GT Sensors Precision Gear Tooth and Encoder Sensors NVEs GT Sensor products are based on a Low Hysteresis GMR sensor material and are designed for use in industrial speed applications where magnetic detection of gear teeth and magnetic encoder wheels is required. GT Sensors with both analog and digital outputs are available. The analog parts feature the large signal and robust characteristics which NVEs GMR materials are known for (NVEs GMR sensors are not damaged by extremely large magnetic fields). The sensor elements themselves are designed to provide usable output with even the smallest gear teeth. Single and double output versions are available the second output is phase shifted with respect to the first, to provide quadrature for determining direction. The digital sensors take advantage of the high performance characteristics of GMR sensors to provide a 50% duty cycle output with a wide tolerance in airgap and temperature variations. GT Sensors are available in low-profile MSOP8, TDFN SO8, and TDFN6 packages, in order to fit into the tightest possible spaces. An evaluation kit is available, containing a selection of sensors, magnets, and PCBs, so that the user can test the parts in their application - 46 - www.nve.com phone: 952-829-9217 fax: 952-829-9189 ABL Sensors Single/Double Bridge Gear Tooth And Encoder Sensors Features: Large Airgap Direct Analog Output DC (Zero Speed) Operation Sine / Cosine Outputs Precise Spacing and Phase Shifting Between Sensor Elements Excellent Temperature and Voltage Performance Small, Low-Profile Surface Mount Packages Applications: Linear and Angular Speed Sensing Linear and Angular Position Sensing Direction Detection Description: The ABL-Series GT Sensors are differential sensor elements that provide an analog sinusoidal output signal when used with a bias magnet and gear tooth or a magnetic encoder. These chips use NVEs proprietary GMR sensor elements featuring an extremely large output signal from the raw sensor element, which is stable over the rated temperature and voltage range. As a result, ABL-Series GT Sensors feature excellent airgap performance and an extremely stable operating envelope as well as the robust reliability characteristics that NVE sensors are known for. Three different standard spacings are available for use with fine and coarse pitch encoders and gear teeth. Both single bridge and double bridge configurations are also available. Double bridges are used to generate sine/cosine outputs. In addition to the standard spacings, NVE can provide custom spacings and multiple sensor elements tailored to the individual customers application for a nominal design and tooling charge. Contact NVE for further details. For digital output applications, these sensors can be used with NVEs DD001-12 signal processing IC which converts their output into a 50% duty cycle modulated current signal. This IC allows placement of the ABL sensor in a very small housing with wires running from the sensor to the signal processing IC in a remote location. Thus ABL-Series sensors can be used in M8 and smaller housings. - 47 - www.nve.com phone: 952-829-9217 fax: 952-829-9189