A16100: Three-Wire Differential Camshaft Sensor, Programmable Threshold


The A16100 is a combined Hall-effect sensing integrated circuit and EMC protection circuit that provides a user-friendly, PCB-less solution for camshaft applications.

The A16100 incorporates a dual element Hall IC that switches in response to differential magnetic signals created by a ferromagnetic target. The IC contains a sophisticated compensating circuit designed to eliminate the detrimental effects of magnet and system offsets. Digital processing of the analog signal provides zero-speed performance independent of air gap and also dynamic adaptation of device performance to the typical operating conditions found in automotive applications (reduced vibration sensitivity). High-resolution peak detecting DACs are used to set the adaptive switching thresholds of the device. Hysteresis in the thresholds reduces the negative effects of any anomalies in the magnetic signal associated with the targets used in many automotive applications.

Customer-programmable thresholds allow fine adjustment of switchpoints for compensation of mechanical tolerances.
Customer-programmable options through EEPROM allow for performance optimization to meet specific application requirements.

The A16100 is available in a lead (Pb) free 3-pin SIP package with a 100% matte-tin-plated lead-frame.

Top Features

  • Allegro UC package with integrated EMC components provides robustness to most automotive EMC requirements
  • Optimized robustness against magnetic offset variation
  • Small signal lockout for immunity against vibration
  • True zero-speed operation
  • Air gap independent switchpoints
  • Large operating air gaps achieved through use of gain adjust and offset adjust circuitry
  • Customer-programmable switchpoints for mechanical tolerances compensation
  • EEPROM programming for performance optimization and production traceability
  • Differential sensing provides stray field immunity

Typical Applications

  • Camshaft

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Part Composition /
RoHS Data
Comments Samples Check Stock
A16100PUCCTN 3-lead SIP -40°C to 160°C Yes View Data Contact your
local sales rep
Distributor Stock

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