ZMZ20 MAGNETIC FIELD SENSORS DESCRIPTION The ZMZ20 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 can be provided by using a small permanent magnet. FEATURES • Output voltage proportional to magnetic field Hy E-LINE • Adjustment of sensitivity and suppression of hysteresis by the auxiliary magnetic field Hx • 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 and vehicle-type sensing • Measurement of current in a conductor without connection PINOUT ORDERING INFORMATION DEVICE BOX ZMZ20 Bulk in box (2,000 components per box) DEVICE MARKING • M20 SIDE VIEW ISSUE 2 - JANUARY 2004 1 SEMICONDUCTORS ZMZ20 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL LIMIT UNIT Supply voltage VB 12 V Total power dissipation P TOT 120 mW Operating temperature range T amb -40 to +150 °C ELECTRICAL CHARACTERISTICS (at Tamb = 25°C and Hx=3kA/m unless otherwise stated) PARAMETER SYMBO MIN. TYP. MAX. UNIT Bridge resistance R br 1.2 1.7 2.2 k⍀ Output voltage range V O /V B 16 20 24 mV/V Open circuit sensitivity S 3.7 4.7 5.7 Hysteresis of output voltage V OH /V B - - 50 µV/V Offset voltage V off /V B -1.0 - +1.0 mV/V 0 - Operating frequency f max Temperature coefficient of offset voltages TCV off Temperature coefficient of bridge resistance Temperature coefficient of open circuit sensitivity CONDITIONS (mV/V)/(kA/m) No disturbing field H d allowed Hy = 2kA/m 1 MHz +3 (µV/V)/K T amb = -25 to +125°C -3 - TCR br 0.25 0.3 0.35 %/K T amb = -25 to +125°C TCS V -0.25 -0.3 -0.35 %/K T amb = -25 to +125°C TCS I - -0.1 - %/K Tamb = -25 to +125°C V B =5V Temperature coefficient of open circuit sensitivity I B =3mA ISSUE 2 - JANUARY 2004 SEMICONDUCTORS 2 ZMZ20 Application 1 (digital output) +Ub 22k 1M 4 10k 10k 8 3 10k 1 ZMZ20 6 10k - 5 + U1B 7 TL072 22k 1 out TL072 4 10k 2 U1A 3 + 2 - 10k GND Application 2 (analog output) +Ub 5 + U1B 7 6 TL074 4 1 ZMZ20 R4 10k R1 100k R3 10k 9 10 + U1C TL074 8 30k 13 - U1D 14 12 + TL074 3 2 R6 R2 100k R5 10k 4 3 + U1A 1 2 TL074 1 1 Uo R7 30k GND -Ub ISSUE 2 - JANUARY 2004 3 SEMICONDUCTORS ZMZ20 ISSUE 2 - JANUARY 2004 SEMICONDUCTORS 4 ZMZ20 ISSUE 2 - JANUARY 2004 5 SEMICONDUCTORS ZMZ20 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 2003 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 - JANUARY 2004 SEMICONDUCTORS 6