Three-Wire, Differential, Vibration Resistant

Sensor IC with Speed and Direction Output

ATS693LSG

4

Allegro MicroSystems, LLC

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

Characteristic

Symbol

Test Conditions

Min.

Max.

Unit

Performance Characteristics

Air Gap Range

AG

Using Allegro Reference Target 60-0

0.5

–

2.75

mm

Vibration Immunity (Startup)

–

–

deg.

Vibration Immunity (Running Mode)

–

–

deg.

Input Magnetic Characteristics

Allowable Differential Sequential

Signal cycle-to-cycle variation (see figure 2)

0.6

–

–

–

Calibration

Amount of target rotation

(constant direction) following

power-on until first electrical

AG ≥ 0.5 mm

AG < 2.25 mm

–

2 ×

<3 ×

deg.

AG ≥ 2.25 mm

AG ≤ 2.75 mm

–

2.5 ×

<4 ×

deg.

First Direction Pulse Output Following

Direction Change

1 ×

2 ×

<3 ×

deg.

First Direction Pulse Output Following

Running Mode Vibration

1 ×

2 ×

<3 ×

deg.

1

2

Maximum voltage must be adjusted for power dissipation and junction temperature; see Power Derating section.

3

Negative current is defined as conventional current coming out of (sourced from) the specified device terminal.

4

Sustained voltages beyond the clamp voltage may cause permanent damage to the IC.

5

6

Maximums of both Operating Frequency (Reverse Rotation) and Operating Frequency (Non-Direction Pulses) are determined by satisfactory separation of output pulses:

7

If the minimum signal phase separation is not maintained during or after a signal variation event, output may be blanked or non-direction pulses may occur. A signal varia-

tion event during power-on may increase the quantity of edges required to get correct direction pulses.

8

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

Target 60-0; unless otherwise specified