The ATS660LSB is an ideal gear-tooth sensor solution for uniform teeth targets as found in today’s demanding transmission applications. This digital differential Hall-effect sensor is the choice when repeatability and timing accuracy count. The ATS660LSB incorporates patented self-calibration circuitry (U.S. Pat. 5,917,320) that nulls out the effects of installation air gap, ambient temperature, and magnet offsets to provide superior timing accuracy with symmetrical targets over large operating air gaps — typical of targets used in speed-sensing applications (pitches varying from below 0.5 to over 1.2 teeth per diametric millimeter). The self-calibration at power up keeps the performance optimized over the life of the sensor. The ATS660LSB has an open collector output for direct digital interfacing with no further signal processing required. This device is available in a small 9-mm diameter by 7-mm long package for optimal manufacturing.

FEATURES AND BENEFITS

■ Fully optimized differential digital gear-tooth sensor

■ Single-chip sensing IC for high reliability

■ High vibration immunity

■ Precise duty cycle

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

■ Automatic gain control circuitry (self calibration)

■ True zero-speed operation

■ Under-voltage lockout

■ Wide operating temperature range

■ Optimized Hall IC magnetic circuit

■ Digital signal processing

■ Large operating air gap range

■ Wide operating voltage range

■ Excellent repeatability performance

■ Defined power-on state

ABSOLUTE MAXIMUM RATINGS at TA = 25°C

Supply Voltage, VCC ........................ 26.5 V*

Reverse Supply Voltage, VRCC ............ -24 V

Output OFF Voltage, VOUT ................. 26.5 V

Reverse Output Voltage, VROUT .......... -24 V

Continuous Output Current, IOUT ....... 20 mA

Reverse Output Current, IROUT .......... 50 mA

Package Power Dissipation, PD .......................................... See Graph

Operating Temperature Range, TA ............................. -40°C to +150°C*

Junction Temperature,

(continuous), TJ .......................... +165°C

(100 hr), TJM ............................... +180°C

Storage Temperature, TS ................... +170°C