A16311: Self-Calibrating Automatic-TPOS Camshaft Speed Sensor IC


The A16311PUCA is a True Power-On State camshaft sensor incorporating an advanced fully synchronous digital IC and EMC protection circuit all in a single sensing solution.

The A16311 is a single element Hall-effect sensor IC which, when paired with a back-biasing magnetic circuit, switches in response to magnetic signals induced by a ferromagnetic target. The IC contains a sophisticated digital circuit designed to match the temperature behavior of the back-biasing magnet (either SmCo or NdFeB). Advanced signal processing is used to provide zero-speed performance independent of installation air gap and is designed for the typical operating conditions found in automotive camshaft sensing applications. The resulting output of the device is a digital representation of the ferromagnetic target profile.

The A16311 is highly programmable with many options to allow for performance optimization to meet specific application requirements.

The A16311 is provided in a 3-pin SIP package (UCA) that is lead (Pb) free, with 100% matte tin leadframe plating.

For applications that require an integrated back-bias magnet for directly measuring camshafts, please see the ATS16301.

Top Features

  • Allegro UC package with integrated EMC components reduces need for external EMI protection
  • True target state recognition at device power-on (TPOS) with automatic TPOS self-programming capability
  • EEPROM programming for performance optimization, temperature compensation, and production traceability
  • Chopper stabilization reduces offset drift

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Part Composition /
RoHS Data
Comments Samples Check Stock
A16311PUCA-SLTMU12BAL 3-lead SIP -40°C to 160°C -- View Data New Contact your
local sales rep
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.



3-pin SIP (suffix UC)