Three-Wire, Differential, Vibration Resistant

Sensor IC with Speed and Direction Output

ATS693LSG

12

Allegro MicroSystems, LLC

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

Figure 8: Output Functionality in the Presence of Running Mode Target Vibration

Target

Differential

Magnetic

Profile

Normal Target Rotation

Vibration

Normal Target Rotation

Tooth

Valley

Vibration Detection

Algorithms embedded in the IC digital controller detect the

presence of target vibration through analysis of the two magnetic

input channels.

In the presence of vibration, the output is blanked and no output

pulses will occur for vibrations less than the specified vibration

immunity. Output pulses containing the proper direction infor-

mation will resume when direction information is validated on

constant target rotation.