Self-Calibrating, Zero-Speed Differential

Gear Tooth Sensor with Continuous Update

ATS643LSH

2

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

Part Number

ATS643LSHTN-I1-T

Yes

Tape and Reel 13-in. 800 pcs./reel

6.0 Low to 14.0 High mA

ATS643LSHTN-I2-T

Yes

Tape and Reel 13-in. 800 pcs./reel

7.0 Low to 14.0 High mA

been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently restricted

to existing customer applications. The device should not be purchased for new design applications because obsolescence

in the near future is probable. Samples are no longer available. Status change: May 1, 2006. These variants include:

ATS643LSHTN-I1 and ATS643LSHTN-I2.

▪ AGC and reference adjust circuit

▪ True zero-speed operation

▪ Undervoltage lockout

▪ Wide operating voltage range

▪ Defined power-on state

the device specifications even through large changes in air gap

or temperature.

The regulated current output is configured for two-wire operation,

offering inherent diagnostic information. This device is ideal for

obtaining speed and duty cycle information in gear-tooth based

applications such as transmission speed sensing.

Features and Benefits (continued)

Description (continued)

Absolute Maximum Ratings

Characteristic

Symbol

Notes

Rating

Units

Supply Voltage

See Power Derating section

–

–

Reverse-Supply Voltage

–18

V

Operating Ambient Temperature

Range L

–40 to 150

ºC

Maximum Junction Temperature

165

ºC

Storage Temperature

–65 to 170

ºC

Terminal List

Name

Description

Number

VCC

Connects power supply to chip

1

NC

No connection. Float or tie to VCC

2

TEST

For Allegro use, float or tie to GND

3

GND

Ground terminal

4

2

4

3

1

Pin-out Diagram