Allegro MicroSystems ATS642LSH
The ATS642LSH 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 in twowire applications. The sensor consists of a single-shot molded plastic package that includes a samarium cobalt magnet, a pole piece, and a Hall effect IC that has been optimized to the magnetic circuit. This small package, with optimized two-wire leadframe, can be easily assembled and used in conjunction with a wide variety of gear shapes and sizes.| Part No. | ATS642LSH |
|---|---|
| Datasheet | ATS642LSH Download |
| Manufacturer |  Allegro MicroSystems |
| Description | Peak-Detecting Gear Tooth Sensor |
| Buy | Stock & Price |
FEATURES AND BENEFITS
● Running mode calibration for continuous optimization● Single chip IC for high reliability
● Internal current regulator for 2-wire operation
● Small mechanical size (8 mm diameter × 5.5 mm depth)
● Precise duty cycle signal over operating temperature range
● Large operating air gaps
● Automatic Gain Control (AGC) for air gap independent switchpoints
● Automatic Offset Adjustment (AOA) for signal processing optimization
● True zero-speed operation
● Undervoltage lockout
● Wide operating voltage range Package: 4-pin Module (suffix SH) Not to scale
DESCRIPTION
The integrated circuit incorporates a dual element Hall effect sensor and signal processing that switches in response to differential magnetic signals created by ferrous gear teeth. The circuitry contains a sophisticated digital circuit to reduce magnet and system offsets, to calibrate the gain for air gap independent switchpoints, and to achieve true zero-speed operation. Signal optimization occurs at power-up through the combination of offset and gain adjust and is maintained throughout the operating time with the use of a running mode calibration.
