ATS682 Speed Sensor IC

The integrated circuit incorporates a dual-element Hall-effect circuit and signal processing that switches in response to differential magnetic signals created by ferrous gear teeth. The circuitry contains a sophisticated digital circuit that reduces magnet and system offsets, calibrates the gain for air gap independent switchpoints and provides true zero-speed operation.

The ATS682LSH is a Hall-effect integrated circuit and rare earth pellet combination that provides a user-friendly solution for true zero-speed digital gear-tooth sensing in two-wire applications. This small package, with an optimized two-wire leadframe, can be easily assembled and used in conjunction with a wide variety of gear shapes and sizes.

• Automatic Gain Control (AGC) for air gap independent switchpoints
• Automatic Offset Adjustment (AOA) for signal processing optimization
• Running-mode calibration for continuous optimization
• Precise duty cycle over operating temperature range
• Internal current regulator for two-wire operation
• Undervoltage lockout
• On-chip voltage regulator with wide operating voltage range and stability in the presence of a variety of complex load impedances
• Single chip IC for high reliability