ATS622LSB

TRUE ZERO-SPEED

HALL-EFFECT GEAR-TOOTH SENSOR

The ATS622LSB is an optimized Hall-effect sensing integrated

circuit and magnet combination that provides a user-friendly solution

for true zero-speed digital gear-tooth sensing. The sensor module

consists of a plastic shell that holds together a samarium-cobalt magnet,

a pole piece, and a Hall-effect sensor 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 integrated circuit incorporates a dual-element Hall-effect

sensor and signal processing that switches in response to differential

magnetic signals created by the ferrous gear teeth. The circuitry

contains a sophisticated digital circuit to eliminate magnet and system

offsets and to achieve true zero-speed operation (manufactured under

U.S. Pat. 5,917,320). A-to-D and D-to-A converters are used to adjust

the device gain at power on and to allow air-gap independent switching,

which greatly reduces vibration sensitivity of the device.

This sensor system is ideal for obtaining transmission and crank

information using gear-tooth-based configurations.

FEATURES AND BENEFITS

s Tight timing accuracy over temperature

s True zero-speed operation

s Air-gap independent switch points

s High vibration immunity

s Extremely precise duty cycle signal with temperature

s Large operating air gaps

s Defined power-on state

s Wide operating voltage range

s Digital output representing gear profile

s Single-chip sensing IC for high reliability

s Small mechanical size (9 mm diameter x 7 mm length)

s Optimized magnetic circuit

s <200

µs power-on time

s AGC and reference-adjust circuit

s Under-voltage lockout

Always order by complete part number: ATS622LSB .

Dwg. AH-006-6

1

2

3

4

Pin 1 = Supply

Pin 2 = Output

Pin 3 = No Connection

Pin 4 = Ground

ABSOLUTE MAXIMUM RATINGS

Package Power Dissipation,

Operating Temperature Range,

Junction Temperature,

* Operation at increased supply voltages with

external circuitry is described in Applications

Information. Devices for operation at in-

creased temperatures are available on special

order.

Some restrictions may apply to certain types of sales.

Contact factory for details.