The LM1815M/NOPB with Sensor Interface ADAPTIVE VARIABLE RELUCTANCE SENSR AMP is manufactured by Texas Instruments and is a sensor interface integrated circuit (IC). It is used to convert analog signals into digital signals and provide the necessary signal conditioning for a variety of speed sensors. The LM1815M/NOPB features an adaptive variable reluctance sensing amplifier that can be used to measure speed, direction of rotation, and position of a rotating shaft with increased sensitivity and accuracy. Additionally, the integrated circuit includes integrated Schmitt trigger protection circuitry, allowing users to reliably detect and measure speed, position, and direction of rotation with improved stability.