General Description

The MAX9924–MAX9927 variable reluctance (VR or magnetic coil) sensor interface devices are ideal for position and speed sensing for automotive crankshafts, camshafts, transmission shafts, etc. These devices integrate a precision amplifier and comparator with selectable adaptive peak threshold and zero-crossing circuit blocks that generate robust output pulses even in the presence of substantial system noise or extremely weak VR signals.

Features

♦ Differential Input Stage Provides Enhanced Noise Immunity

♦ Precision Amplifier and Comparator Allows Small-Signal Detection

♦ User-Enabled Internal Adaptive Peak Threshold or Flexible External Threshold

♦ Zero-Crossing Detection Provides Accurate Phase Information

Applications

    Camshaft VRS Interfaces

    Crankshaft VRS Interfaces

    Vehicle Speed VRS Interfaces