WEBVTT

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Hello.
Today we have a preview of

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a new kind of rotational sensor:
NVE's "ADT"

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tunneling magnetoresistance sensor.

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These remarkable sensors
provide

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four precise rotational reference points.

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Revolutionary Tunneling Magnetoresistance
technology

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provides precise, low-power rotation sensing.

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This demo board
is powered by a

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button-cell battery.

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The sensor is here:

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Simple circuitry
drives LEDs

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to show the rotation quadrant.

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Here's the schematic:

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It uses a simple 2-to-4 decoder

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and a buffer to drive the LEDs.

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Here's the ADT sensor truth table:

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As it shows,
the outputs define

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the quadrant of rotation.

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We're demonstrating with
a round horseshoe magnet

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like this one,
but you can use any

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diametrical magnet.

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As the magnet turns,
sine and cosine outputs

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track the rotation,
and the rotation quadrant.

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As you can see,
as we reverse the direction,

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we have very little hysteresis...

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And the phasing of the quadrature outputs
allow you to detect direction.

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Key features of the ADT001-10E are:

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Precision digital quadrature outputs;

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wide airgap tolerance;

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integrated fault detection;

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extremely low power;

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-40 to 125 Celsius operating range;

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and an ultraminiature TDFN6 package.

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Click, e-mail, or call us for more information,

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or to order parts or demonstration kits.