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SEMICO NDUC TORS

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

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

Top View

PINOUT

Hy

Hx

SOT223S