Position and Velocity Transducers

Digital inductive position, velocity and direction sensor PO2210

(Posic)

Applications:

Rotary Position Sensors

Displacement Measurement - Contact

The inductive micro-sensor is an integrated version of the LVDT and resolver type of sensors. The core is a sensor chip with one generator coil and two sets of detection coils. The detection coils are connected in a differential arrangement, to reject the common mode signal. The sensor also includes an electronic interface, which is composed of a high frequency excitation for the generator coil and two read-out channels for the two sets of detection coils (channels A and B). The read-out electronics extract the amplitude variation of the high frequency signal due to the presence of a metallic target. The output stage consists of a low-pass filter and a comparator. For a nominal target period of 1.3 – 1.5 mm (module 0.4 – 0.5), the outputs are two.

Features

• Position, speed and direction on gear targets
• Robust in oil, water, dust, magnetic fields, etc.
• No magnet required
• Target in any metallic material (steel, alu, copper)
• Ultra-thin package, 1.8 mm thick
• 0 to 1 mm distance between sensor and target
• -40°C to +125°C operating temperature range
• 0 to 10 kHz frequency range
• 5V / 15 mA

Applications

• Angular incremental encoder
• Position and speed control in electric motors
• Motion control for robotics, factory automation

Automotive: electric steering, electric braking