ZMT32TA Diodes Zetex, ZMT32TA Datasheet - Page 5

• Manufacturer Part Number: ZMT32TA
• Manufacturer: Diodes Zetex

Specifications of ZMT32TA

• Operating Temperature (min): -40C
• Operating Supply Voltage (typ): 5V
• Lead Free Status / Rohs Status: Compliant

Operating principle
Characteristic output curves V
Issue 1 - June 2008
© Zetex Semiconductors plc 2008
-V
-V
V
V
cc2
cc1
O1
O2
-10
-15
10
0
-5
5
0
O
0
H
1
rot
45
1
90
GND1
GND2
+V
+V
O1
O2
O1
, V
135
O2
180
When a common-magnetic field is applied through the
ZMT32 the 2 internal magneto-resistive bridges are
affected slightly differently due to their 45° rotation to
one another. This 45° rotation enables the ZMT32 to
determine angular position, of a rotating magnetic
field.
When a rotating magnetic field is applied to the ZMT32
it will output 2 sinusoidal voltages that are:
•
•
•
•
By taking the arcTan of the ratio of V
angular position of the magnetic field can be
determined.
Sensor bridge 2
Sensor bridge 1
proportional to the field strength applied
proportional to the supply voltage applied,
rotating at twice the angular position
90° apart (as seen below).
5
= 0°
225
270
GND1
8
1
- V
O1
Bridge
315
1
GND2
7
2
-V
360
O2
Cos 2
Sin 2
Bridge
3
V
+V
6
2
CC2
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O2
O2
ZMT32
to V
+V
5
4
V
CC1
O1
O1
the