CH502

DESCRIPTION

The CH502 is gear tooth sensor IC for use in automotive camshaft sensing. CH502 is used with a 

bias magnet south facing the back (no mark) side of the IC. The technology used for the IC is Halleffect based. The Chip incorporate Hall Effect plate, an A/D converter with self-calibrates the internal 

gain of the device to adjust the air-gap variations. And digital sample and hold circuit. , Schmitt trigger 

and an open drain output with short circuit protected.

As the gear tooth rotate, the chip samples an in increasing or decreasing flux density. When the 

flux has reached its minimum value and increased hysteresis flux, the output will turn on (BOP).When 

the flux has reached its maximum value and decreased hysteresis flux, the output will turn off(BRP).

The CH502 is ideal for use in gather speed, position and direction detection to those gear-tooth 

based configurations. Particularly suited to those applications that require accurate duty cycle or 

accurate edge detection, such as automotive camshaft sensing.

FEATURES

• Geartooth Sensor 

• Zero Speed Detection 

• Insensitive to Orientation 

• High speed operation Frequency

• Short Circuit Protection 

• Self-Adjusting Magnetic Range 

• On-chip 10 bit A/D Converter 

• No Chopper Delay 

• RoHs Compliant 2011/65/EU

APPLICATIONS

-Geartooth Sensor 

-Speed Sensor 

-Camshaft Sensor 

-Direction Detection* 

*See applications example