ATS616LSG

ATS616LSG-DS, Rev. 1

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

115 Northeast Cutoff, Box 15036

www.allegromicro.com

Allegro MicroSystems, Inc.

ABSOLUTE MAXIMUM RATINGS

Operating Temperature

*See Power Derating section.

• Self-calibrating for tight timing accuracy

• First-tooth detection

• Immunity to air gap variation and system offsets

• Eliminates effects of signature tooth offsets

• Integrated capacitor provides analog peak and valley information

• Extremely low timing-accuracy drift with temperature changes

• Large air gap capability

• Small, integrated package

• Optimized magnetic circuit

• Undervoltage lockout (UVLO)

• Wide operating voltage range

Dynamic Self-Calibrating Peak-Detecting Differential

Hall Effect Gear Tooth Sensor

Use the following complete part numbers when ordering:

Part Number

Package

Packing*

ATS616LSGTN-T

4-pin plastic SIP

13-in. reel, 800 pieces/reel

*Contact Allegro for additional packaging and handling options.

Package SG, 4-pin SIP

Features and Benefits

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The ATS616 gear-tooth sensor is a peak-detecting device that uses automatic gain

control and an integrated capacitor to provide extremely accurate gear edge detec-

tion down to low operating speeds. Each sensor module consists of a high-tem-

perature plastic shell that holds together a samarium-cobalt magnet, a pole piece,

and a differential open-collector Hall IC that has been optimized to the magnetic

circuit. This small package can be easily assembled and used in conjunction with a

wide variety of gear shapes and sizes.

The gear-sensing technology used for this sensor module is Hall-effect based. The

sensor incorporates a dual-element Hall IC that switches in response to differential

magnetic signals created by ferrous targets. The sophisticated processing circuitry

contains an A-to-D converter that self-calibrates (normalizes) the internal gain

of the device to minimize the effect of air-gap variations. The patented peak-

detecting filter circuit eliminates magnet and system offsets and has the ability to

discriminate relatively fast changes such as those caused by tilt, gear wobble, and

eccentricities. This easy-to-integrate solution provides first-tooth detection and

stable operation to extremely low rpm. The ATS616 can be used as a replacement

for the ATS612LSB, eliminating the external peak-holding capacitor needed by

the ATS612LSB.

The ATS616 is ideal for use in systems that gather speed, position, and timing

information using gear-tooth-based configurations. This device is particularly

suited to those applications that require extremely accurate duty cycle control or

accurate edge-detection, such as automotive camshaft sensing.

TheATS616 is provided in a 4-pin SIP that is Pb (lead) free, with a 100% matte

tin plated leadframe.

1. VCC

2. VOUT

3. Test Pin (Tie to GND)

4. GND