ZMY20M MAGNETIC FIELD SENSOR WITH INTERNAL MAGNET DESCRIPTION The ZMY20M is an extremely sensitive magnetic sensor employing the magneto-resistive effect of thin film permalloy. It allows the measurement of magnetic fields or the detection of magnetic parts. The highly sensitive and small size magnetoresistive sensors consist of chip covered with thin film permalloy stripes. These stripes form a Wheatstone bridge, whose output voltage is proportional to the magnetic field component Hy. The required perpendicular field Hx which is necessary to stabilize sensor operation, is created by an internal permanent magnet. FEATURES • Package: SOT223 • Supply voltage 12V • Internal magnet for creation of auxiliary field Hx • Available on 12mm tape APPLICATIONS • Linear position measurement • Angular position measurement • Navigation (electronic compass) • Revolution measurement ORDERING INFORMATION DEVICE REEL SIZE TAPE WIDTH QUANTITY PER REEL 7” 12mm 1,000 12mm 4,000 ZMY20MTA ZMY20MTC 13” DEVICE MARKING • ZMY20M ISSUE 2 - JANUARY 2004 1 SEMICONDUCTORS ZMY20M 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 Storage temperature range T stg -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⍀ CONDITIONS Output voltage range V O /V B 12 18 24 mV/V Auxiliary field Hx - 2 - kA/m Disturbing field Hd - - 30 kA/m Open circuit sensitivity S 3.0 5.5 7.0 Hysteresis of output voltage V OH /V B - - 50 V/V 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 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 V B = 5V TCS V -0.25 -0.3 -0.35 %/K T amb = -25 to +125°C Temperature coefficient of open circuit sensitivity I B = 3mA TCS I - 0.05 - %/K T amb = -25 to +125°C (mV/V)/ No disturbing field (kA/m) H d allowed V B = const. Hy ⱕ 2kA/m (V/V)/K T amb = -25 to +125°C ISSUE 2 - JANUARY 2004 SEMICONDUCTORS 2 ZMY20M ISSUE 2 - JANUARY 2004 3 SEMICONDUCTORS ZMY20M PACKAGE OUTLINE Controlling dimensions are in millimeters. Approximate conversions are given in inches PACKAGE DIMENSIONS Millimeters Inches DIM Millimeters Inches DIM Min Max Min Max Min Max Min Max A - 1.80 - 0.071 e 2.30 BSC 0.0905 BSC A1 0.02 0.10 0.0008 0.004 e1 4.60 BSC 0.181 BSC b 0.66 0.84 0.026 0.033 E b2 2.90 3.10 0.114 0.122 C 0.23 0.33 0.009 0.013 D 6.30 6.70 0.248 0.264 6.70 7.30 0.264 0.287 E1 3.30 3.70 0.130 0.146 L 0.90 - 0.355 - - - - - - © 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 4