True Zero Speed Miniature Differential Peak-

Detecting Gear Tooth Sensor

ATS645LSH

10

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

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

www.allegromicro.com

Power Supply Protection

The device contains an on-chip regulator and can operate over

unregulated power supply, transient protection must be added

externally. For applications using a regulated line, EMI/RFI pro-

tection may still be required. Contact Allegro Microsystems for

information on the circuitry needed for compliance with various

EMC specifications. Refer to figure 7 for an example of a basic

application circuit.

Undervoltage Lockout

When the supply voltage falls below the undervoltage lockout

Assembly Description

This sensor is integrally molded into a plastic body that has been

optimized for size, ease of assembly, and manufacturability.

High operating temperature materials are used in all aspects

of construction.

Figure 7: Typical Application Circuit

ATS645

VCC

GND

V+

0.01

1

4

µF

ECU

Pins 2 and 3 floating

R

100

Ω

SENSE