lo Short circuit current low V() = 1.
PAGE 6
iC-MZ DIFFERENTIAL HALL SWITCH ar y n i im prel Rev A1, Page 6/11 DEFINITION OF MAGNETIC FIELDS AND SENSOR OUTPUT SIGNALS In essence iC-MZ is non-magnetic and thus has practically no effect on the magnetic field to be scanned. The Hall sensors on the topside of the chip or at package level (x, y) are sensing the z component Hz of the magnetic field vector at the site of each sensor. Magnetic field component Hz counts as a positive when the field lines emerge on the printed upper side of the chip.
PAGE 7
iC-MZ DIFFERENTIAL HALL SWITCH ar y n i im prel Rev A1, Page 7/11 HALL SENSOR POSITION The position of the two Hall sensors S1 and S2 is shown in Figure 5 (top view). 0.4 typ. z x side view 2,0 0,14 S1 S2 |Dy| < 0.2 |Dx| < 0.2 S1 y S2 x center of chip center of chip |DF| < 3° y Figure 5: Position of Hall sensors S1 and S2 in relation to the chip center (dimensions in mm) The position tolerances of the chip within the DFN10 package are given in Figure 6.
PAGE 8
ar y n i im prel iC-MZ DIFFERENTIAL HALL SWITCH Rev A1, Page 8/11 APPLICATON NOTES The complementary line driver couples the output signals via lines to industrial 24 V systems. Due to the possible event of short circuiting in the line the drivers are current limited and shut down with excessive temperature. The maximum possible signal frequency depends on the capacitive loading of the outputs (line length) or the power dissipation in iC-MZ caused by such.
PAGE 9
iC-MZ DIFFERENTIAL HALL SWITCH ar y n i im prel Rev A1, Page 9/11 APPLICATION EXAMPLES ϕ Gear wheel scanning Logging the position and rotation of a gear wheel with iC-MZ requires that the gear wheel is made of a soft magnetic basic material with which a magnetic field applied externally through the gear geometry can be modulated. The strength of the modulation is greatest at the gear rim, calling for iC-MZ to be placed at the shortest possible operating distance to the gear wheel.
PAGE 10
ar y n i im prel iC-MZ DIFFERENTIAL HALL SWITCH Rev A1, Page 10/11 ϕ pole wheel Pole wheel scanning Pole wheels have a cyclic magnetization along their perimeter which is used for the magnetic modulation of iC-MZ. The intensity of the magnetic field is greatest along the perimeter and significantly diminishes with an increase in distance , so that iC-MZ should be placed as close to the pole wheel as possible.
PAGE 11
iC-MZ DIFFERENTIAL HALL SWITCH ar y n i im prel Rev A1, Page 11/11 ORDERING INFORMATION Type Package Order Designation iC-MZ DFN10 iC-MZ DFN10 For technical support, information about prices and terms of delivery please contact: iC-Haus GmbH Am Kuemmerling 18 D-55294 Bodenheim GERMANY Tel.: +49 (61 35) 92 92-0 Fax: +49 (61 35) 92 92-192 Web: http://www.ichaus.com E-Mail: sales@ichaus.com Appointed local distributors: http://www.ichaus.de/support_distributors.