ZMZ20M Datasheet | Zetex Semiconductors

DESCRIPTION The ZMZ20M is an extremely sensitive magnetic field sensor in a 4 pin E-line package employing the magneto-resistive effects of thin film Permalloy. It allows the measurement of magnetic fields or the detection of metallic parts. The sensor consists of a chip covered with Permalloy stripes which form a Wheatstone bridge, whose output voltage is proportional to the magnetic field ponent Hy. A perpendicular field Hx is necessary to suppress the hysteresis and this is provided by an internal permanent magnet. Hy Hx FEATURES - Output voltage proportional to magnetic field Hy - Magnetic fields vertical to the chip level are not effective E-LINE APPLICATIONS - Linear position sensors for process control, door interlocks, proximity detectors, machine tool sensing .. - Scalar measurement for passing - Automotive - door switches, engine position and speed sensing - Metering of fluids by sensing rotation of impeller - Traffic counting & vehicle-type sensing - Measurement of current in a conductor without connection ORDERING INFORMATION DEVICE ZMZ20M BOX Bulk in box (2,000 ponents per box) PINOUT DEVICE MARKING - M2M SIDE VIEW ISSUE 2 - MARCH 2004 1 SEMICONDUCTORS ABSOLUTE MAXIMUM RATINGS PARAMETER Supply voltage Total power dissipation Operating temperature range SYMBOL VB P TOT T amb LIMIT 12 120 -25 to +125 UNIT V m W °C ELECTRICAL CHARACTERISTICS (at Tamb = 25°C unless otherwise stated) PARAMETER Bridge resistance Output voltage range Auxiliary field Disturbing field Open circuit sensitivity Hysteresis of output voltage Offset voltage Operating frequency Temperature coefficient of offset voltages Temperature coefficient of bridge resistance Temperature coefficient of open circuit sensitivity V B =5V SYMBOL R br V O /V B Hx Hd S V OH /V B V off /V B f max TCV off TCR br TCS V MIN. 1.2 12 3.0 -1.5 0 -3 0.25 -0.25 TYP. 1.7 18 2.5 5.0 0.3 -0.3 MAX. 2.2 24 30 7.0 50 +1.5 1 +3 0.35 -0.35 UNIT k⍀ m V/V k A/m k A/m (m V/V)/(k A/m) No disturbing field H d...