AA004-00E Datasheet, PDF (14/16 Pages) List of Unclassifed Manufacturers – AA and AB-Series Analog Sensors

AB Sensors
General Characteristics:
Parameter
Min
Input Voltage Range
<1⁴
Operating Frequency
DC
Operating Temperature Range
-50
Bridge Electrical Offset
-4
Signal Output at Max. Field
Nonlinearity
Hysteresis
TCR
TCOI
TCOV
Off Axis Characteristic
ESD Tolerance
Typical
120
+0.14
+0.03
-0.1
Cos β⁷
400
Max
±12.5⁴
>1
125
+4
2
4
Unit
Volts
MHz
°C
mV/V
mV/V
% (unipolar)⁵
% (unipolar)⁵
% / °C⁶
% / °C⁶
% / °C⁶
V pin-to-pin HBM
Notes:
1. 1 Oersted (Oe) = 1 Gauss in air.
2. See the Appendix for package dimensions and tolerances.
3. Sensors can be provided in die form by special request.
4. GMR AB-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.
5. 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.
6. 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.
7. Beta (β) is any angle deviation from the sensitive axis.
Typical Gradiometer Transfer Function
50
40
30
-400Increasing -f2ie0l0d
on Y resistors
20
10
0
-10 ⁰
-20
Increasing field
on X resistors
200
400
-30
The Figure at left is a
simulated output from an
NVE Gradiometer. The
output / gradient
correlation shown
assumes one pair of
resistors is held at zero
field. Note the bipolar
output.
-40
-50
Magnetic Field Applied to Resistors
- 25 -
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