Camshaft Sensor ICs

camshaft position sensor, camshaft sensor, cam sensorAllegro’s portfolio of camshaft sensor ICs is well suited to meet the applications needs for True Power-On State (TPOS) and non-TPOS engine controller requirements. Both options are available in a back-biased Gear-Tooth Sensor (GTS) package from Allegro for the highest performance and easiest implementation. Programmability of the ICs allow for modification of performance to match the specific target and application requirements of the end customer.

Allegro’s TPOS sensor IC uses a single sensing Hall element and allows for twist-independent installation. The non-TPOS sensor IC uses a differential pair of Hall elements to improve performance with small-feature camshaft targets and larger air gaps.

Camshaft Position Sensor ICs Selection Guide

Part Number Supply Voltage (V) Output Type Power-On State Specified Air Gap Range (>20 Hz) Key Spec Min. Speed Packages
ATS601 3.3 to 24 3-wire High (off) 0.5 to 2.5 mm Timing accuracy Zero speed SG
ATS616 3.5 to 24 3-wire High (off) 0.4 to 2.5 mm Timing accuracy 10 Hz  SG 
ATS617 4.5 to 24 3-wire High (off) 0.4 to 2.5 mm Timing accuracy 10 Hz SG
ATS128 4.2 to 24 3-wire TPO 2.5 mm max User programmable switch point Zero speed SE
ATS675 3.3 to 26.5 3-wire TPO 0.5 to 3.0 mm Timing accuracy Zero speed SE
Temperature range code: L = -40°C to 150°C


The following devices are discontinued: ATS635LSEATS636LSE


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