ATS610LSC

DYNAMIC, PEAK-DETECTING,

DIFFERENTIAL HALL-EFFECT

GEAR-TOOTH SENSOR

The ATS610LSC gear-tooth sensor is an optimized Hall IC plus

magnet subassembly that provides a user-friendly solution for digital

gear-tooth sensing applications. The subassembly combines in a

compact high-temperature plastic shell, a samarium-cobalt magnet, a pole

piece, a differential Hall-effect IC that has been optimized to the

magnetic circuit, and a voltage regulator. The sensor can be easily

used in conjunction with a wide variety of gear or target shapes and

sizes.

The ATS610LSC is designed to provide increased immunity to

false switching in applications that require the sensing of large-tooth

gears (e.g., crank angle or cam angle). The sensor subassembly is

ideal for use in gathering speed, position, and timing information using

gear-tooth-based configurations.

The gear-sensing technology used for this sensor plus magnet

subassembly is Hall-effect based. The sensor incorporates a

dual-element Hall IC that switches in response to differential magnetic

signals created by the ferrous target. The circuitry contains a patented

track-and-hold peak-detecting circuit to eliminate magnet and system

offset effects. This circuit has the ability to detect relatively fast changes,

such as those caused by gear wobble and eccentricities, and provides

stable operation at extremely low rotation speeds.

FEATURES AND BENEFITS

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Fully Optimized Differential Digital Gear-Tooth Sensor

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Single-Chip Sensing IC for High Reliability

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Extremely Low Timing Accuracy Drift with Temperature

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Large Operating Air Gaps

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Small Mechanical Size

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Optimized Magnetic Circuit

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Patented Peak-Detecting Filter:

<200

µs Power-On Time

<10 RPM Operation (single-tooth target)

Correct First-Edge Detection

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Under-Voltage Lockout

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Wide Operating Voltage Range

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Defined Power-Up State

DYNAMIC, PEAK-DETECTING, DIFFERENTIAL

HALL-EFFECT GEAR-TOOTH SENSOR

ATS610LSC

Dwg. AH-008

1

2

3

1 = Supply

2 = Output

3 = Ground

ABSOLUTE MAXIMUM RATINGS

over operating temperature range

Reverse Supply Voltage,

Package Power Dissipation,

Operating Temperature Range,

Always order by complete part number: ATS610LSC .

PRELIMINARY INFORMATION

(subject to change without notice)

September 3, 1998