NVE’s AAT003-10E angle sensors use unique Tunnelling Magnetoresistance (TMR) elements for large signals and low power consumption. This sensor is a low-resistance version with a typical bridge resistance of 40KΩ, the lower device resistance reduces Johnson noise, and is also ideal for direct microcontroller interfaces because the lower output impedance can quickly charge microcontroller sample-and-hold input stages. The sensor provides sine and cosine signals defining the angle of rotation. Outputs are proportional to the supply voltage and peak-to-peak output voltages are much larger than conventional sensor technologies.
The AAT003-10E sensor contains four sensing resistors at 90° intervals. The resistors are connected as two half-bridges providing the sine and cosine voltage outputs. For each half bridge the resistance of one element increases and the other decreases as the field rotates, thus the bridge resistance, device resistance and output impedances remain constant with rotation
Typical applications for the ATT series include:
Battery powered applications
Knob position sensors, rotary encoders
Automotive rotary position sensors
Motor shaft position sensors
The below table gives the full specifications of the NVE AAT angle sensor series including the AAT003-10E:
1. Large magnetic fields CANNOT damage NVE sensors.
2. “Fixed Bias” means a fixed airgap between the bias magnet and sensor so the magnetic field at the sensor is constant.
3. “Variable Bias” means the magnetic field strength at the sensor can vary across the specification range.
4. Maximum deviation of either output from an ideal sine wave.
We are pleased to provide you with a range of additional content including videos, product datasheets, case studies, white papers and application notes for your reference. Please see below for the latest content available:
NVE put an angle sensor on a remote-control Lego car to demonstrate the sensor's awesome precision and airgap tolerance. The AAT series sensor has a precision better than one degree, which is about 1/64" for the 2" diameter Lego wheels. AAT Sensors are "awesome" for motion control because they allow wide magnet airgaps for simple positioning, large output signals and low output impedance allow direct interface to microcontrollers like Arduinos. They are absolute rather than relative sensors, and they're small.
Angle Sensor Live Demonstration
NVE's Jay Brown demonstrates that AAT-Series TMR sensors are extremely small, sensitive, and low power.
Arduino Angle Sensor Demo (short version)
The AAT003 non-contact angle sensor in a stepper motor servo system. This demonstration shows the unique capabilities of AAT-Series tunneling magnetoresistance sensors. NVE use a simple Arduino controller with a modified clock as a position indicator.
VIDEOS
Angle Sensor on a Lego Car
NVE put an angle sensor on a remote-control Lego car to demonstrate the sensor's awesome precision and airgap tolerance. The AAT series sensor has a precision better than one degree, which is about 1/64" for the 2" diameter Lego wheels. AAT Sensors are "awesome" for motion control because they allow wide magnet airgaps for simple positioning, large output signals and low output impedance allow direct interface to microcontrollers like Arduinos. They are absolute rather than relative sensors, and they're small.
Angle Sensor Live Demonstration
NVE's Jay Brown demonstrates that AAT-Series TMR sensors are extremely small, sensitive, and low power.
Arduino Angle Sensor Demo (short version)
The AAT003 non-contact angle sensor in a stepper motor servo system. This demonstration shows the unique capabilities of AAT-Series tunneling magnetoresistance sensors. NVE use a simple Arduino controller with a modified clock as a position indicator.
Please be advised that due to the ongoing supply issues with raw materials affecting the global electronics industry, as well as an increase in orders received by our manufacturing partners, a large number of products are facing increased lead times in recent months. For the latest lead time and stock availability, please contact one of our engineers who will be happy to discuss lead times further and the potential for alternative parts.
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