Two-Wire, Differential, Vibration-Resistant Sensor

with Speed and Direction Output

ATS699LSN

6

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Target 60-0, unless otherwise noted.

Characteristics

Symbol

Test Conditions

Min.

Max.

Unit

INPUT MAGNETIC CHARACTERISTICS

Allowable Differential Sequential

Signal Variation 1

Signal cycle-to-cycle variation (see Figure 3)

0.6

–

–

–

Allowable Differential Sequential

Signal Variation 2

Overall signal variation (see Figure 3)

0.4

–

–

–

CALIBRATION

Amount of target

rotation (constant

direction) following

power-on until first

electrical output pulse

–

2 ×

< 3 ×

degrees

–

2.5 ×

< 4 ×

degrees

First Direction-Pulse Output Following

Direction Change

NCD

Amount of target

rotation (constant

direction) following

event until first

electrical output pulse

See Figure 2..

-xxxxL variant

–

1

–

switch-

point

-xxxxH variant

1 ×

2 ×

< 3 ×

degrees

First Direction-Pulse Output Following

Running Mode Vibration

Amount of target

rotation (constant

direction) following

event until first

electrical output pulse

-xxxxL variant

–

–

1.25 ×

degrees

-xxxxH variant

1 ×

2 ×

< 3 ×

1

2

Power-up frequencies ≤ 200 Hz. Higher power-on frequencies may require more input magnetic cycles until output edges are achieved.

B

SEQ(n)

B

SEQ(n + 1)

B, i≥ 2

SEQ(n+1)

Figure 3: Differential Signal Variation