ZMT32
Magnetic Field Angle Sensor
Description
The ZMT32 is a thin film permalloy magnetic The precise ZMT32 works with low field
field sensor, which contains two galvanic applications (H = 8 to 25kA/m), much lower
rot
isolated Wheatstone Bridges for high than similar devices. The ultimate output signal
precision angle measurement applications quality depends on the external magnetic
under low field conditions. This angle sensor material and on the mechanical realization.
is based on the anisotropic magnetoresistive
effect (AMR). The two internal (V
, V
)
CC1
CC2
bridges enclose a relative sensitive angle of The ZMT32 is a passive part and the Arc-
45 degrees. The input field is a rotating Tangent interpolation needs external signal
magnetic field in the chip plane (parallel to processing. Typical areas of application are
the surface of package). This rotating field will angle and speed measurement.
make available two independent sinusoidal
output signals with the following relationship
VO2 Sin
(
2α
)
= Tan
=
(
2α
)
VO1 Cos
2α
where α = angle between sensor axis and field
direction
Features
Applications
•
•
contactless angle measurement up to 180°
•
•
•
angle and angular velocity measuring systems
absolute angle and angle change
flexible measuring solutions for moved
systems
automotive electronic (steering, throttle
control, pedal positioning, etc
•
•
stable operation over long time
high temperature range up to +160°C
•
•
contactless rotary switches and potentiometer
automatic adjustment
8
7
6
5
1
2
3
4
GND (bridge 1)
GND2 (bridge 2)
+VO2 (sin)
-VO1(cos)
-VO2 (sin)
VCC2(bridge 2)
V
CC1 (bridge 1)
+VO1 (cos)
Ordering Information
Device
Reel size
(Inches)
Tape width
(mm)
Quantity
per reel
Device
marking
ZMT32TA
7
12
1,000
ZETEX
ZMT32
Issue 1 - June 2008
© Zetex Semiconductors plc 2008
1
www.zetex.com