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AA Sensors
General Characteristics:
<1
24
Parameter
Input Voltage Range
Operating Frequency
Operating Temperature Range
Bridge Electrical Offset
Min
4
DC
-50
-4
Typical
Max
4
>1
125
+4
Unit
Volts
MHz
° C
mV/V
Signal Output at Max. Field
Nonlinearity
Hysteresis
TCR
TCOI
TCOV
60
+0.14
+0.03
-0.1
2
4
mV/V
% (unipolar)
% (unipolar)
6
% / ° C
6
% / ° C
6
% / ° C
5
5
Off Axis Characteristic
ESD Tolerance
Notes:
Cos β
400
7
V pin-to-pin HBM
1.
2.
3.
4.
5.
6.
7.
1 Oersted (Oe) = 1 Gauss in air.
See the Appendix for package dimensions and tolerances.
Sensors can be provided in die form by special request.
GMR A A-Series sensors are pure ratiometric devices meaning that they will operate properly at extremely low supply
voltages . The output signal will be proportional to the supply voltage . Maximum voltage range is limited by the power
dissipation in the package and the maximum operating temperature of the sensor.
Unipolar operation means exposure to magnetic fields of one polarity, e.g. , 0 to 30 Gauss, or 2 to -50 Gauss, but not -20 to
+30 Gauss (bipolar operation) . Bipolar operation will increase nonlinearity and hysteresis.
TCR is resistance change with temperature with no applied field . TCOI is the output change with temperature using a
constant current source to power the sensor . TCOV is the output change with temperature using a constant voltage source
to power the sensor . See the graphs below.
Beta ( β ) is any angle deviation from the sensitive axis.
0.35
0.3
0.25
0.2
0.15
AA002 Temperature Performance,
1m A Curre nt Supply
0.35
0.3
0.25
0.2
0.15
AA002 Tem perature Performance, 5V Supply
0.1
0.05
0
-40C
25C
85C
125C
0.1
0.05
0
-40C
25C
85C
125C
-20
-15
-10
-5
0
5
10
15
20
-20
-15
-10
-5
0
5
10
15
20
-0.05
Applie d M agnetic Field (Oe)
-0.05
Applied Magnetic Field (Oe)
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