ABH Sensors

RHOPOINT COMPONENTS

Tel: +44 (0) 870 608 1188 Fax: +44 (0) 870 241 2255

Web: www.rhopointcomponents.com Email: sales@rhopointcomponents.com

General Characteristics:

Property

Min

Typical

Max

Unit

Input Voltage Range

<1

4

± 12.5

4

Volts

Operating Frequency

DC

> 1

MHz

Operating Temperature Range

-50

150

°C

Bridge Electrical Offset

-4

+4

mV/V

Signal Output at Max. Field

80

mV/V

Nonlinearity

4

% (unipolar)

5

Hysteresis

15

% (unipolar)

5

TCR

+0.30

% /

TCOI

-0.28

% /

TCOV

-0.40

% /

Off Axis Characteristic

Cos

ESD Tolerance

400

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.

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.

Typical Gradiometer Transfer Function

-50

-40

-30

-20

-10

0

10

20

30

40

50

-400

-200

0

200

400

Magnetic Field Applied to Resistors

Increasing field

on X resistors

Increasing field

on Y resistors