MAXIM MAX9927AEE/V+T

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. The MAX9926/MAX9927 are dual versions of the MAX9924/MAX9925, respectively. The MAX9924/ MAX9926 combine matched resistors with a CMOS input precision operational amplifier to give high CMRR over a wide range of input frequencies and temperatures. The MAX9924/MAX9926 differential amplifiers provide a fixed gain of 1V/V. The MAX9925/MAX9927 make all three terminals of the internal operational amplifier available, allowing greater flexibility for gain. The MAX9926 also provides a direction output that is useful for quadrature - connected VR sensors that are used in certain high - performance engines. These devices interface with both new - generation differential VR sensors as well as legacy single - ended VR sensors. The MAX9924/MAX9925 are available in the 10 - pin μMAX package, while the MAX9926/MAX9927 are available in the 16 - pin QSOP package. All devices are specified over the - 40℃ to +125℃ automotive temperature range.

• 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

• Camshaft VRS Interfaces
• Crankshaft VRS Interfaces
• Vehicle Speed VRS Interfaces