ATS665LSG

True Zero Speed,

High Accuracy, Gear Tooth Sensor

Pin 1: V

The ATS665 true zero-speed gear tooth sensor is an optimized

Hall IC/magnet configuration packaged in a molded module that

provides a user-friendly solution for digital gear tooth sensing

applications.

The sensor module consists of an over-molded

package, which holds together a samarium cobalt magnet, a pole

piece and a true zero-speed Hall IC that has been optimized to the

magnetic circuit. This small package can be easily assembled and

used in conjunction with gears of various shapes and sizes.

The sensor incorporates a dual element Hall IC that switches in

response to differential magnetic signals created by a ferrous

target.

The IC contains a sophisticated compensating circuit

designed to reduce the detrimental effects of magnet and system

offsets. Digital processing of the analog signal provides zero speed

performance independent of air gap and also dynamic adaptation of

device performance to the typical operating conditions found in

automotive applications (reduced vibration sensitivity). High-

resolution peak detecting DACs are used to set the adaptive

switching thresholds of the device. Hysteresis in the thresholds

reduces the negative effects of any anomalies in the magnetic

signal associated with the targets used in many automotive

applications.

CC

Pin 3: Tie to Gnd or Float

Pin 4: Gnd

This sensor’s ability to provide tight duty cycle at high speeds

and over a wide temperature range makes it ideal for transmission

and industrial speed applications. The ATS665 is available in the

SG package in the automotive temperature range, -40° to 150° (L).

ABSOLUTE MAXIMUM RATINGS

1

Supply Voltage ,

FEATURES & BENEFITS

Reverse Supply Voltage,

True zero-speed operation

Switchpoints independent of air gap

Reverse Output Current

High vibration immunity

2,

Precise duty cycle signal over operating temperature range

Continuous Output Current,

Large operating air gaps

Defined power-on state

Ambient Operating Temperature Range,

Wide operating voltage range

Digital output representing target profile

Storage Temperature,

Single-chip sensing IC for high reliability

Small mechanical size

Maximum Junction Temperature,

Optimized Hall IC magnetic system

200 µs power-on time at gear speed < 100 rpm

AGC and reference adjust circuit

Under-voltage lockout

Rev.1

Order by: ATS665LSGTN-T (Pb-free, 800 pieces/reel).

(Pb-based variants are being phased out of the product line. ATS665LSGTN is in production but have 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.)