General Purpose Speed Sensor ICs

Allegro’s diverse selection of speed sensor ICs provide optimized solutions for many non-automotive applications where speed or speed and direction information are needed. These sensor ICs can handle designs using various target geometries, materials, and sensing orientations. Allegro’s portfolio of speed sensor ICs contains solutions able to address requirements for applications needing both high and low frequency operation, detection of rotational direction, and small signals operation.

Allegro’s solutions offer over two decades of specific IC design advancements. These sensor ICs also incorporate lessons learned through our close work in automotive applications where many unique operational issues have been discovered and resolved through algorithm advancements. Allegro’s industry leading algorithms provide optimized performance for both two-wire, current source; and three-wire, open drain output protocols.

General Purpose Speed Sensor ICs Selection Guide

Part Number Supply Voltage (V) Output Type Power-On State Specified Air Gap / Operating Signal Range Key Spec Min. Speed Packages
A1425 4 to 26.5 3-Wire High (output off) 50 to 1250 G Repeatability 20 Hz K
A1468 4 to 26.5 3-Wire High (output off) 20 to 1200 G Small Signal, Robustness to Magnetic Signal Anomalies Zero Speed K
A1469 4 to 26.5 3-Wire High (output off) 20 G to 1200 G Small Signal, Robustness to Magnetic Signal Anomalies, Robust EMC Zero Speed K
A1688 4 to 24 2-Wire High or Low
(current)
20 to 1200 G Total Pitch Deviation Zero Speed UB
New as of October 2016ATS468
4 to 26.5 3-Wire
High (output off)
20 to 1200 G
Small Signal, Robustness to Magnetic Signal Anomalies
Zero Speed
SG, SJ
ATS601 3.3 to 24 3-Wire High (off) 0.5 to 2.5 mm Timing Accuracy, Orientation Independent Zero Speed SG
ATS605 4 to 24 3-Wire (×2) High (output off) 0.5 to 2.75 mm High Frequency, Dual Output Direction Detection Zero Speed SG
ATS667 4 to 24 3-Wire High (output off) 0.5 to 3.1 mm Duty Cycle Zero Speed SG
Temperature range code: L = -40°C to 150°C
.

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