1
DESCRIPTION
The ZMY20 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 a chip covered with thin film
permalloy stripes. These stripes form a Wheatstone bridge, whose output
voltage is proportional to the magnetic field component Hy. A perpendicular
field Hx is necessary to stabilize sensor operation. This can be done by using a
small permanent magnet.
FEATURES
•
Output voltage proportional to magnetic field Hy
•
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 &
speed sensing
•
Metering of fluids by sensing rotation of impeller
•
Traffic counting & vehicle-type sensing
•
Measurement of current in a conductor without
connection
DEVICE MARKING
•
ZMY20
ZMY20
ISSUE 3 - JUNE 2007
MAGNETIC FIELD SENSOR
DEVICE REEL
SIZE
TAPE
WIDTH
QUANTITY
PER REEL
ZMY20TA 7” 12mm 1000 units
ZMY20TC 13” 12mm 4000 units
ORDERING INFORMATION
V = SUPPLY VOLTAGE
V = OUTPUT VOLTAGE
B
O
+V
B
-V
B
-V
O
+V
O
Top View
PINOUT
+V
O
+V
B
-V
O
-V
B
Hy
Hx
SOT223S
