ADT001/ADT002 Rotation Sensors
ADT00X-10E Ultralow Power Rotation Sensors
Features
• Tunneling Magnetoresistance (TMR) technology
• Extremely low power (1.8 μA typ. at 2.4 V)
• Precision digital quadrant outputs
• Wide airgap tolerance
• Operates with as little as 30 Oersteds of magnetic field
• Integrated fault detection
• 2.4 V to 5.5 V supply range
• −40°C to +125°C operating range
• Ultraminiature TDFN6 packages
Functional Diagram and Pinout
Vdd
Sin
FAULT
Ro
Angular
Sensor
Fault
Sensor
Truth Table
Angle
0 -90
90 -180
180 -270
270 -360
Output
Sin Cos
HH
HL
LL
LH
Applications
• Water meters
• Rotational speed sensors
• Rotational position sensors
GND
Cos
N/C
(for test
only)
Description
The ADT001 and ADT002 rotation sensors are ultralow
power, digital-output magnetic rotation sensors.
Tunneling Magnetoresistance (TMR) technology allows
small size and low power, making the sensors ideal for
battery operation.
The sensors have two digital, binary outputs. The two
outputs are 90 degrees out of phase to provide directional
information.
An additional output indicates a fault if the magnetic field is
too high for accurate measurements.
The ADT001 is optimized for edge-sensitive applications
and the ADT002 for absolute position. The ADT001 has
high hysteresis for noise immunity in applications such as
speed sensing and counting rotations. The ADT002 is low
hysteresis to provide accurate, absolute rotational quadrant
information.
The parts are packaged in NVE’s 2.5 mm x 2.5 mm x
0.8 mm TDFN6 surface-mount package.
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NVE Corporation 11409 Valley View Road, Eden Prairie, MN 55344-3617 Phone: (952) 829-9217 Fax: (952) 829-9189 www.nve.com ©NVE Corporation
