AG003-01E NVE, AG003-01E Datasheet - Page 113

• Manufacturer Part Number: AG003-01E
• Description: ASSEMBLY CURRENT SENSOR EVAL
• Manufacturer: NVE

Specifications of AG003-01E

• Sensor Type: Magnetic. GMR (Giant Magnetoresistive)
• Interface: Analog
• Embedded: No
• Utilized Ic / Part: AA Series Current Sensors
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Sensitivity: -
• Sensing Range: -
• Other names: 391-1060

GT Sensor Operation with Magnetic Encoders
Magnetic encoders generate their own magnetic field, so they are much easier to work with than gear
tooth wheels, as no bias magnet is required for the sensor. Also, magnetic encoders have alternating
north and south magnetic poles on their faces. Therefore the magnetic field is generated by the moving
body, and sensor offset problems are greatly reduced. The following drawing shows a GT Sensor
response to a magnetic encoder:
Note that in this case, as long as the sensor is positioned symmetrically with the encoder, offset is
minimized. Also note that the GT Sensor provides one full sine wave output for each magnetic pole.
This is double the frequency of a Hall effect sensor, which provides one full sine wave output for each
north-south pole pair. As a result, replacing a Hall sensor with a GT sensor doubles the resolution of
the output signal.
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S
GMR Sensor
Resistors R3, R4
GMR Sensor
Resistors R3, R4
GMR Sensor
Resistors R3, R4
GMR Sensor
Resistors R3, R4
S
www.nve.com
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N
N
N
Direction of Sensitivity
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phone: [phone] fax: [phone]
S
S
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S
S
GMR Sensor
Resistors R1, R2
GMR Sensor
Resistors R1, R2
GMR Sensor
Resistors R1, R2
GMR Sensor
Resistors R1, R2
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N
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Application Notes
Voltage Output of
GMR Bridge
Voltage Output of
GMR Bridge
Voltage Output of
GMR Bridge
Voltage Output of
GMR Bridge
Rotation
Rotation
Rotation
Rotation