ZMZ20M MAGNETIC FIELD SENSORS 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 component 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 E-LINE • Magnetic fields vertical to the chip level are not effective APPLICATIONS • Linear position sensors for process control, door interlocks, proximity detectors, machine tool sensing • Scalar measurement for compassing • 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 PINOUT ORDERING INFORMATION DEVICE ZMZ20M BOX Bulk in box (2,000 components per box) DEVICE MARKING • M2M SIDE VIEW ISSUE 2 - MARCH 2004 1 SEMICONDUCTORS ZMZ20M ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL LIMIT UNIT Supply voltage VB 12 V Total power dissipation P TOT 120 mW Operating temperature range T amb -25 to +125 °C ELECTRICAL CHARACTERISTICS (at Tamb = 25°C unless otherwise stated) PARAMETER SYMBOL MIN. TYP. MAX. UNIT Bridge resistance R br 1.2 1.7 2.2 k⍀ Output voltage range V O /V B 12 18 24 mV/V Auxiliary field Hx - 2.5 - kA/m Disturbing field Hd - - 30 kA/m Open circuit sensitivity S 3.0 5.0 7.0 Hysteresis of output voltage V OH /V B - - 50 µV/V CONDITIONS (mV/V)/(kA/m) No disturbing field H d allowed Hy ⱕ 2kA/m Offset voltage V off /V B -1.5 - +1.5 mV/V Operating frequency f max 0 - 1 MHz Temperature coefficient of offset voltages TCV off -3 - +3 (µV/V)/K T amb = -25 to +125°C Temperature coefficient of bridge resistance TCR br 0.25 0.3 0.35 %/K T amb = -25 to +125°C Temperature coefficient of open circuit sensitivity TCS V -0.25 -0.3 -0.35 %/K T amb = -25 to +125°C V B =5V ISSUE 2 - MARCH 2004 SEMICONDUCTORS 2 ZMZ20M Sensor output characteristic ZMZ20M Vo=f(Hy)typ. Vo(mV/V) 15 10 5 0 -5 -10 -15 -6 -5 VB(V) -4 -3 -2 -1 0 Hy(kA/m) 1 2 3 4 5 6 Supply voltage (maximum) derating curve ZMZ20M Vbmax =f(T amb ) 14.000 12.000 10.000 8.000 6.000 4.000 2.000 0.000 -50 0 50 100 150 200 Tamb (˚C ) ISSUE 2 - MARCH 2004 3 SEMICONDUCTORS ZMZ20M PACKAGE OUTLINE D R E A B G G G H C F B1 L B Controlling dimensions are in millimeters. Approximate conversions are given in inches PACKAGE DIMENSIONS Millimeters Inches DIM Min Max Min Max A 0.8 1.0 0.032 0.039 B 0.35 0.48 0.014 0.019 B1 0.45 0.60 0.018 0.024 C 4.0 4.4 0.158 0.173 D 3.8 4.2 0.150 0.165 E 2.4 2.8 0.094 0.110 F 1.2 - 0.047 - G 1.25 - 0.049 - © Zetex plc 2004 Europe Americas Asia Pacific Corporate Headquaters Zetex GmbH Streitfeldstraße 19 D-81673 München Germany Zetex Inc 700 Veterans Memorial Hwy Hauppauge, NY 11788 USA Zetex (Asia) Ltd 3701-04 Metroplaza Tower 1 Hing Fong Road, Kwai Fong Hong Kong Zetex plc Fields New Road, Chadderton Oldham, OL9 8NP United Kingdom Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 [email protected] Telephone: (1) 631 360 2222 Fax: (1) 631 360 8222 [email protected] Telephone: (852) 26100 611 Fax: (852) 24250 494 [email protected] Telephone (44) 161 622 4444 Fax: (44) 161 622 4446 [email protected] These offices are supported by agents and distributors in major countries world-wide. This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. The Company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service. For the latest product information, log on to www.zetex.com ISSUE 2 - MARCH 2004 SEMICONDUCTORS 4