ETC ABH001-00

AB Sensors
AB Sensors
Features:
⇒
⇒
⇒
⇒
⇒
⇒
⇒
Excellent Sensitivity to Applied Magnetic Fields
Wheatstone Bridge Analog Output
Temperature Tolerance to 125°C Continuous
Wide Linear Range of Operation
Near-Zero Voltage Operation
DC to >1MHz Frequency Response
Small, Low Profile Surface Mount Packages
Applications:
⇒ General Differential Field Sensing
⇒ Gear Tooth and Encoder Speed and Position Sensing
⇒ Low Power, Low Voltage Applications
Description:
The AB series GMR sensors are general purpose gradiometers for use in a wide variety
of applications. Two pairs of unshielded GMR sensor elements provide for directional
sensing of small gradients in large and small magnetic fields. The ability to detect only
magnetic gradients allows low sensitivity to external sources of uniform magnetic field,
allowing these sensors to work successfully in high magnetic noise environments, such as
near electric motors or current carrying wires.
V+ (supply)
Pin-out
OUT B
Functional Block diagram
pin 8, V+(supply)
NVE
ABxxx
-02
X
Orientation
chamfer
GMR
Y
Y
pin 5, OUT B
X
OUT A
X
V- (ground)
Y
pin 1, OUT A
pin 4, V(ground)
Axis of Sensitivity
Magnetic Characteristics:
Part
Number
Saturation
Field (Oe1)
AB001-02
AB001-00
250
250
Linear
Range
(|Oe1|)
Min
Max
20
200
20
200
Resistor
Sensitivity
(%R / Oe 1)
Min
Max
0.02 0.03
0.02 0.03
Resistance
(Ohms)
Package 2
Die Size 3
(µm)
2.5K+/-20%
2.5K+/-20%
SOIC8
MSOP8
651x1231
651x1231
RHOPOINT COMPONENTS
Tel: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255
Web: www.rhopointcomponents.com Email: sales@rhopointcomponents.com
AB Sensors
General Characteristics:
Property
Input Voltage Range
Operating Frequency
Operating Temperature Range
Bridge Electrical Offset
Signal Output at Max. Field
Nonlinearity
Hysteresis
TCR
TCOI
TCOV
Off Axis Characteristic
ESD Tolerance
Min
<14
DC
-50
-4
Typical
Max
±12.54
>1
125
+4
120
2
4
+0.14
+0.03
-0.1
Cos β 7
400
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 from the sensitive axis.
Typical Gradiometer Transfer Function
Differential Voltage Out of Sensor (mV)
50
40
30
20
Increasing field
on X resistors
10
0
-400Increasing -200
field
on Y resistors
-10
0
200
-20
-30
-40
400
The Figure to the 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.
-50
Magnetic Field Applied to Resistors
RHOPOINT COMPONENTS
Tel: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255
Web: www.rhopointcomponents.com Email: sales@rhopointcomponents.com
ABH Sensors
ABH Sensors
Features:
⇒
⇒
⇒
⇒
⇒
⇒
⇒
Extremely High Sensitivity to Applied Magnetic Fields
Wheatstone Bridge Analog Output
Temperature Tolerance to 150°C Continuous
Wide Linear Range of Operation
Near-Zero Voltage Operation
DC to >1MHz Frequency Response
Small, Low Profile Surface Mount Packages
Applications:
⇒ General Differential Field Sensing
⇒ Gear Tooth and Encoder Speed and Position Sensing
⇒ Low Voltage, High Temperature Applications
Description:
The ABH series GMR sensors are low field, high temperature gradiometers for use in a
wide variety of applications. Two pairs of unshielded GMR sensor elements provide for
directional sensing of small gradients in large and small magnetic fields. The ability to
detect only magnetic gradients allows low sensitivity to external sources of uniform
magnetic field, allowing these sensors to work successfully in high magnetic noise
environments, such as near electric motors or current carrying wires.
V+ (supply)
Pin-out
OUT B
Functional Block diagram
pin 8, V+(supply)
NVE
ABxxx
-02
X
Orientation
chamfer
GMR
Y
Y
pin 5, OUT B
X
OUT A
X
V- (ground)
Y
pin 1, OUT A
pin 4, V(ground)
Axis of Sensitivity
Magnetic Characteristics:
Part
Number
Saturation
Field (Oe1)
ABH001-02
ABH001-00
70
70
Linear
Range
(|Oe1|)
Min
Max
5
40
5
40
Resistor
Sensitivity
(%R / Oe 1)
Min
Max
0.06 0.12
0.06 0.12
Resistance
(Ohms)
Package 2
Die Size 3
(µm)
1.2K+/-20%
1.2K+/-20%
SOIC8
MSOP8
651x1231
651x1231
RHOPOINT COMPONENTS
Tel: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255
Web: www.rhopointcomponents.com Email: sales@rhopointcomponents.com
ABH Sensors
General Characteristics:
Property
Input Voltage Range
Operating Frequency
Operating Temperature Range
Bridge Electrical Offset
Signal Output at Max. Field
Nonlinearity
Hysteresis
TCR
TCOI
TCOV
Off Axis Characteristic
ESD Tolerance
Min
<14
DC
-50
-4
Typical
Max
± 12.54
>1
150
+4
80
4
15
+0.30
-0.28
-0.40
Cos β 7
400
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 volt ages. 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 run the sensor. TCOV is the output change with
temperature, using a constant voltage source to run the sensor.
7. Beta (β) is any angle from the sensitive axis.
Typical Gradiometer Transfer Function
Differential Voltage Out of Sensor (mV)
50
40
30
20
Increasing field
on X resistors
10
0
-400Increasing -200
field
on Y resistors
-10
0
200
-20
-30
-40
-50
Magnetic Field Applied to Resistors
400
The Figure to the 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.
RHOPOINT COMPONENTS
Tel: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255
Web: www.rhopointcomponents.com Email: sales@rhopointcomponents.com