Allegro offers a selection of wheel speed sensors optimized for today’s demanding ABS applications. Solutions are available for either ferrous targets or magnetic encoder rings, and for speed or speed-and-direction sensing capability. Allegro’s wheel speed sensors provide optimized performance in the presence of harsh automotive conditions. Advanced peak-detection algorithms provide robustness against vehicle dynamics, such as hard cornering, and micro-oscillations in static modes.
Allegro’s solutions offer over a decade of ABS specific IC designs based on the industry’s top professionals and vehicle manufacturers' expertise. These sensor ICs also incorporate over a decade of lessons learned through the harsh, automotive scrutiny of in-vehicle testing and production. Allegro’s wheel speed sensors are offered in two current range options each using a two-wire, current output protocol. Direction information is offered in a two-wire, pulse width output protocol.
|Part Number||Supply Voltage (V)||Output Type||Power-On State||
Specified Air Gap Range
|Key Spec||Min. Speed||Applications||Packages|
|ATS642||4 to 24||2-wire||High (current)||0.5 to 3 mm||Duty cycle||Zero speed||ABS||SH|
|ATS657||4 to 18||2-wire PWM||Low (current)||0.4 to 2.2 mm||Direction Detection||Zero speed||Transmission||SH|
|ATS682||4 to 24||2-wire||High (current)||0.5 to 3 mm||Duty cycle||Zero speed||ABS||SH|
|A1642||4 to 24||2-wire||High (current)||20 to 1000 G||Duty cycle||Zero speed||ABS||KN|
|Temperature range code: L = -40°C to 150°C|