SEMICONDUCTORS
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
magnetoresistivesensorsconsistofchipcoveredwiththinfilm
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
DEVICE MARKING
•ZMY20M
ZMY20M
ISSUE 2 - JANUARY 2004
MAGNETIC FIELD SENSOR WITH INTERNAL MAGNET
1
DEVICE REEL
SIZE TAPE WIDTH QUANTITY PER
REEL
ZMY20MTA 7” 12mm 1,000
ZMY20MTC 13” 12mm 4,000
ORDERING INFORMATION
ZMY20M
SEMICONDUCTORS
ISSUE 2 - JANUARY 2004
2
PARAMETER SYMBOL LIMIT UNIT
Supply voltage VB12 V
Total power dissipation PTOT 120 mW
Operating temperature range Tamb -25 to +125 °C
Storage temperature range Tstg -25 to +125 °C
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL MIN. TYP. MAX. UNIT CONDITIONS
Bridge resistance Rbr 1.2 1.7 2.2 k⍀
Output voltage range VO/VB12 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 (mV/V)/
(kA/m) No disturbing field
Hdallowed
VB= const.
Hysteresis of output voltage VOH/VB--50␮V/V Hy ⱕ2kA/m
Offset voltage Voff/VB-1.5 - +1.5 mV/V
Operating frequency fmax 0 - 1 MHz
Temperature coefficient of
offset voltages TCVoff -3 - +3 (␮V/V)/K Tamb = -25 to +125°C
Temperature coefficient of
bridge resistance TCRbr 0.25 0.3 0.35 %/K Tamb = -25 to +125°C
Temperature coefficient of
open circuit sensitivity
VB=5V
TCSV-0.25 -0.3 -0.35 %/K Tamb = -25 to +125°C
Temperature coefficient of
open circuit sensitivity
IB= 3mA
TCSI- 0.05 - %/K Tamb = -25 to +125°C
ELECTRICAL CHARACTERISTICS (at Tamb = 25°C unless otherwise stated)
ZMY20M
SEMICONDUCTORS
ISSUE 2 - JANUARY 2004
3
ZMY20M
SEMICONDUCTORS
4
ISSUE 2 - JANUARY 2004
Europe
Zetex GmbH
Streitfeldstraße 19
D-81673 München
Germany
Telefon: (49) 89 45 49 49 0
Fax: (49) 89 45 49 49 49
europe.sales@zetex.com
Americas
Zetex Inc
700 Veterans Memorial Hwy
Hauppauge, NY 11788
USA
Telephone: (1) 631 360 2222
Fax: (1) 631 360 8222
usa.sales@zetex.com
Asia Pacific
Zetex (Asia) Ltd
3701-04 Metroplaza Tower 1
Hing Fong Road, Kwai Fong
Hong Kong
Telephone: (852) 26100 611
Fax: (852) 24250 494
asia.sales@zetex.com
Corporate Headquaters
Zetex plc
Fields New Road, Chadderton
Oldham, OL9 8NP
United Kingdom
Telephone (44) 161 622 4444
Fax: (44) 161 622 4446
hq@zetex.com
These offices are supported by agents and distributors in major countries world-wide.
Thispublicationisissuedtoprovideoutlineinformationonlywhich(unlessagreedbytheCompanyinwriting)maynotbeused,appliedorreproduced
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
© Zetex plc 2003
Controlling dimensions are in millimeters. Approximate conversions are given in inches
PACKAGE OUTLINE
DIM Millimeters Inches DIM Millimeters Inches
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 6.70 7.30 0.264 0.287
b2 2.90 3.10 0.114 0.122 E1 3.30 3.70 0.130 0.146
C 0.23 0.33 0.009 0.013 L 0.90 - 0.355 -
D 6.30 6.70 0.248 0.264 - ----
PACKAGE DIMENSIONS