Allegro Manuals

The ATS635LSE and ATS636LSE programmable, true power-on state (TPOS), sensors are an optimized Hall-effect IC and magnet combination that switch in response to magnetic signals created by ferrous targets in gear-tooth sensing and proximity applications. The devices are externally programmable. A wide range programmability is available on the magnetic operate point (BOP) while theof hysteresis remains fixed. This advanced feature allows for optimization of the sensor switch point and can drastically reduce the effects of mechanical placement tolerances found in production environments . A proprietary dynamic offset cancellation technique, with an internal high-frequency clock, reduces the residual offset voltage, which is normally caused by device overmolding, temperature dependencies, and thermal stress. Having the Hall element and amplifier in a single chip minimizes many problems normally associated with low-level analog signals. This sensor system is ideal for use in gathering speed or position information using gear-tooth-based configurations, or for proximity sensing with ferrous targets. The ATS635LSE switches HIGH in the presence of a ferrous target or tooth and switches LOW in the presence of a target valley, window, or when the ferrous target is removed. The ATS636LSE has the opposite polarity and switches LOW in the presence of a ferrous target

ATS625LSG is a digital gear tooth sensor produced by Allegro, which has high repeatability, high accuracy, high reliability and other characteristics.

This document describes the features and characteristics of the ATS616LSG-DS model, a dynamic self-calibrating peak-detecting differential Hall effect gear tooth sensor. The sensor features self-calibration, tight timing accuracy, first-tooth detection, immunity to air gap variation and system offsets, and other capabilities.

ATS612LSG Dynamic, Self-Calibrating, Peak-Detecting, Differential Hall-Effect Gear-Tooth Sensor

This datasheet introduces the features of ATS612LSB gear tooth sensor, including automatic gain control, differential open-collector Hall IC, high-temperature plastic shell, small package, and a variety of gear shapes and sizes

ATS610LSC is a dynamic, peak-detecting, differential Hall-effect gear-tooth sensor designed for digital gear-tooth sensing applications. The sensor is housed in a high-temperature plastic shell and integrates an optimized Hall IC, magnet subassembly, pole piece, and voltage regulator. It can be used with various gear or target shapes and sizes and offers increased immunity to false switching. The sensor subassembly is ideal for gathering speed, position, and timing information using gear-tooth-based configurations. It utilizes Hall-effect technology and incorporates a dual-element Hall IC that switches in response to differential magnetic signals created by the ferrous target. The sensor includes a patented track-and-hold peak-detecting circuit to eliminate magnet and system offset effects and provides stable operation at extremely low rotation speeds.

ATS622LSB data sheet is a hall effect gear tooth sensor that uses an optimized Hall-effect sensing integrated circuit and magnet combination to provide 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.

ATS535JSB and ATS535SSB programmable, true power-on (TPOS), proximity sensors provide power-on tooth/valley recognition in large gear-tooth sensing applications and proximity detection in other applications.

ATS632LSC HALL-EFFECT GEAR-TOOTH SENSOR SUBASSEMBLY is a zero-speed, self-calibrating, non-oriented, hall-effect gear-tooth sensor.

The A3282 Hall-effect sensor is a temperature stable, stress-resistant latch. It achieves superior high-temperature performance by utilizing Allegro's patented dynamic offset cancellation that reduces the offset voltage caused by device overmolding, temperature dependencies, and thermal stress. The A3282 complements the current Allegro family of chopper-stabilized latching sensors.

These Hall-effect latches are extremely temperature-stable and stress-resistant sensors especially suited for operation over extended temperature ranges to +150°C. Superior high-temperature performance is made possible through a novel Schmitt trigger circuit that maintains operate and release point symmetry by compensating for temperature changes in the Hall element. Additionally, internal compensation provides magnetic switch points that become more sensitive with temperature, hence offsetting the usual degradation of the magnetic field with temperature. The symmetry capability makes these devices ideal for use in pulse-counting applications where duty cycle is an important parameter. The four basic devices (3185, 3187, 3188, and 3189) are identical except for magnetic switch points. Each device includes on a single silicon chip a voltage regulator, quadratic Hall-voltage generator, temperature compensation circuit, signal amplifier, Schmitt trigger, and a buffered open-collector output to sink up to 25 mA. The on-board regulator permits operation with supply voltages of 3.8 to 24 volts. The first character of the part number suffix determines the device operating temperature range. Suffix ‘E–’ is for -40°C to +85°C, and suffix ‘L–’ is for -40°C to +150°C. Three package styles provide a magnetically optimized package for most applications. Suffix ‘–LT’ is a miniature SOT89/ TO-243AA transistor package for surface-mount

The A3280, A3281, and A3283 Hall-effect latches are extremely temperature-stable and stress-resistant sensors, especially suited for operation over extended temperature ranges up to +150°C. Superior high-temperature performance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The three devices are identical except for magnetic switch points. Each device includes on a single silicon chip a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a short-circuit protected open-collector output to sink up to 25 mA. A south pole of sufficient strength will turn the output on. A north pole is necessary to turn the output off. An on-board regulator permits operation with supply voltages of 4.2 to 24 volts. Three package styles provide a magnetically optimized package for most applications. Package type LH is a modified SOT23W surface-mount package, LT is a miniature SOT89/TO-243AA transistor package for surface-mount applications; while UA is a three-lead ultra-mini-SIP for through-hole mounting. Each package type is also available in a lead (Pb) free version (suffix, –T), with a 100% matte tin plated leadframe. Data Sheet 27609.20c

A3280--, A3281--, and A3283-- Hall-effect latches are extremely temperature-stable and stress-resistant sensors especially suited for operation over extended temperature ranges to +150°C.

The A3280--, A3281--, and A3283-- Hall-effect latches are ex- tremely temperature-stable and stress-resistant sensors especially suited for operation over extended temperature ranges to +150°C. Superior high-temperature performance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The three devices are identical except for magnetic switch points. Each device includes on a single silicon chip a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a short-circuit protected open-collector output to sink up to 25 mA. A south pole of sufficient strength will turn the output on. A north pole is necessary to turn the output off. An on-board regulator permits operation with supply voltages of 4.2 to 24 volts. The first character of the part number suffix determines the device operating temperature range; suffix ‘E–’ is for -40°C to +85°C and ‘L–’ is -40°C to +150°C. Three package styles provide a magnetically optimized package for most applications. Suffix ‘–LH’ is a miniature SOT23W low-profile surface-mount package, ‘–LT’ is a miniature SOT89/TO-243AA transistor package for surface-mount applications; while suffix ‘–UA’ is a three-lead ultra-mini-SIP for through-hole mounting. Data Sheet 27609.20b FEATURES I Symmetrical Switch Points I Resistant to Physical Stress I Superior Temperature Stability