The A1642 is an optimized Hall effect sensing integrated circuit that provides a user-friendly solution for true zero-speed digital ring-magnet sensing in two-wire applications. This small package can be easily assembled and used in conjunction with a wide variety of target shapes and sizes.

FEATUREs and Benefits
• Running mode calibration for continu ous optimization
• Single chip IC for high reliability
• Internal current regulator for 2-wire operation
• Precise duty cycle signal over operating temperature range
• Large operating air gaps
• Automatic Gain Control (AGC) for air gap independent switchpoints
• Automatic Offset Adjustment (AOA) for signal processing optimization
• True zero-speed operation
• Undervoltage lockout
• Wide operating voltage range