AAV Sensors

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AAV Sensors

Features:

•

Operates in Magnetic Saturation, 30 to 200 Gauss

•

Half-Bridge or Individual Resistor Configurations

•

Sine and Cosine Outputs Available

•

Utilizes Spin Valve GMR Material

•

Precise Detection of Magnetic Field

•

Ultra-Small PLLP Package

•

Cannot Be Damaged by Large External Magnetic Fields

Description:

The AAV001-11 and AAV002-11 are arrays of four GMR resistors rotated at 90-degree intervals in

the package. The AAV001-11 features independent resistors that can be wired together to form two

half-bridges, or used as independent resistors. The AAV002-11 has the bridge connections made

internally to the package. For either part, the output can be configured to represent the sine and cosine

function of the magnetic field being applied to the sensor. Each resistor is 1.5 k

Ω nominal resistance

and output of each half-bridge is ratiometric with the power supply voltage. The part features NVE’s

PLLP6 housing, which is a 3.0 mm x 3.0 mm x 0.9 mm thick surface mount package.

Operation:

The sensor elements contain two magnetic layers: a pinned, or fixed-direction layer, and a movable or

free layer. The diagram below illustrates the configuration with arrows representing the two layers:

Angle Between Pinned

and Free Layers

Determines Electrical

Resistance of Sensor

Free Layer Aligns

with the Applied

Magnetic Field